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YAMAHA XT660R Service Manual

Motorcycle xt660r; xt660s; xt660x; xt660s.
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2004
XT660R(S)
XT660X(S)
5VK1-AE1
SERVICE MANUAL

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Troubleshooting

   Also See for YAMAHA XT660R

   Summary of Contents for YAMAHA XT660R

  • Page 1

    2004 XT660R(S) XT660X(S) 5VK1-AE1 SERVICE MANUAL...

  • Page 3

    EAS00000 XT660R(S)/XT660X(S) 2004 SERVICE MANUAL ©2003 by MBK Industrie First edition, December 2003 All rights reserved. Any reproduction or unauthorized use without the written permission of MBK Industrie is expressly prohibited.

  • Page 4: Specifications

    EAS00002 NOTICE This manual was produced by MBK Industrie primarily for use by Yamaha dealers and their quali- fied mechanics. It is not possible to include all the knowledge of a mechanic in one manual. There- fore, anyone who uses this book to perform maintenance and repairs on Yamaha vehicles should have a basic understanding of mechanics and the techniques to repair these types of vehicles.

  • Page 5: How To Use This Manual

    EAS00007 HOW TO USE THIS MANUAL This manual is intended as a handy, easy-to-read reference book for the mechanic. Comprehensive explanations of all installation, removal, disassembly, assembly, repair and check procedures are laid out with the individual steps in sequential order. 1 The manual is divided into chapters.

  • Page 6: Chassis, Engine, Cooling System, Fuel Injection System, Electrical System

    EAS00008 SYMBOLS The following symbols are not relevant to SPEC every vehicle. INFO Symbols 1 to 9 indicate the subject of each chapter. 1 General information 2 Specifications CHAS 3 Periodic checks and adjustments 4 Chassis 5 Engine 6 Cooling system 7 Fuel injection system COOL 8 Electrical system...

  • Page 7: Table Of Contents

    EAS00010 TABLE OF CONTENTS GENERAL INFORMATION INFO SPECIFICATIONS SPEC PERIODIC CHECKS AND ADJUSTMENTS CHASSIS CHAS ENGINE COOLING SYSTEM COOL FUEL INJECTION SYSTEM – ELECTRICAL SYSTEM ELEC TROUBLESHOOTING TRBL SHTG...

  • Page 9

    INFO...

  • Page 10: Table Of Contents

    INFO CHAPTER 1 GENERAL INFORMATION MOTORCYCLE IDENTIFICATION..............1-1 VEHICLE IDENTIFICATION NUMBER .............1-1 MODEL LABEL..................1-1 FEATURES...................... 1-2 OUTLINE ....................1-2 FI SYSTEM....................1-3 IMPORTANT INFORMATION ................. 1-4 PREPARATION FOR REMOVAL AND DISASSEMBLY......1-4 REPLACEMENT PARTS................1-4 GASKETS, OIL SEALS AND O-RINGS ............ 1-4 LOCK WASHERS/PLATES AND COTTER PINS ........1-5 BEARINGS AND OIL SEALS ..............

  • Page 11

    INFO...

  • Page 12: Motorcycle Identification, Vehicle Identification Number, Model Label

    MOTORCYCLE IDENTIFICATION INFO EAS00014 GENERAL INFORMATION MOTORCYCLE IDENTIFICATION EAS00017 VEHICLE IDENTIFICATION NUMBER The vehicle identification number 1 is stamped into the right side of the steering head pipe. EAS00018 MODEL LABEL The model label 1 is affixed to the frame. This information will be needed to order spare parts.

  • Page 13: Features, Outline, Fi System

    FEATURES INFO EAS00019 FEATURES EAS00896 OUTLINE The main function of a fuel supply system is to provide fuel to the combustion chamber at the opti- mum air-fuel ratio in accordance with the engine operating conditions and the atmospheric tempera- ture. In a conventional carburetor system, the air-fuel ratio of the mixture that is supplied to the combustion chamber is created by the volume of the intake air and the fuel that is metered by the jet used in the respective chamber.

  • Page 14

    FEATURES INFO EAS00897 FI SYSTEM The fuel pump delivers fuel to the injector via the fuel filter. The pressure regulator maintains the fuel pressure that is applied to the injector at 324 kPa (3.24 kg/cm , 46.1 psi) higher than the intake manifold pressure.

  • Page 15: Important Information, Preparation For Removal And Disassembly, Replacement Parts, Gaskets, Oil Seals And O-rings

    5. Keep all parts away from any source of fire. EAS00021 REPLACEMENT PARTS Use only genuine Yamaha parts for all replacements. Use oil and grease recom- mended by Yamaha for all lubrication jobs. Other brands may be similar in function and appearance, but inferior in quality.

  • Page 16: Lock Washers/plates And Cotter Pins, Bearings And Oil Seals, Circlips

    IMPORTANT INFORMATION INFO EAS00023 LOCK WASHERS/PLATES AND COTTER PINS After removal, replace all lock washers/plates 1 and cotter pins. After the bolt or nut has been tightened to specification, bend the lock tabs along a flat of the bolt or nut. EAS00024 BEARINGS AND OIL SEALS Install bearings and oil seals so that the manu-...

  • Page 17: Checking The Connections

    CHECKING THE CONNECTIONS INFO EAS00026 CHECKING THE CONNECTIONS Check the leads, couplers, and connectors for stains, rust, moisture, etc. 1. Disconnect: • lead • coupler • connector 2. Check: • lead • coupler • connector Moisture → Dry with an air blower. Rust/stains →...

  • Page 18: Special Tools

    SPECIAL TOOLS INFO EAS00027 SPECIAL TOOLS The following special tools are necessary for complete and accurate tune-up and assembly. Use only the appropriate special tools as this will help prevent damage caused by the use of inappropri- ate tools or improvised techniques. Special tools, part numbers or both may differ depending on the country.

  • Page 19

    SPECIAL TOOLS INFO Tool No. Tool name/Function Illustration T-handle Damper rod holder T-handle 90890-01326 Holder These tools are used to hold the damper 90890-01460 rod holder when removing or installing the damper rod. Radiator cap tester adaptor 90890-01352 This tool is used to check the cooling sys- tem.

  • Page 20

    SPECIAL TOOLS INFO Tool No. Tool name/Function Illustration Thickness gauge 90890-03079 This tool is used to measure the valve clearance. Compression gauge 90890-03081 These tools are used to measure the engine compression. Pocket tester 90890-03112 This tool is used to check the electrical system.

  • Page 21

    SPECIAL TOOLS INFO Tool No. Tool name/Function Illustration Valve guide remover (ø 6) 90890-04064 This tool is needed to remove and install the valve guides. Valve guide installer (ø 6) 90890-04065 This tool is needed to install the valve guides. Valve guide reamer (ø...

  • Page 22

    SPECIAL TOOLS INFO Tool No. Tool name/Function Illustration Yamaha bond No. 1215 90890-85505 This bond is used to seal two mating sur- faces (e.g., crankcase mating surfaces). 1 - 11...

  • Page 24

    SPEC...

  • Page 25: Table Of Contents

    SPEC CHAPTER 2 SPECIFICATIONS GENERAL SPECIFICATIONS ................ 2-1 ENGINE SPECIFICATIONS ................2-2 CHASSIS SPECIFICATIONS ................2-11 ELECTRICAL SPECIFICATIONS ..............2-16 CONVERSION TABLE .................. 2-19 GENERAL TIGHTENING TORQUE SPECIFICATIONS.......2-19 TIGHTENING TORQUE................. 2-20 ENGINE TIGHTENING TORQUE ............2-20 CHASSIS TIGHTENING TORQUES............2-23 LUBRICATION POINTS AND LUBRICANT TYPES ........2-25 ENGINE....................

  • Page 26

    SPEC...

  • Page 27: General Specifications

    ---- XT660X: 1D21 (Europe) ---- 1D22 (AUS) ---- 1D23 (GB) ---- Dimensions Overall length 2,240 mm (88.2 in) (XT660R) ---- 2,150 mm (84.6 in) (XT660X) ---- Overall width 845 mm (33.3 in) (XT660R) ---- 865 mm (34.1 in) (XT660X) ---- Overall height 1,230 mm (48.4 in) (XT660R)

  • Page 28: Engine Specifications

    SPEC ENGINE SPECIFICATIONS ENGINE SPECIFICATIONS Item Standard Limit Engine Engine type Liquid-cooled, 4-stroke, SOHC ---- Displacement 660 cm (40.27 cu · in) ---- Cylinder arrangement Forward-inclined single cylinder ---- Bore × stroke 100.0 × 84.0 mm (3.94 × 3.31 in) ---- Compression ratio 10.00 : 1...

  • Page 29

    SPEC ENGINE SPECIFICATIONS Item Standard Limit Oil pump Oil pump type Trochoid ---- Inner-rotor-to-outer-rotor-tip clear- 0.07 ~ 0.12 mm (0.0028 ~ 0.0047 in) 0.2 mm ance (0.008 in) Outer-rotor-to-oil-pump-housing 0.03 ~ 0.08 mm (0.0012 ~ 0.0031 in) 0.15 mm clearance (0.0059 in) Oil-pump-housing-to-inner-rotor-and- 0.03 ~ 0.08 mm (0.0012 ~ 0.0031 in)

  • Page 30

    SPEC ENGINE SPECIFICATIONS Item Standard Limit Camshaft Drive system Chain drive (left) ---- Intake camshaft lobe dimensions Measurement A 43.488 ~ 43.588 mm (1.7121 ~ 1.7161 in) 43.338 mm (1.7062 in) Measurement B 36.959 ~ 37.059 mm (1.4551 ~ 1.4590 in) 36.840 mm (1.4504 in) Exhaust camshaft lobe dimensions Measurement A...

  • Page 31

    SPEC ENGINE SPECIFICATIONS Item Standard Limit Rocker arm/rocker arm shaft Rocker arm inside diameter 12.000 ~ 12.018 mm (0.4724 ~ 0.4731 in) 12.036 mm (0.4739 in) Shaft outside diameter 11.981 ~ 11.991 mm (0.4717 ~ 0.4721 in) 11.955 mm (0.4707 in) Arm-to-shaft clearance 0.009 ~ 0.037 mm (0.0004 ~ 0.0015 in) 0.081 mm...

  • Page 32

    SPEC ENGINE SPECIFICATIONS Item Standard Limit Valve-stem-to-valve-guide clearance Intake 0.010 ~ 0.037 mm (0.0004 ~ 0.0015 in) 0.08 mm (0.0031 in) Exhaust 0.025 ~ 0.052 mm (0.0010 ~ 0.0020 in) 0.10 mm (0.0039 in) Valve stem runout ---- 0.010 mm (0.0004 in) Valve seat width Intake...

  • Page 33

    SPEC ENGINE SPECIFICATIONS Item Standard Limit Cylinder Cylinder arrangement Forward-inclined single cylinder ---- Bore × stroke 100.0 × 84.0 mm (3.94 × 3.31 in) ---- Compression ratio 10 : 1 ---- Bore 100.000 ~ 100.010 (3.9370 ~ 3.9374 in) 100.080 mm (3.9402 in) Maximum taper ----...

  • Page 34

    SPEC ENGINE SPECIFICATIONS Item Standard Limit 2nd ring Ring type Taper ---- Dimensions (B × T) 1.20 × 4.00 mm (0.047 × 0.157 in) ---- End gap (installed) 0.35 ~ 0.50 mm (0.0138 ~ 0.0197 in) 0.85 mm (0.0335 in) Ring side clearance 0.030 ~ 0.070 mm (0.0012 ~ 0.0028 in) 0.11 mm...

  • Page 35

    SPEC ENGINE SPECIFICATIONS Item Standard Limit Clutch Clutch type Wet, multiple disc ---- Clutch release method Outer pull, rack and pinion pull ---- Operation Left-hand operation ---- Clutch cable free play 10.0 ~ 15.0 mm (0.39 ~ 0.59 in) ---- (at the end of the clutch lever) Friction plates 1 (inside dia.: 120 mm)

  • Page 36

    SPEC ENGINE SPECIFICATIONS Item Standard Limit Maximum main axle runout ---- 0.08 mm (0.0031 in) Maximum drive axle runout ---- 0.08 mm (0.0031 in) Shifting mechanism Shift mechanism type Shift drum and guide bar ---- Decompression device Device type Auto decomp ---- Air filter type Oil-coated paper element...

  • Page 37: Chassis Specifications

    Limit Frame Frame type Diamond ---- Caster angle 27.25° (XT660R) ---- 26° (XT660X) ---- Trail 107 mm (4.21 in) (XT660R) ---- 94 mm (3.70 in) (XT660X) ---- Front wheel Wheel type Spoke wheel ---- 21 × 1.85 (XT660R) Size ---- 17M/C ×...

  • Page 38

    SIRAC/MICHELIN (XT660R) DRAGON/PIRELLI (XT660X) ---- Tire pressure (cold) 0 ~ 90 kg (0 ~ 198 lb) 200 kPa (2.00 kgf/cm, 29 psi) (XT660R) ---- 210 kPa (2.10 kgf/cm, 30 psi) (XT660X) ---- 90 (198 lb) ~ Maximum load* 200 kPa (2.00 kgf/cm, 29 psi) (XT660R) ---- 220 kPa (2.20 kgf/cm, 31 psi) (XT660X)

  • Page 39

    32.00 mm × 1 (1.26 in × 1) and Caliper cylinder inside diameter ---- 30.00 mm × 1 (1.18 in × 1) (XT660R) 34.00 mm × 2 (1.34 in × 2) and ---- 30.00 mm × 2 (1.18 in × 2) (XT660X)

  • Page 40

    (XT660R) 3.75 N/mm (0.38 kg/mm, 21.41 lb/in) ---- (XT660X) Spring stroke (K1) 0 ~ 120.0 mm (0 ~ 4.72 in) (XT660R) ---- 0 ~ 120.0 mm (0 ~ 4.72 in) (XT660X) ---- Spring rate (K2) 6.00 N/mm (0.61 kg/mm, 34.26 lb/in)

  • Page 41

    SPEC CHASSIS SPECIFICATIONS Item Standard Limit Rear suspension Suspension type Swingarm (monocross) ---- Rear shock absorber assembly type Coil spring/gas-oil damper ---- Rear shock absorber assembly travel 65.0 mm (2.56 in) ---- Spring Free length 216.0 mm (8.50 in) 205 mm (8.07 in) Installed length 206.0 mm (8.11 in)

  • Page 42: Electrical Specifications

    SPEC ELECTRICAL SPECIFICATIONS ELECTRICAL SPECIFICATIONS Item Standard Limit System voltage 12 V ---- Ignition system Ignition system type Transistorized coil ignition (digital) ---- Ignition timing 9.0° BTDC at 1,400 r/min ---- Advancer type Electric ---- 192 ~ 288 Ω at 20 °C (68 °F) Crankshaft position senor resistance/ ---- color...

  • Page 43

    SPEC ELECTRICAL SPECIFICATIONS Item Standard Limit Bulbs (voltage/wattage × quantity) 12 V 55.0 W/60.0 W × 1 Headlight ---- 12 V 5.0 W × 1 Auxiliary light ---- 12 V 5.0 W/21.0 W × 1 Tail/brake light ---- 12 V 10.0 W × 2 Front turn signal light ---- 12 V 10.0 W ×...

  • Page 44

    SPEC ELECTRICAL SPECIFICATIONS Item Standard Limit Headlight relay Model/manufacturer ACM33211 M04/MATSUSHITA ---- Radiator fan Model/manufacturer 5VW/KTM ---- Fan motor relay Model/manufacturer ACM33211 M04/MATSUSHITA ---- Intake air pressure sensor Thermostat type/manufacturer 5PS1/DENSO ---- Output voltage 3.4 ~ 3.8 V ---- Intake air temperature sensor Model/manufacturer 5VU1/DENSO ----...

  • Page 45: Conversion Table, General Tightening Torque Specifications

    CONVERSION TABLE/ SPEC GENERAL TIGHTENING TORQUE SPECIFICATIONS EAS00028 EAS00030 CONVERSION TABLE GENERAL TIGHTENING TORQUE All specification data in this manual are listed SPECIFICATIONS in SI and METRIC UNITS. This chart specifies tightening torques for stan- Use this table to convert METRIC unit data to dard fasteners with a standard ISO thread IMPERIAL unit data.

  • Page 46: Tightening Torque, Engine Tightening Torque

    SPEC TIGHTENING TORQUE TIGHTENING TORQUE ENGINE TIGHTENING TORQUE Tightening torque Thread Part to be tightened Part name Q’ty Remarks size Nm m · kg ft · lb Cylinder head (exhaust pipe) Stud bolt Cylinder head (left side) Bolt = 145 mm (5.71 in) Cylinder head (right side) Bolt = 135 mm (5.31 in)

  • Page 47

    SPEC TIGHTENING TORQUE Tightening torque Thread Part to be tightened Part name Q’ty Remarks size Nm m · kg ft · lb Oil strainer Bolt Oil pump Screw Oil baffle plate 2 Bolt Oil pump assembly Screw Engine oil drain bolt (crankcase) Bolt Oil filter element cover Bolt...

  • Page 48

    SPEC TIGHTENING TORQUE Tightening torque Thread Part to be tightened Part name Q’ty Remarks size Nm m · kg ft · lb Starter clutch Bolt Stator coil Bolt Crankshaft position sensor Bolt Starter motor and crankcase Bolt Starter motor lead Brush holder and starter motor yoke Starter motor assembly Bolt...

  • Page 49: Chassis Tightening Torques

    Clutch lever holder Front brake master cylinder and brake lever Grip end Front brake hose union bolt Front mud guard (XT660R) Front mud guard and front fork protector (XT660R) Stabilizer and front mud guard (XT660X) Stabilizer, front mud guard, and front fork...

  • Page 50

    SPEC TIGHTENING TORQUE Tightening torque Thread Part to be tightened Remarks size Nm m · kg ft · lb Fuel tank and frame Fuel pump and fuel tank Rectifier/regulator and air filter case ECU and air filter case Horn bracket and frame Side panels (left and right) and frame Grab bar, rear cover and frame Rear mud guard and frame...

  • Page 51: Lubrication Points And Lubricant Types, Engine

    SPEC LUBRICATION POINTS AND LUBRICANT TYPES EAS00031 LUBRICATION POINTS AND LUBRICANT TYPES ENGINE Lubrication Point Symbol Oil seal lips O-rings Bearings Cylinder head tightening bolts Cylinder tightening bolts Crankshaft pin Timing chain sprocket inner surface Connecting rod big end thrust surface Piston pin Piston and ring groove Balancer weight tightening nut...

  • Page 52

    SPEC LUBRICATION POINTS AND LUBRICANT TYPES Lubrication Point Symbol Yamaha bond Crankcase mating surface No.1215 Yamaha bond A.C. magnet lead grommet (A.C. magneto cover) No.1215 Yamaha bond Oil seal holder tightening bolt No.1215 Yamaha bond Oil delivery hose 2 tightening bolt No.1215...

  • Page 53

    SPEC LUBRICATION POINTS AND LUBRICANT TYPES EAS00032 CHASSIS Lubrication Point Symbol Front wheel oil seal lips (left and right) Rear wheel oil seal lips (left and right) Rear wheel drive hub contact surface Rear arm pivot shaft outer surface and bush outer surface and oil seal lip Dust cover thrust surface Relay arm and rear shock absorber mounting bolt outer surface Relay arm and rear shock absorber oil seal lips...

  • Page 54: Cooling System Diagrams

    SPEC COOLING SYSTEM DIAGRAMS EAS00033 COOLING SYSTEM DIAGRAMS 1 Water jacket joint È From the radiator 2 Water pump outlet hose É To the cylinder 3 Water pump outlet pipe 4 Water pump È É È 2 - 28...

  • Page 55

    SPEC COOLING SYSTEM DIAGRAMS 1 Fast idle plunger outlet hose È From the fast idle plunger 2 Coolant reservoir breather hose É To the cylinder 3 Coolant reservoir hose Ê From the thermostat 4 Radiator cap 5 Radiator 6 Coolant reservoir cap 7 Coolant reservoir 8 Radiator outlet hose 9 Water pump...

  • Page 56: Lubrication Chart

    SPEC LUBRICATION CHART LUBRICATION CHART : Pressure feed : Splashed scavenge Camshaft Cylinder head Oil tank Oil filter Crankshaft Drive axle Main axle Connecting Check ball Oil pump rotor 1 Oil pump rotor 2 Oil strainer Oil pan 2 - 30...

  • Page 57: Lubrication Diagrams

    SPEC LUBRICATION DIAGRAMS EAS00034 LUBRICATION DIAGRAMS 1 Oil delivery hose 2 2 Oil strainer 3 Oil delivery hose 1 2 - 31...

  • Page 58

    SPEC LUBRICATION DIAGRAMS 1 Oil delivery pipe 2 2 Oil delivery pipe 1 3 Oil filter 4 Oil pump 2 - 32...

  • Page 59

    SPEC LUBRICATION DIAGRAMS 1 Oil delivery hose 2 È To oil tank 2 Oil delivery pipe 2 3 Oil filter 4 Oil pump rotor 1 5 Oil pump rotor 2 6 Main axle 7 Oil delivery pipe 3 È 2 - 33...

  • Page 60

    SPEC LUBRICATION DIAGRAMS 1 Camshaft 2 Oil delivery pipe 1 3 Oil filter 4 Main axle 5 Drive axle 6 Crankshaft 2 - 34...

  • Page 61: Cable Routing

    SPEC CABLE ROUTING EAS00035 CABLE ROUTING 1 Left handlebar switch lead 0 Immobilizer unit lead 2 Clutch switch lead 3 Clutch cable 4 Front brake light switch lead 5 Right handlebar switch lead 6 Throttle cable 7 Headlight lead 8 Meter assembly lead 9 Main switch lead 2 - 35...

  • Page 62

    SPEC CABLE ROUTING È When fastening the front brake light switch lead, Ì Route the throttle cables, left handlebar switch leave some slack in the lead at the area shown. lead, right handlebar switch lead, front brake É Fasten the right handlebar switch lead, front light switch lead, and clutch switch lead in front brake light switch lead, and throttle cables with a of the steering column, then the clutch cable,...

  • Page 63

    SPEC CABLE ROUTING 1 Front turn signal light lead (right) È Fasten the sub-wire harness and meter assem- 2 Meter assembly lead bly lead with a plastic band. Fasten the sub-wire 3 Auxiliary light lead harness at the white tape. Face the end of the 4 Front turn signal light lead (left) plastic band forward.

  • Page 64

    SPEC CABLE ROUTING Ë Fasten the left and right front turn signal light Ï 0 ~ 5 mm (0 ~ 0.20 in) for both left and right leads to the headlight stay with a plastic locking sides tie. Ì Pass the left and right front turn signal light leads in front of the headlight stay.

  • Page 65

    SPEC CABLE ROUTING 1 Ignition coil lead B Fast idle plunger outlet hose 2 Main switch coupler 3 Immobilizer unit coupler È Fasten the fast idle plunger outlet hose and igni- 4 Air induction system lead tion coil leads with a hose holder. Install the 5 Horn lead hose holder with its fastener facing down.

  • Page 66

    SPEC CABLE ROUTING Ê Fasten the main switch lead, immobilizer unit Ì Fasten the clutch cable to the horn bracket with lead, and horn switch lead with a plastic locking a cable holder. Í Install the cable holder as high as possible. tie.

  • Page 67

    SPEC CABLE ROUTING 1 Rear brake light switch lead È Fasten the wire harness, negative battery lead, 2 Negative battery lead and rear brake light switch lead to the frame with 3 Lean angle cut-off switch lead a plastic locking tie. 4 Throttle position sensor lead É...

  • Page 68: Cable Routing

    SPEC CABLE ROUTING 1 Neutral switch connector 0 A.C. magneto lead K Immobilizer unit lead 2 Crankshaft position sensor A Oil tank breather hose L Clutch cable B Oil delivery hose 2 M Main switch lead coupler 3 A.C. magneto coupler C Radiator fan motor lead N Air-filter-to-air-cut-off-valve 4 Speed sensor lead...

  • Page 69

    SPEC CABLE ROUTING È Fasten the left handlebar switch lead, right han- É Fasten the left handlebar switch lead, right han- dlebar switch lead, headlight lead, meter assem- dlebar switch lead, headlight lead, meter assem- bly lead, front brake light switch lead, and clutch bly lead, front brake light switch lead, clutch switch lead to the frame with a plastic locking tie.

  • Page 70

    SPEC CABLE ROUTING Ë Fasten the wire harness to the frame at the Ï Fasten the neutral switch lead, crankshaft posi- white tape with a plastic locking tie. tion sensor lead, sidestand switch lead, speed Ì Fasten the starter motor lead to the frame with a sensor lead, starter motor lead, and A.C.

  • Page 71

    SPEC CABLE ROUTING Ò Fasten the wire harness, air-filter-to-air-cut-off- valve hose, and oil delivery hose 2 with a plastic clamp. Ó Fasten the left handlebar switch lead, right han- dlebar switch lead, headlight lead, meter assem- bly lead, front brake light switch lead, and clutch switch lead with a plastic band.

  • Page 72

    SPEC CABLE ROUTING 1 Starter motor lead È Fasten the wire harness and starter motor lead 2 Fuse box 1 lead to the frame with a plastic locking tie. 3 Fuse box 2 lead É 45° 4 Tail/brake light lead Ê...

  • Page 73

    SPEC CABLE ROUTING 1 Immobilizer unit coupler È 0 ~ 10 mm (0 ~ 0.39 in) 2 Intake air temperature sensor É 30 ~ 40 mm (1.18 ~ 1.57 in) 3 Fuel injector lead Ê 5 ~ 15 mm (0.20 ~ 0.59 in) 4 Fuel pump lead Ë...

  • Page 74

    SPEC CABLE ROUTING 1 Battery È Fasten the tail/brake light lead with two plastic 2 Negative battery lead locking ties so that the coupler is positioned to 3 Tail/brake light coupler the inside of where the relays (turn signal/hazard 4 Rear turn signal light connector relay, headlight relay, radiator fan motor relay, 5 Seat lock cable and relay unit) branch off from the wire harness.

  • Page 75

    SPEC CABLE ROUTING Ë Connect the couplers so that they are not pinched between the rear fender and rear fender cover. Ì Fasten the wire harness to the frame with a plas- tic locking tie. Í 0 ~ 5 mm (0 ~ 0.20 in) Î...

  • Page 76

    SPEC CABLE ROUTING 1 Front brake hose È To install the brake hose holders, align the edge 2 Front brake master cylinder of each holder with the upper edge of the recess 3 Front mud guard in the brake hose. 4 Front brake caliper É...

  • Page 77

    SPEC CABLE ROUTING Ì Route the front brake hose between the front fork and front mud guard and between the bosses on the front fork. Í When installing the brake hose onto the brake caliper, make sure that the brake pipe touches the brake caliper as shown.

  • Page 78

    SPEC CABLE ROUTING 1 Brake fluid reservoir È When installing the brake hose onto the brake 2 Brake fluid reservoir hose master cylinder, make sure that the brake pipe 3 Rear brake light switch touches the brake master cylinder as shown. 4 Rear brake master cylinder É...

  • Page 80

    CHAPTER 3 PERIODIC CHECKS AND ADJUSTMENTS INTRODUCTION....................3-1 PERIODIC MAINTENANCE AND LUBRICATION CHART ......3-1 COWLING AND COVER ................. 3-3 COVER...................... 3-3 COWLING ....................3-4 FUEL TANK..................... 3-5 REMOVING THE FUEL TANK ..............3-6 REMOVING THE FUEL PUMP ..............3-6 INSTALLING THE FUEL PUMP..............3-7 INSTALLING THE FUEL HOSE ..............3-7 AIR FILTER CASE ..................

  • Page 81

    CHASSIS ....................... 3-36 ADJUSTING THE REAR BRAKE PEDAL ..........3-36 CHECKING THE BRAKE FLUID LEVEL..........3-37 CHECKING THE FRONT AND REAR BRAKE PADS AND BRAKE PAD PINS .................3-38 ADJUSTING THE REAR BRAKE LIGHT SWITCH .........3-38 CHECKING THE FRONT AND REAR BRAKE HOSES......3-39 BLEEDING THE HYDRAULIC BRAKE SYSTEM ........

  • Page 82: Periodic Checks And Adjustments, Periodic Maintenance And Lubrication Chart

    • From 50,000 km, repeat the maintenance intervals starting from 10,000 km. • Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical skills. ODOMETER READING (× 1,000 km)

  • Page 83: Brake Fluid

    PERIODIC MAINTENANCE AND LUBRICATION CHART ODOMETER READING (× 1,000 km) ANNUAL ITEM CHECK OR MAINTENANCE JOB CHECK Chassis fasteners • Make sure that all nuts, bolts and screws are √ √ √ √ √ 15 * (See page 2-23) properly tightened. Sidestand •...

  • Page 84

    COWLING AND COVER COWLING AND COVER COVER 7 Nm (0.7 m kg, 5.1 ft • • 23 Nm (2.3 m kg, 17 ft • • 7 Nm (0.7 m kg, 5.1 ft • • Order Job/Part Q’ty Remarks Removing the cover Remove the parts in the order listed.

  • Page 85

    COWLING AND COVER COWLING 8 Nm (0.8 m kg, 5.8 ft • • 7 Nm (0.7 m kg, 5.1 ft • • Order Job/Part Q’ty Remarks Removing the cowling Remove the parts in the order listed. Seat/side panels (left and right) Refer to “COWLING AND COVER”.

  • Page 86: Fuel Tank

    FUEL TANK EAS00040 FUEL TANK 10 Nm (1.0 m kg, 7.2 ft • • Q’ty Remarks Order Job/Part Removing the fuel tank Remove the parts in the order listed. Seat/side panels (left and right) Refer to “COWLING AND COVER”. Fuel Drain.

  • Page 87

    FUEL TANK REMOVING THE FUEL TANK 1. Extract the fuel in the fuel tank through the fuel tank filler tube with a pump. 2. Remove: • fuel hose CAUTION: Although the fuel has been removed from the fuel tank be careful when removing the fuel hose, since there may be fuel remain- ing in it.

  • Page 88

    FUEL TANK INSTALLING THE FUEL PUMP 1. Install: • fuel pump 4 Nm (0.4 m · kg, 2.9 ft · lb) NOTE: • Do not damage the installation surfaces of the fuel tank when installing the fuel pump. • Always use a new fuel pump gasket. •...

  • Page 89: Air Filter Case

    AIR FILTER CASE AIR FILTER CASE REAR MUD GUARD AND REAR FENDER 7 Nm (0.7 m kg, 5.1 ft • • 7 Nm (0.7 m kg, 5.1 ft • • 7 Nm (0.7 m kg, 5.1 ft • • 7 Nm (0.7 m kg, 5.1 ft •...

  • Page 90

    AIR FILTER CASE 7 Nm (0.7 m kg, 5.1 ft • • 7 Nm (0.7 m kg, 5.1 ft • • 7 Nm (0.7 m kg, 5.1 ft • • 7 Nm (0.7 m kg, 5.1 ft • • Order Job/Part Q’ty Remarks...

  • Page 91

    AIR FILTER CASE EAS00043 AIR FILTER CASE 10 Nm (1.0 m kg, 7.2 ft • • 4 Nm (0.4 m kg, 2.9 ft • • 9 17 7 Nm (0.7 m kg, 5.1 ft • • 10 Nm (1.0 m kg, 7.2 ft •...

  • Page 92

    AIR FILTER CASE 10 Nm (1.0 m kg, 7.2 ft • • 4 Nm (0.4 m kg, 2.9 ft • • 9 17 7 Nm (0.7 m kg, 5.1 ft • • 10 Nm (1.0 m kg, 7.2 ft • •...

  • Page 93

    AIR FILTER CASE INSTALLING THE AIR FILTER CASE JOINT CLAMP 1. Install: • air filter case joint clamp 1 NOTE: To install the air filter case joint clamp, align its slot a with the projection b on the air filter case.

  • Page 94

    ADJUSTING THE VALVE CLEARANCE EAS00049 ENGINE ADJUSTING THE VALVE CLEARANCE The following procedure applies to all of the valves. NOTE: • Valve clearance adjustment should be made on a cold engine, at room temperature. • When the valve clearance is to be measured or adjusted, the piston must be at top dead center (TDC) on the compression stroke.

  • Page 95

    ADJUSTING THE VALVE CLEARANCE 6. Measure: • valve clearance Out of specification → Adjust. Valve clearance (cold) Intake valve 0.09 ~ 0.13 mm (0.0035 ~ 0.0051 in) Exhaust valve 0.16 ~ 0.20 mm (0.0063 ~ 0.0079 in) M MMM M MMM M MMM M MMM M MMM...

  • Page 96: Adjusting The Valve Clearance

    ADJUSTING THE VALVE CLEARANCE d. Hold the adjusting screw to prevent it from moving and tighten the locknut to the speci- fied torque. Locknut 14 Nm (1.4 m · kg, 10 ft · lb) e. Measure the valve clearance again. f.

  • Page 97

    ADJUSTING THE EXHAUST GAS VOLUME EAS00869 ADJUSTING THE EXHAUST GAS VOLUME NOTE: Be sure to set the CO density level to stan- dard, and then adjust the exhaust gas volume. 1. Turn the main switch to “OFF” and set the engine stop switch to “...

  • Page 98: Adjusting The Throttle Cable Free Play

    ADJUSTING THE ENGINE IDLING SPEED/ ADJUSTING THE THROTTLE CABLE FREE PLAY EAS00054 ADJUSTING THE ENGINE IDLING SPEED NOTE: Prior to adjusting the engine idling speed, the air filter element should be cleaned, and the engine should have adequate compression. 1. Start the engine and let it warm up for sev- eral minutes.

  • Page 99

    ADJUSTING THE THROTTLE CABLE FREE PLAY 1. Check: • throttle cable free play a Out of specification → Adjust. Throttle cable free play (at the flange of the throttle grip) 3.0 ~ 5.0 mm (0.12 ~ 0.20 in) 2. Adjust: •...

  • Page 100

    ADJUSTING THE THROTTLE CABLE FREE PLAY/ CHECKING THE SPARK PLUG c. Tighten the locknut. WARNING After adjusting the throttle cable free play, start the engine and turn the handlebars to the right and to the left to ensure that this does not cause the engine idling speed to change.

  • Page 101

    CHECKING THE SPARK PLUG/ CHECKING THE IGNITION TIMING 7. Install: • spark plug 13 Nm (1.3 m · kg, 9.4 ft · lb) NOTE: Before installing the spark plug, clean the spark plug and gasket surface. 8. Connect: • spark plug cap EAS00064 CHECKING THE IGNITION TIMING NOTE:...

  • Page 102: Checking The Ignition Timing, Measuring The Compression Pressure

    CHECKING THE IGNITION TIMING/ MEASURING THE COMPRESSION PRESSURE 4. Detach: • timing light 5. Install: • timing mark accessing screw EAS00067 MEASURING THE COMPRESSION PRESSURE NOTE: Insufficient compression pressure will result in a loss of performance. 1. Measure: • valve clearance Out of specification →...

  • Page 103: Measuring The Compression Pressure

    MEASURING THE COMPRESSION PRESSURE 6. Measure: • compression pressure Out of specification → Refer to steps (c) and (d). Compression pressure (at sea level) Minimum 600 kPa (6.0 kg/cm , 85.3 psi) Standard 650 kPa (6.5 kg/cm , 92.4 psi) Maximum 700 kPa (7.0 kg/cm , 99.6 psi)

  • Page 104: Checking The Engine Oil Level

    MEASURING THE COMPRESSION PRESSURE/ CHECKING THE ENGINE OIL LEVEL 7. Install: • spark plug 13 Nm (1.3 m · kg, 9.4 ft · lb) 8. Connect: • spark plug cap EAS00069 CHECKING THE ENGINE OIL LEVEL 1. Stand the motorcycle on a level surface. NOTE: •...

  • Page 105

    CHECKING THE ENGINE OIL LEVEL/ CHANGING THE ENGINE OIL 4. Start the engine, warm it up for several min- utes, and then turn it off. 5. Check the engine oil level again. NOTE: Before checking the engine oil level, wait a few minutes until the oil has settled.

  • Page 106

    CHANGING THE ENGINE OIL 9. If the oil filter element is also to be replaced, perform the following procedure. M MMM M MMM M MMM M MMM M MMM a. Remove the oil filter element cover 1 and oil filter element 2. b.

  • Page 107

    CHANGING THE ENGINE OIL 13.Install: • engine oil filler cap • camshaft sprocket cover 10 Nm (1.0 m · kg, 7.2 ft · lb) 14.Start the engine, warm it up for several min- utes, and then turn it off. 15.Check: •...

  • Page 108

    ADJUSTING THE CLUTCH CABLE FREE PLAY EAS00078 ADJUSTING THE CLUTCH CABLE FREE PLAY 1. Check: • clutch cable free play a Out of specification → Adjust. Clutch cable free play (at the end of the clutch lever) 10.0 ~ 15.0 mm (0.39 ~ 0.59 in) 2.

  • Page 109

    CHECKING THE AIR FILTER ELEMENT EAS00086 CHECKING THE AIR FILTER ELEMENT NOTE: There is a check hose 1 at the bottom of the air filter case. If dust and/or water collects in this hose, clean the air filter element and air fil- ter case.

  • Page 110

    CHECKING THE AIR FILTER ELEMENT/ CHECKING THE THROTTLE BODY JOINT/ CHECKING THE FUEL HOSE 6. Install: • right side panel • seat Refer to “COWLING AND COVER”. EAS00094 CHECKING THE THROTTLE BODY JOINT 1. Check: • throttle body joint 1 Cracks/damage →...

  • Page 111

    CHECKING THE BREATHER HOSE/ CHECKING THE EXHAUST SYSTEM EAS00098 CHECKING THE BREATHER HOSE 1. Check: • crankcase-to-crankcase-breather-chamber hose 1 • air-filter-to-crankcase-breather-chamber hose 2 Cracks/damage → Replace. Loose connection → Connect properly. CAUTION: Make sure the breather hoses are routed correctly. EAS00099 CHECKING THE EXHAUST SYSTEM The following procedure applies to all of the...

  • Page 112

    CHECKING THE COOLANT LEVEL/ CHECKING THE COOLING SYSTEM EAS00102 CHECKING THE COOLANT LEVEL 1. Stand the motorcycle on a level surface. NOTE: • Place the motorcycle on a suitable stand. • Make sure the motorcycle is upright. 2. Check: • coolant level The coolant level should be between the maximum level mark a and minimum level mark b.

  • Page 113

    CHECKING THE COOLING SYSTEM/ CHANGING THE COOLANT 2. Check: • radiator 1 • radiator outlet hose 2 • radiator inlet hose 3 • water pump assembly 4 • water pump outlet pipe 5 • water pump outlet hose 6 Cracks/damage → Replace. Refer to “COOLING SYSTEM”...

  • Page 114

    CHANGING THE COOLANT 2. Remove: • radiator cap retainer 1 • radiator cap 2 WARNING A hot radiator is under pressure. Therefore, do not remove the radiator cap when the engine is hot. Scalding hot fluid and steam may be blown out, which could cause seri- ous injury.

  • Page 115

    CHANGING THE COOLANT 10.Fill: • cooling system (with the specified amount of the recom- mended coolant) Recommended antifreeze High-quality ethylene glycol antifreeze containing corrosion inhibitors for aluminum engines Mixing ratio 1:1 (antifreeze:water) Quantity Total amount 1.00 L (0.88 Imp qt, 1.06 US qt) Coolant reservoir capacity 0.25 L (0.22 Imp qt, 0.26 US qt) From minimum to maximum...

  • Page 116

    CHANGING THE COOLANT 11.Install: • radiator cap • radiator cap retainer 7 Nm (0.7 m · kg, 5.1 ft · lb) 12.Fill: • coolant reservoir (with the recommended coolant to the maxi- mum level mark a) 13.Install: • coolant reservoir cap 14.Start the engine, warm it up for several min- utes, and then turn it off.

  • Page 117

    ADJUSTING THE REAR BRAKE PEDAL EAS00110 CHASSIS ADJUSTING THE REAR BRAKE PEDAL 1. Check: • brake pedal position (distance a from the top of the rider foot- rest to the top of the brake pedal) Out of specification → Adjust. Brake pedal position (below the top of the rider footrest) 12.0 mm (0.47 in)

  • Page 118

    ADJUSTING THE REAR BRAKE PEDAL/ CHECKING THE BRAKE FLUID LEVEL 3. Adjust: • rear brake light switch Refer to “ADJUSTING THE REAR BRAKE LIGHT SWITCH”. EAS00115 CHECKING THE BRAKE FLUID LEVEL 1. Stand the motorcycle on a level surface. NOTE: •...

  • Page 119

    PADS” in chapter 4. Rear brake pad wear limit 1.0 mm (0.04 in) 4. Check: • brake pad pins Damage/wear → Replace. È Front brake (XT660R) É Front brake (XT660X) Ê Rear brake (XT660R/XT660X) EAS00128 ADJUSTING THE REAR BRAKE LIGHT SWITCH...

  • Page 120

    ADJUSTING THE REAR BRAKE LIGHT SWITCH/ CHECKING THE FRONT AND REAR BRAKE HOSES 1. Check: • rear brake light operation timing Incorrect → Adjust. 2. Adjust: • rear brake light operation timing M MMM M MMM M MMM M MMM M MMM a.

  • Page 121

    Install the diaphragm (brake master cylinder reservoir or brake fluid reservoir). c. Connect a clear plastic hose 1 tightly to the bleed screw 2. È Front (XT660R) É Front (XT660X) Ê Rear (XT660R/XT660X) d. Place the other end of the hose into a con- tainer.

  • Page 122

    BLEEDING THE HYDRAULIC BRAKE SYSTEM/ ADJUSTING THE SHIFT PEDAL g. Loosen the bleed screw. NOTE: Loosening the bleed screw will release the pressure and cause the brake lever to contact the throttle grip or the brake pedal to fully extend. h.

  • Page 123

    ADJUSTING THE SHIFT PEDAL/ ADJUSTING THE DRIVE CHAIN SLACK 2. Adjust: • shift pedal position M MMM M MMM M MMM M MMM M MMM a. Remove the bolt 1. b. Remove the shift pedal 2. c. Install the shift pedal at the correct position. d.

  • Page 124

    ADJUSTING THE DRIVE CHAIN SLACK 3. Check: • drive chain slack a Out of specification → Adjust. Drive chain slack 40.0 ~ 55.0 mm (1.57 ~ 2.17 in) 4. Adjust: • drive chain slack M MMM M MMM M MMM M MMM M MMM a.

  • Page 125: Lubricating The Drive Chain

    LUBRICATING THE DRIVE CHAIN/ CHECKING AND ADJUSTING THE STEERING HEAD EAS00142 LUBRICATING THE DRIVE CHAIN The drive chain consists of many interacting parts. If the drive chain is not maintained prop- erly, it will wear out quickly. Therefore, the drive chain should be serviced, especially when the motorcycle is used in dusty areas.

  • Page 126

    CHECKING AND ADJUSTING THE STEERING HEAD 3. Remove: • handlebar protector cover (XT660X) • handlebar protector (XT660X) • handlebar holder caps • upper handlebar holders 1 • handlebar 2 4. Loosen: • upper bracket pinch bolts 1 5. Remove: • steering stem nut 2 •...

  • Page 127

    CHECKING AND ADJUSTING THE STEERING HEAD/ CHECKING THE FRONT FORK d. Check the steering head for looseness or binding by turning the front fork all the way in both directions. If any binding is felt, remove the lower bracket and check the upper and lower bearings.

  • Page 128

    CHECKING THE FRONT FORK/ADJUSTING THE REAR SHOCK ABSORBER ASSEMBLY 3. Hold the motorcycle upright and apply the front brake. 4. Check: • front fork operation Push down hard on the handlebar several times and check if the front fork rebounds smoothly.

  • Page 129: Checking The Tires

    • Operation of an overloaded motorcycle could cause tire damage, an accident or an injury. NEVER OVERLOAD THE MOTORCYCLE. XT660R Basic weight (with oil and a 181.0 kg (399 lb) full fuel tank) Maximum 186.0 kg (410 lb)

  • Page 130

    CHECKING THE TIRES XT660X Basic weight (with oil and a 186.0 kg (410 lb) full fuel tank) Maximum 186.0 kg (410 lb) load* Cold tire Front Rear pressure 210 kPa 210 kPa Up to 90 kg (2.10 kgf/cm (2.10 kgf/cm load* 30 psi) 30 psi)

  • Page 131

    Tube or tubeless Tubeless wheel tire • After extensive tests, the tires listed below have been approved by Yamaha Motor Co., Ltd. for this model. The front and rear tires should always be by the same manufacturer and of the same design.

  • Page 132

    CHECKING THE TIRES/ CHECKING AND TIGHTENING THE SPOKES WARNING New tires have a relatively low grip on the road surface until they have been slightly worn. Therefore, approximately 100 km should be traveled at normal speed before any high-speed riding is done. NOTE: For tires with a direction of rotation mark 1: •...

  • Page 133

    CHECKING AND LUBRICATING THE CABLES/ LUBRICATING THE LEVERS AND BRAKE PEDAL/ LUBRICATING THE SIDESTAND EAS00170 CHECKING AND LUBRICATING THE CABLES The following procedure applies to all of the inner and outer cables. WARNING Damaged outer cable may cause the cable to corrode and interfere with its movement.

  • Page 134

    CHECKING AND CHARGING THE BATTERY EAS00178 ELECTRICAL SYSTEM CHECKING AND CHARGING THE BATTERY WARNING Batteries generate explosive hydrogen gas and contain electrolyte which is made of poisonous and highly caustic sulfuric acid. Therefore, always follow these preventive measures: • Wear protective eye gear when handling or working near batteries.

  • Page 135

    CHECKING AND CHARGING THE BATTERY NOTE: Since MF batteries are sealed, it is not possi- ble to check the charge state of the battery by measuring the specific gravity of the electro- lyte. Therefore, the charge of the battery has to be checked by measuring the voltage at the battery terminals.

  • Page 136

    CHECKING AND CHARGING THE BATTERY 5. Charge: Charging Ambient temperature • battery (refer to the appropriate charging method illustration) WARNING Do not quick charge a battery. Time (minutes) Check the open-circuit CAUTION: voltage. • Never remove the MF battery sealing caps.

  • Page 137

    CHECKING AND CHARGING THE BATTERY Charging method using a variable-current (voltage) charger Charger Ammeter NOTE: Measure the open-circuit Leave the battery unused for voltage prior to charging. more than 30 minutes before measuring its open-circuit voltage. Connect a charger and NOTE: Set the charging voltage to 16 ~ ammeter to the battery and...

  • Page 138

    CHECKING AND CHARGING THE BATTERY Charging method using a constant voltage charger NOTE: Measure the open-circuit Leave the battery unused for voltage prior to charging. more than 30 minutes before measuring its open-circuit voltage. Connect a charger and ammeter to the battery and start charging.

  • Page 139

    CHECKING AND CHARGING THE BATTERY/ CHECKING THE FUSES 6. Install: • battery 7. Connect: • battery leads (to the battery terminals) CAUTION: First, connect the positive battery lead 1, then the negative battery lead 2. 8. Check: • battery terminals Dirt →...

  • Page 140

    CHECKING THE FUSES 2. Check: • fuse 1 • fuse box 1 2 • fuse box 2 3 M MMM M MMM M MMM M MMM M MMM a. Connect the pocket tester to the fuse and check the continuity. NOTE: Set the pocket tester selector to “Ω...

  • Page 141

    CHECKING THE FUSES/ REPLACING THE HEADLIGHT BULB WARNING Never use a fuse with an amperage rating other than that specified. Improvising or using a fuse with the wrong amperage rat- ing may cause extensive damage to the electrical system, cause the lighting and ignition systems to malfunction and could possibly cause a fire.

  • Page 142

    REPLACING THE HEADLIGHT BULB/ ADJUSTING THE HEADLIGHT BEAM 5. Install: • headlight bulb • headlight bulb holder • headlight bulb holder cover CAUTION: Avoid touching the glass part of the head- light bulb to keep it free from oil, otherwise the transparency of the glass, the life of the bulb and the luminous flux will be adversely affected.

  • Page 143

    SETTING THE DIGITAL CLOCK EAS00187 SETTING THE DIGITAL CLOCK 1. Set: • digital clock 1 M MMM M MMM M MMM M MMM M MMM a. Set the main switch to “ON”. b. Push the “SELECT” button 2 and “RESET” button 3 together for at least two seconds.

  • Page 144

    CHAS...

  • Page 145

    CHECKING AND REPLACING THE REAR WHEEL SPROCKET ..4-17 INSTALLING THE REAR WHEEL............4-17 ADJUSTING THE REAR WHEEL STATIC BALANCE......4-18 FRONT AND REAR BRAKES............... 4-19 FRONT BRAKE PADS (XT660R)............4-19 FRONT BRAKE PADS (XT660X)............4-20 REAR BRAKE PADS................4-21 REPLACING THE FRONT BRAKE PADS ..........4-22 REPLACING THE REAR BRAKE PADS..........

  • Page 146

    CHAS FRONT FORK....................4-51 REMOVING THE FRONT FORK LEGS..........4-55 DISASSEMBLING THE FRONT FORK LEGS ........4-55 CHECKING THE FRONT FORK LEGS ..........4-57 ASSEMBLING THE FRONT FORK LEGS ..........4-58 INSTALLING THE FRONT FORK LEGS ..........4-62 HANDLEBAR ....................4-63 REMOVING THE HANDLEBAR..............4-65 CHECKING THE HANDLEBAR ..............4-65 INSTALLING THE HANDLEBAR ............

  • Page 147

    CHAS FRONT WHEEL AND BRAKE DISC EAS00512 CHASSIS FRONT WHEEL AND BRAKE DISC 18 Nm (1.8 m kg, 13 ft • • 59 Nm (5.9 m kg, 43 ft • • 40 Nm (4.0 m kg, 29 ft • • 23 Nm (2.3 m kg, 17 ft •...

  • Page 148: Front Wheel And Brake Disc

    CHAS FRONT WHEEL AND BRAKE DISC EAS00518 FRONT WHEEL Order Job/Part Q’ty Remarks Disassembling the front wheel Remove the parts in the order listed. Oil seal Bearing Spacer For assembly, reverse the disassembly procedure. 4 - 2...

  • Page 149

    CHAS FRONT WHEEL AND BRAKE DISC EAS00519 REMOVING THE FRONT WHEEL 1. Stand the motorcycle on a level surface. WARNING Securely support the motorcycle so that there is no danger of it falling over. NOTE: Place the motorcycle on a suitable stand so that the front wheel is elevated.

  • Page 150

    CHAS FRONT WHEEL AND BRAKE DISC 3. Check: • spokes Bends/damage → Replace. Loose → Tighten. Tap the spokes with a screwdriver. NOTE: A tight spoke will emit a clear, ringing tone, a loose spoke will sound flat. 4. Tighten: •...

  • Page 151

    CHAS FRONT WHEEL AND BRAKE DISC 7. Check: • wheel bearings Front wheel turns roughly or is loose → Replace the wheel bearings. • oil seals Damage/wear → Replace. 8. Replace: • oil seals • wheel bearings M MMM M MMM M MMM M MMM M MMM...

  • Page 152

    CHAS FRONT WHEEL AND BRAKE DISC EAS00527 CHECKING THE FRONT BRAKE DISC 1. Check: • brake disc Damage/galling → Replace. 2. Measure: • brake disc deflection Out of specification → Correct the brake disc deflection or replace the brake disc. Brake disc deflection limit (maxi- mum) 0.15 mm (0.006 in)

  • Page 153

    CHAS FRONT WHEEL AND BRAKE DISC 4. Adjust: • brake disc deflection M MMM M MMM M MMM M MMM M MMM a. Remove the brake disc. b. Rotate the brake disc by one bolt hole. c. Install the brake disc. NOTE: Tighten the brake disc bolts in stages and in a crisscross pattern.

  • Page 154

    CHAS FRONT WHEEL AND BRAKE DISC 2. Tighten: • wheel axle 1 59 Nm (5.9 m · kg, 43 ft · lb) • wheel axle pinch bolts 2 18 Nm (1.8 m · kg, 13 ft · lb) CAUTION: Before tightening the wheel axle nut, push down hard on the handlebar several times and check if the front fork rebounds smoothly.

  • Page 155

    CHAS FRONT WHEEL AND BRAKE DISC 2. Find: • front wheel’s heavy spot NOTE: Place the front wheel on a suitable balancing stand. M MMM M MMM M MMM M MMM M MMM a. Spin the front wheel. b. When the front wheel stops, put an “X ”...

  • Page 156

    Remove the parts in the order listed. NOTE: Place the motorcycle on a suitable stand so that the rear wheel is elevated. Stabilizer XT660X Chain cover XT660X Chain cover XT660R Locknut Loosen. Adjusting nut Loosen. Wheel axle nut Washer (N) Refer to “INSTALLING THE REAR WHEEL”.

  • Page 157

    REAR WHEEL, BRAKE DISC, AND REAR WHEEL CHAS SPROCKET 105 Nm (10.5 m kg, 75 ft • • 7 Nm (0.7 m kg, 5.1 ft • • 16 Nm (1.6 m kg, 11 ft • • 7 Nm (0.7 m kg, 5.1 ft •...

  • Page 158

    REAR WHEEL, BRAKE DISC, AND REAR WHEEL CHAS SPROCKET BRAKE DISC AND REAR WHEEL SPROCKET 13 Nm (1.3 m kg, 9.4 ft • • 69 Nm (6.9 m kg, 50 ft • • Order Job/Part Q’ty Remarks Removing the brake disc and rear Remove the parts in the order listed.

  • Page 159

    REAR WHEEL, BRAKE DISC, AND REAR WHEEL CHAS SPROCKET Order Job/Part Q’ty Remarks Disassembling the rear wheel Remove the parts in the order listed. Bearing Oil seal Spacer For assembly, reverse the disassembly procedure. 4 - 13...

  • Page 160

    REAR WHEEL, BRAKE DISC, AND REAR WHEEL CHAS SPROCKET EAS00561 REMOVING THE REAR WHEEL 1. Stand the motorcycle on a level surface. WARNING Securely support the motorcycle so that there is no danger of it falling over. NOTE: Place the motorcycle on a suitable stand so that the rear wheel is elevated.

  • Page 161

    REAR WHEEL, BRAKE DISC, AND REAR WHEEL CHAS SPROCKET 2. Check: • tire • rear wheel Damage/wear → Replace. Refer to “CHECKING THE TIRES” in chap- ter 3. 3. Check: • spokes Refer “CHECKING FRONT WHEEL”. 4. Measure: • radial wheel runout •...

  • Page 162

    REAR WHEEL, BRAKE DISC, AND REAR WHEEL CHAS SPROCKET 3. Measure: • brake disc thickness Measure the brake disc thickness at a few different locations. Out of specification → Replace. Brake disc thickness limit (mini- mum) 4.5 mm (0.18 in) 4.

  • Page 163

    REAR WHEEL, BRAKE DISC, AND REAR WHEEL CHAS SPROCKET EAS00568 CHECKING AND REPLACING THE REAR WHEEL SPROCKET 1. Check: • rear wheel sprocket More than 1/4 tooth a wear → Replace the rear wheel sprocket. Bent teeth → Replace the rear wheel sprocket.

  • Page 164

    REAR WHEEL, BRAKE DISC, AND REAR WHEEL CHAS SPROCKET 2. Install: • rear wheel • washer (O) • rear axle • washer (N) • rear axle nut NOTE: Install the washer with the “N” mark on the right-hand side of the vehicle and the washer with the “O”...

  • Page 165

    CHAS FRONT AND REAR BRAKES EAS00577 FRONT AND REAR BRAKES FRONT BRAKE PADS (XT660R) 14 Nm (1.4 m kg, 10 ft • • 40 Nm (4.0 m kg, 29 ft • • Order Job/Part Q’ty Remarks Removing the front brake pads Remove the parts in the order listed.

  • Page 166

    CHAS FRONT AND REAR BRAKES FRONT BRAKE PADS (XT660X) 14 Nm (1.4 m kg, 10 ft • • 40 Nm (4.0 m kg, 29 ft • • Order Job/Part Q’ty Remarks Removing the front brake pads Remove the parts in the order listed. Brake caliper bolt Brake pad clip Brake pad pin...

  • Page 167

    CHAS FRONT AND REAR BRAKES EAS00578 REAR BRAKE PADS 14 Nm (1.4 m kg, 10 ft • • Order Job/Part Q’ty Remarks Removing the rear brake pads Remove the parts in the order listed. Rear wheel Refer to “REAR WHEEL, BRAKE DISC, AND REAR WHEEL SPROCKET”.

  • Page 168

    • brake caliper bolts 1 • brake caliper 2 • brake pad clip(s) 3 É • brake pad pin(s) 4 • brake pads 5 • brake pad springs (XT660R) • brake pad spring 6 (XT660X) È XT660R É XT660X 4 - 22...

  • Page 169

    È • brake pad wear limit a Out of specification → Replace the brake pads as a set. Brake pad wear limit 1.0 mm (0.04 in) È XT660R É XT660X 3. Check: É • brake pad pin(s) Damage/wear → Replace.

  • Page 170

    Install new brake pads and new brake pad È springs. NOTE: The arrow a on the brake pad spring must point in the direction of rotation. È XT660R É XT660X L LLL L LLL L LLL L LLL L LLL 5.

  • Page 171

    CHAS FRONT AND REAR BRAKES 3. Measure: • brake pad wear limit a Out of specification → Replace the brake pads as a set. Brake pad wear limit 1.0 mm (0.04 in) 4. Install: • brake pad springs • brake pads NOTE: Always replace the brake pads and brake pad springs as a set.

  • Page 172

    CHAS FRONT AND REAR BRAKES EAS00584 FRONT BRAKE MASTER CYLINDER 7 Nm (0.7 m kg, 5.1 ft • • 6 Nm (0.6 m kg, 4.3 ft • • 30 Nm (3.0 m kg, 22 ft • • Order Job/Part Q’ty Remarks Removing the front brake master Remove the parts in the order listed.

  • Page 173

    CHAS FRONT AND REAR BRAKES 7 Nm (0.7 m kg, 5.1 ft • • 6 Nm (0.6 m kg, 4.3 ft • • 30 Nm (3.0 m kg, 22 ft • • Order Job/Part Q’ty Remarks Front brake light switch Disconnect.

  • Page 174: Front And Rear Brakes

    CHAS FRONT AND REAR BRAKES EAS00585 Order Job/Part Q’ty Remarks Disassembling the front brake mas- Remove the parts in the order listed. ter cylinder Dust boot Circlip Brake master cylinder kit Brake master cylinder For assembly, reverse the disassembly procedure. 4 - 28...

  • Page 175

    CHAS FRONT AND REAR BRAKES EAS00586 REAR BRAKE MASTER CYLINDER 30 Nm (3.0 m kg, 22 ft • • 18 Nm (1.8 m kg, 13 ft • • 23 Nm (2.3 m kg, 17 ft • • Order Job/Part Q’ty Remarks Removing the rear brake master cyl- Remove the parts in the order listed.

  • Page 176

    CHAS FRONT AND REAR BRAKES 30 Nm (3.0 m kg, 22 ft • • 18 Nm (1.8 m kg, 13 ft • • 23 Nm (2.3 m kg, 17 ft • • Order Job/Part Q’ty Remarks Cotter pin Washer Refer to “INSTALLING THE REAR BRAKE MASTER CYLINDER”.

  • Page 177

    CHAS FRONT AND REAR BRAKES EAS00587 Order Job/Part Q’ty Remarks Disassembling the rear brake mas- Remove the parts in the order listed. ter cylinder Hose joint Brake master cylinder kit Refer to “ASSEMBLING THE REAR Brake master cylinder BRAKE MASTER CYLINDER”. For assembly, reverse the disassembly procedure.

  • Page 178

    CHAS FRONT AND REAR BRAKES EAS00588 DISASSEMBLING THE FRONT BRAKE MASTER CYLINDER NOTE: Before disassembling the front brake master cylinder, drain the brake fluid from the entire brake system. 1. Disconnect: • front brake light switch 1 NOTE: Push the fastener to remove the front brake light switch from the brake master cylinder.

  • Page 179

    CHAS FRONT AND REAR BRAKES EAS00592 È CHECKING THE FRONT AND REAR BRAKE MASTER CYLINDERS The following procedure applies to both of the brake master cylinders. 1. Check: • brake master cylinder 1 Damage/scratches/wear → Replace. • brake fluid delivery passages (brake master cylinder body) Obstruction →...

  • Page 180

    CHAS FRONT AND REAR BRAKES 5. Check: • brake hoses Cracks/damage/wear → Replace. EAS00598 ASSEMBLING AND INSTALLING THE FRONT BRAKE MASTER CYLINDER WARNING • Before installation, all internal brake com- ponents should be cleaned and lubricated with clean or new brake fluid. •...

  • Page 181

    CHAS FRONT AND REAR BRAKES 3. Fill: • brake master cylinder reservoir (with the specified amount of the recom- mended brake fluid) Recommended brake fluid DOT 4 WARNING • Use only the designated brake fluid. Other brake fluids may cause the rubber seals to deteriorate, causing leakage and poor brake performance.

  • Page 182

    CHAS FRONT AND REAR BRAKES EAS00608 ASSEMBLING THE REAR BRAKE MASTER CYLINDER WARNING • All internal brake components should be cleaned and lubricated with new brake fluid only before installation. Recommended brake fluid DOT 4 • Whenever a master cylinder is disassem- bled, replace the piston seals and dust seals.

  • Page 183

    CHAS FRONT AND REAR BRAKES 2. Install: • right side heel plate 23 Nm (2.3 m · kg, 17 ft · lb) • copper washers • brake hose 1 • union bolt 2 30 Nm (3.0 m · kg, 22 ft · lb) WARNING Proper brake hose routing is essential to insure safe motorcycle operation.

  • Page 184

    CHAS FRONT AND REAR BRAKES 4. Bleed: • brake system Refer to “BLEEDING THE HYDRAULIC BRAKE SYSTEM” in chapter 3. 5. Check: • brake fluid level Below the minimum level mark a → Add the recommended brake fluid to the proper level.

  • Page 185

    CHAS FRONT AND REAR BRAKES EAS00612 FRONT BRAKE CALIPER (XT660R) 40 Nm (4.0 m kg, 29 ft • • 30 Nm (3.0 m kg, 22 ft • • Order Job/Part Q’ty Remarks Removing the front brake caliper Remove the parts in the order listed.

  • Page 186

    CHAS FRONT AND REAR BRAKES EAS00614 14 Nm (1.4 m kg, 10 ft • • Order Job/Part Q’ty Remarks Disassembling the front brake cali- Remove the parts in the order listed. Brake pad clip Brake pad pin Refer to “INSTALLING THE FRONT Brake pad BRAKE CALIPER”.

  • Page 187

    CHAS FRONT AND REAR BRAKES FRONT BRAKE CALIPER (XT660X) 30 Nm (3.0 m kg, 22 ft • • 40 Nm (4.0 m kg, 29 ft • • Order Job/Part Q’ty Remarks Removing the front brake caliper Remove the parts in the order listed. Brake fluid Drain.

  • Page 188

    CHAS FRONT AND REAR BRAKES 14 Nm (1.4 m kg, 10 ft • • Order Job/Part Q’ty Remarks Disassembling the front brake cali- Remove the parts in the order listed. Brake pad clip Brake pad pin Refer to “INSTALLING THE FRONT Brake pad spring BRAKE CALIPER”.

  • Page 189

    CHAS FRONT AND REAR BRAKES EAS00616 REAR BRAKE CALIPER 30 Nm (3.0 m kg, 22 ft • • 7 Nm (0.7 m kg, 5.1 ft • • 4 Nm (0.4 m kg, 2.9 ft • • Order Job/Part Q’ty Remarks Removing the rear brake caliper Remove the parts in the order listed.

  • Page 190

    CHAS FRONT AND REAR BRAKES EAS00617 14 Nm (1.4 m kg, 10 ft • • Order Job/Part Q’ty Remarks Disassembling the rear brake cali- Remove the parts in the order listed. Brake caliper bracket Brake pad clip Brake pad pin Refer to “INSTALLING THE REAR BRAKE CALIPER”.

  • Page 191

    • brake caliper 4 É NOTE: Put the end of the brake hose into a container and pump out the brake fluid carefully. È XT660R É XT660X EAS00626 REMOVING THE REAR BRAKE CALIPER NOTE: Before removing the brake caliper, drain the brake fluid from the entire brake system.

  • Page 192

    • brake caliper body 2 Cracks/damage → Replace the brake cali- per. • brake caliper Brake fluid leakage → Replace the brake caliper. È Front (XT660R) É É Front (XT660X) Ê Rear (XT660R/XT660X) 2. Check: • brake caliper bracket Cracks/damage → Replace.

  • Page 193

    XT660X When installing the brake hose onto the brake caliper 1, make sure the brake pipe È a touches the projection c on the brake caliper. È XT660R É XT660X É 4 - 47...

  • Page 194

    CHAS FRONT AND REAR BRAKES 3. Fill: • brake master cylinder reservoir (with the specified amount of the recom- mended brake fluid) Recommended brake fluid DOT 4 WARNING • Use only the designated brake fluid. Other brake fluids may cause the piston seals to deteriorate, causing leakage and poor brake performance.

  • Page 195

    CHAS FRONT AND REAR BRAKES EAS00642 INSTALLING THE REAR BRAKE CALIPER 1. Install: • brake caliper springs • brake pads • brake pad pin • brake pad clip Refer to “REAR BRAKE PADS”. 2. Install: • brake caliper • rear wheel Refer to “REAR WHEEL, BRAKE DISC, AND REAR WHEEL SPROCKET”.

  • Page 196

    CHAS FRONT AND REAR BRAKES WARNING • Use only the designated brake fluid. Other brake fluids may cause the piston seals to deteriorate, causing leakage and poor brake performance. • Refill with the same type of brake fluid that is already in the system. Mixing brake fluids may result in a harmful chemical reaction, leading to poor brake performance.

  • Page 197: Front Fork

    Refer to “COWLING AND COVER” in Front fork protector chapter 3. Front cowling assembly Front wheel Refer to “FRONT WHEEL AND BRAKE DISC”. Front mud guard XT660R Front mud guard stay XT660R Stabilizer XT660X Front mud guard XT660X Brake hose holder Refer to “INSTALLING THE FRONT...

  • Page 198

    Loosen. Refer to “REMOVING THE FRONT FORK Cap bolt Loosen. LEGS” and “INSTALLING Lower bracket pinch bolt Loosen. THE FRONT FORK LEGS”. Front fork leg XT660R Front fork leg XT660X For installation, reverse the removal pro- cedure. 4 - 52...

  • Page 199

    CHAS FRONT FORK EAS00648 18 Nm (1.8 m kg, 13 ft • • 30 Nm (3.0 m kg, 22 ft • • Order Job/Part Q’ty Remarks Disassembling the front fork legs Remove the parts in the order listed. NOTE: The following the procedure applies to both of the front fork legs.

  • Page 200

    • • Order Job/Part Q’ty Remarks Oil seal Washer Refer to “ASSEMBLING THE FRONT Outer tube bushing FORK LEGS”. Oil flow stopper Inner tube bushing Outer tube XT660R Outer tube XT660X For assembly, reverse the disassembly procedure. 4 - 54...

  • Page 201

    CHAS FRONT FORK EAS00649 REMOVING THE FRONT FORK LEGS The following procedure applies to both of the front fork legs. 1. Stand the motorcycle on a level surface. WARNING Securely support the motorcycle so that there is no danger of it falling over. NOTE: Place the motorcycle on a suitable stand so that the front wheel is elevated.

  • Page 202

    CHAS FRONT FORK 2. Drain: • fork oil NOTE: Stroke the outer tube several times while draining the fork oil. 3. Remove: • dust seal 1 • oil seal clip 2 (with a flat-head screwdriver) CAUTION: Do not scratch the inner tube. 4.

  • Page 203

    • outer tube 2 Bends/damage/scratches → Replace. WARNING Do not attempt to straighten a bent inner É tube as this may dangerously weaken it. È XT660R É XT660X 2. Measure: • spring free length a Out of specification → Replace. Spring free length XT660R 633.0 mm (24.92 in)

  • Page 204: Assembling Front Fork Legs

    CHAS FRONT FORK 3. Check: • damper rod 1 Damage/wear → Replace. Obstruction → Blow out all of the oil pas- sages with compressed air. • oil flow stopper 2 Damage → Replace. CAUTION: • The front fork leg has a built-in damper adjusting rod and a very sophisticated internal construction, which are particu- larly sensitive to foreign material.

  • Page 205

    CHAS FRONT FORK 2. Lubricate: • inner tube’s outer surface Recommended lubricant Fork oil 10 W or equivalent 3. Tighten: • damper rod bolt 1 Damper rod bolt 30 Nm (3.0 m · kg, 22 ft · lb) ® LOCTITE NOTE: While holding the damper rod with the damper rod holder 2 and T-handle 3, tighten the...

  • Page 206

    CHAS FRONT FORK 5. Install: • oil seal 1 (with the fork seal driver weight 2 and fork seal driver attachment 3) CAUTION: Make sure the numbered side of the oil seal faces up. NOTE: • Before installing the oil seal, lubricate its lips with lithium-soap-based grease.

  • Page 207

    FRONT FORK 8. Fill: • front fork leg (with the specified amount of the recom- mended fork oil) Quantity (each front fork leg) XT660R 640.0 cm (22.53 Imp oz, 21.64 US oz) XT660X 600.0 cm (21.12 Imp oz, 20.29 US oz)

  • Page 208

    CHAS FRONT FORK EAS00662 INSTALLING THE FRONT FORK LEGS The following procedure applies to both of the front fork legs. 1. Install: • front fork leg Temporarily tighten the lower bracket pinch bolts. NOTE: To install the front fork leg, align the inner tube a with the lower edge b of the bevel on the upper bracket as shown.

  • Page 209

    CHAS HANDLEBAR EAS00664 HANDLEBAR 7 Nm (0.7 m kg, 5.1 ft • • 23 Nm (2.3 m kg, 17 ft • • 7 Nm (0.7 m kg, 5.1 ft • • 7 Nm (0.7 m kg, 5.1 ft • • Order Job/Part Q’ty...

  • Page 210

    CHAS HANDLEBAR 7 Nm (0.7 m kg, 5.1 ft • • 23 Nm (2.3 m kg, 17 ft • • 7 Nm (0.7 m kg, 5.1 ft • • 7 Nm (0.7 m kg, 5.1 ft • • Order Job/Part Q’ty Remarks Clutch lever...

  • Page 211

    CHAS HANDLEBAR EAS00666 REMOVING THE HANDLEBAR 1. Stand the motorcycle on a level surface. WARNING Securely support the motorcycle so that there is no danger of it falling over. 2. Remove: • front brake light switch 1 • clutch switch NOTE: •...

  • Page 212

    CHAS HANDLEBAR 2. Install: • handlebar 1 • upper handlebar holders 2 23 Nm (2.3 m · kg, 17 ft · lb) • handlebar protector (XT660X) • handlebar protector cover (XT660X) CAUTION: • First, tighten the bolts on the front side of the upper handlebar holder, then the bolts on the rear side.

  • Page 213

    CHAS HANDLEBAR 4. Install: • left handlebar switch 1 NOTE: Align the projection a on the left handlebar switch with the hole b in the handlebar. 5. Install: • clutch lever • clutch lever holder 1 7 Nm (0.7 m · kg, 5.1 ft · lb) NOTE: Align the mating surfaces of the clutch lever holder with the punch mark a on the handle-...

  • Page 214

    CHAS HANDLEBAR 8. Install: • brake master cylinder • brake master cylinder holder Refer to “FRONT AND REAR BRAKES”. 9. Adjust: • clutch cable free play Refer to “ADJUSTING THE CLUTCH CABLE FREE PLAY” in chapter 3. Clutch cable free play (at the end of the clutch lever) 10.0 ~ 15.0 mm (0.39 ~ 0.59 in) 10.Adjust:...

  • Page 215: Steering Head

    CHAS STEERING HEAD EAS00675 STEERING HEAD LOWER BRACKET 32 Nm (3.2 m kg, 23 ft 130 Nm (13.0 m kg, 94 ft • • • • 23 Nm (2.3 m kg, 17 ft • • 23 Nm (2.3 m kg, 17 ft •...

  • Page 216

    CHAS STEERING HEAD 32 Nm (3.2 m kg, 23 ft 130 Nm (13.0 m kg, 94 ft • • • • 23 Nm (2.3 m kg, 17 ft • • 23 Nm (2.3 m kg, 17 ft • • 32 Nm (3.2 m kg, 23 ft •...

  • Page 217

    CHAS STEERING HEAD EAS00679 REMOVING THE LOWER BRACKET 1. Stand the motorcycle on a level surface. WARNING Securely support the motorcycle so that there is no danger of it falling over. 2. Remove: • upper ring nut 1 • rubber washer •...

  • Page 218

    CHAS STEERING HEAD 3. Replace: • bearings • bearing races M MMM M MMM M MMM M MMM M MMM a. Remove the bearing races from the steering head pipe with a long rod 1 and hammer. b. Remove the bearing race from the lower bracket with a floor chisel 2 and hammer.

  • Page 219

    CHAS STEERING HEAD 3. Install: • upper bracket • steering stem nut NOTE: Temporarily tighten the steering stem nut. 4. Install: • front fork legs Refer to “INSTALLING THE FRONT FORK LEGS”. NOTE: Temporarily tighten the lower bracket pinch bolts. 5.

  • Page 220: Rear Shock Absorber Assembly

    CHAS REAR SHOCK ABSORBER ASSEMBLY EAS00685 REAR SHOCK ABSORBER ASSEMBLY 59 Nm (5.9 m kg, 43 ft • • 59 Nm (5.9 m kg, 43 ft • • 42 Nm (4.2 m kg, 30 ft • • 59 Nm (5.9 m kg, 43 ft •...

  • Page 221

    CHAS REAR SHOCK ABSORBER ASSEMBLY 59 Nm (5.9 m kg, 43 ft • • 59 Nm (5.9 m kg, 43 ft • • 42 Nm (4.2 m kg, 30 ft • • 59 Nm (5.9 m kg, 43 ft • •...

  • Page 222

    CHAS REAR SHOCK ABSORBER ASSEMBLY EAS00686 HANDLING THE REAR SHOCK ABSORBER WARNING This rear shock absorber contains highly compressed nitrogen gas. Before handling the rear shock absorber, read and make sure you understand the following informa- tion. The manufacturer cannot be held responsible for property damage or per- sonal injury that may result from improper handling of the rear shock absorber.

  • Page 223

    CHAS REAR SHOCK ABSORBER ASSEMBLY EAS00690 REMOVING THE REAR SHOCK ABSORBER ASSEMBLY 1. Stand the motorcycle on a level surface. WARNING Securely support the motorcycle so that there is no danger of it falling over. NOTE: Place the motorcycle on a suitable stand so that the rear wheel is elevated.

  • Page 224

    CHAS REAR SHOCK ABSORBER ASSEMBLY EAS00695 CHECKING THE REAR SHOCK ABSORBER ASSEMBLY 1. Check: • rear shock absorber rod Bends/damage → Replace the rear shock absorber assembly. • rear shock absorber Gas leaks/oil leaks → Replace the rear shock absorber assembly. •...

  • Page 225

    CHAS REAR SHOCK ABSORBER ASSEMBLY EAS00697 INSTALLING THE REAR SHOCK ABSORBER ASSEMBLY 1. Lubricate: • bearings • bolts Recommended lubricant Lithium-soap-based grease 2. Install: • rear shock absorber assembly NOTE: When installing the rear shock absorber assembly, lift up the swingarm. 3.

  • Page 226: Swingarm And Drive Chain

    CHAS SWINGARM AND DRIVE CHAIN EAS00700 SWINGARM AND DRIVE CHAIN 10 Nm (1.0 m kg, 7.2 ft 59 Nm (5.9 m kg, 43 ft • • • • 23 Nm (2.3 m kg, 17 ft • • 120 Nm (12.0 m kg, 85 ft •...

  • Page 227

    CHAS SWINGARM AND DRIVE CHAIN 10 Nm (1.0 m kg, 7.2 ft 59 Nm (5.9 m kg, 43 ft • • • • 23 Nm (2.3 m kg, 17 ft • • 120 Nm (12.0 m kg, 85 ft • •...

  • Page 228

    CHAS SWINGARM AND DRIVE CHAIN EAS00703 REMOVING THE SWINGARM 1. Stand the motorcycle on a level surface. WARNING Securely support the motorcycle so that there is no danger of it falling over. NOTE: Place the motorcycle on a suitable stand so that the rear wheel is elevated.

  • Page 229

    CHAS SWINGARM AND DRIVE CHAIN REMOVING THE DRIVE SPROCKET NOTE: Loosen the drive sprocket nut before removing the rear wheel. 1. Remove: • drive sprocket cover • chain guard 2. Straighten the lock washer tab a 3. Remove: • drive sprocket nut 1 •...

  • Page 230

    CHAS SWINGARM AND DRIVE CHAIN 2. Check: • pivot shaft Roll the pivot shaft on a flat surface. Bends → Replace. WARNING Do not attempt to straighten a bent pivot shaft. 3. Wash: • pivot shaft • dust covers • spacer •...

  • Page 231

    CHAS SWINGARM AND DRIVE CHAIN 2. Check: • drive chain Stiffness → Clean and lubricate or replace. 3. Clean: • drive chain M MMM M MMM M MMM M MMM M MMM a. Wipe the drive chain with a clean cloth. b.

  • Page 232

    CHAS SWINGARM AND DRIVE CHAIN 5. Lubricate: • drive chain Recommended lubricant Engine oil or chain lubricant suitable for O-ring chains 6. Check: • drive sprocket • rear wheel sprocket More than 1/4 tooth a wear → Replace the drive chain sprockets as a set. Bent teeth →...

  • Page 233

    CHAS SWINGARM AND DRIVE CHAIN 3. Install: • swingarm • pivot shaft • pivot shaft nut 92 Nm (9.2 m · kg, 66 ft · lb) 4. Install: • connecting arm bolt • washer • connecting arm nut 59 Nm (5.9 m · kg, 43 ft · lb) •...

  • Page 236

    CHAPTER 5 ENGINE ENGINE REMOVAL ..................5-1 EXHAUST PIPES AND MUFFLERS ............5-1 LEADS, CABLES, HOSES, AND IGNITION COIL ........5-2 ENGINE..................... 5-5 INSTALLING THE ENGINE............... 5-7 CYLINDER HEAD.................... 5-8 REMOVING THE CYLINDER HEAD............5-10 CHECKING THE CYLINDER HEAD ............5-11 CHECKING THE TAPPET COVERS AND CAMSHAFT SPROCKET COVER ....................

  • Page 237

    CLUTCH ......................5-40 CLUTCH COVER ..................5-40 PULL LEVER SHAFT ................5-41 CLUTCH ....................5-42 REMOVING THE CLUTCH ..............5-44 CHECKING THE FRICTION PLATES.............5-44 CHECKING THE CLUTCH PLATES ............5-45 CHECKING THE CLUTCH SPRINGS.............5-45 CHECKING THE CLUTCH HOUSING ............5-46 CHECKING THE CLUTCH BOSS............5-46 CHECKING THE PRESSURE PLATE ............5-46 CHECKING THE PULL LEVER SHAFT AND PULL ROD ......5-46 CHECKING THE PRIMARY DRIVEN GEAR ..........5-47...

  • Page 238

    CRANKCASE ....................5-69 CRANKCASE BEARINGS............... 5-71 SEPARATING THE CRANKCASE............5-72 CHECKING THE OIL STRAINER AND OIL DELIVERY PIPE 3 ..... 5-72 CHECKING THE TIMING CHAIN AND TIMING CHAIN GUIDES ..5-73 CHECKING THE BEARINGS AND OIL SEALS........5-73 CHECKING THE CRANKCASE ..............5-73 ASSEMBLING THE CRANKCASE............

  • Page 240: Engine Removal

    ENGINE REMOVAL EAS00188 ENGINE ENGINE REMOVAL EXHAUST PIPES AND MUFFLERS 27 Nm (2.7 m kg, 19 ft 27 Nm (2.7 m kg, 19 ft • • • • 20 Nm (2.0 m kg, 14 ft • • 20 Nm (2.0 m kg, 14 ft •...

  • Page 241

    ENGINE REMOVAL LEADS, CABLES, HOSES, AND IGNITION COIL Apply sealant 10 Nm (1.0 m kg, 7.2 ft • • Yamaha bond No. 1215 90890-85505 ∗ 7 Nm (0.7 m kg, 5.1 ft • • 16 Nm (1.6 m kg, 11 ft •...

  • Page 242

    ENGINE REMOVAL Apply sealant 10 Nm (1.0 m kg, 7.2 ft • • Yamaha bond No. 1215 90890-85505 ∗ 7 Nm (0.7 m kg, 5.1 ft • • 16 Nm (1.6 m kg, 11 ft • • Order Job/Part Q’ty...

  • Page 243

    ENGINE REMOVAL Apply sealant 10 Nm (1.0 m kg, 7.2 ft • • Yamaha bond No. 1215 90890-85505 ∗ 7 Nm (0.7 m kg, 5.1 ft • • 16 Nm (1.6 m kg, 11 ft • • Order Job/Part Q’ty...

  • Page 244

    ENGINE REMOVAL EAS00191 ENGINE 73 Nm (7.3 m kg, 53 ft • • 55 Nm (5.5m kg, 40 ft • • 73 Nm (7.3 m kg, 53 ft • • 73 Nm (7.3 m kg, 53 ft • • Order Job/Part Q’ty Remarks...

  • Page 245

    ENGINE REMOVAL 73 Nm (7.3 m kg, 53 ft • • 55 Nm (5.5m kg, 40 ft • • 73 Nm (7.3 m kg, 53 ft • • 73 Nm (7.3 m kg, 53 ft • • Order Job/Part Q’ty Remarks Engine upper bracket (right) Engine upper bracket (left)

  • Page 246

    ENGINE REMOVAL EAS00192 INSTALLING THE ENGINE 1. Install: • engine front bracket 1 • engine front bracket bolt/nut 2 • engine front mounting bolt/nut 3 • engine rear mounting bolt/nut 4 • engine front bracket bolt/nut 5 • engine front mounting bolt/nut 6 •...

  • Page 247

    CYLINDER HEAD EAS00221 CYLINDER HEAD 20 Nm (2.0 m kg, 14 ft • • 13 Nm (1.3 m kg, 9.4 ft • • 50 Nm (5.0 m kg, 36 ft • • 20 Nm (2.0 m kg, 14 ft • •...

  • Page 248

    CYLINDER HEAD 20 Nm (2.0 m kg, 14 ft • • 13 Nm (1.3 m kg, 9.4 ft • • 50 Nm (5.0 m kg, 36 ft • • 20 Nm (2.0 m kg, 14 ft • • 10 Nm (1.0 m kg, 7.2 ft •...

  • Page 249

    CYLINDER HEAD EAS00225 REMOVING THE CYLINDER HEAD 1. Align: • “I” mark a on the A.C. magneto rotor (with the stationary pointer b on the A.C. magneto cover) M MMM M MMM M MMM M MMM M MMM a. Turn the crankshaft counterclockwise. b.

  • Page 250

    CYLINDER HEAD EAS00229 CHECKING THE CYLINDER HEAD 1. Eliminate: • combustion chamber carbon deposits (with a rounded scraper) NOTE: Do not use a sharp instrument to avoid damag- ing or scratching: • spark plug bore threads • valve seats 2. Check: •...

  • Page 251

    CYLINDER HEAD EAS00212 CHECKING THE TAPPET COVERS AND CAMSHAFT SPROCKET COVER 1. Check: • tappet covers 1 • camshaft sprocket cover 2 • O-rings 3 Damage/wear → Replace the defective part(s). EAS00210 CHECKING THE TIMING CHAIN TENSIONER 1. Check: • timing chain tensioner Cracks/damage →...

  • Page 252: Cylinder Head

    CYLINDER HEAD 2. Install: • cylinder head • washers • cylinder head bolts NOTE: • Lubricate the cylinder head bolt threads and muting surface with engine oil. • Install the washers with their blunt surface facing the bolt seat. 3. Tighten: •...

  • Page 253

    CYLINDER HEAD c. Install the timing chain 1 onto the camshaft sprocket 2, then the camshaft sprocket onto the camshaft, and then finger tighten the camshaft sprocket bolts. NOTE: To install the camshaft sprocket sprocket, install the projection 3 on the camshaft sprocket into the slot a in the decompression lever.

  • Page 254

    CYLINDER HEAD d. Install the spring and timing chain tensioner cap bolt. Timing chain tensioner cap bolt 20 Nm (2.0 m · kg, 14 ft · lb) L LLL L LLL L LLL L LLL L LLL 6. Turn: • crankshaft (several turns counterclockwise) 7.

  • Page 255

    ROCKER ARMS AND CAMSHAFT ROCKER ARMS AND CAMSHAFT 14 Nm (1.4 m kg, 10 ft • • 14 Nm (1.4 m kg, 10 ft • • 10 Nm (1.0 m kg, 7.2 ft • • Order Job/Part Q’ty Remarks Removing the rocker arms and cam- Remove the parts in the order listed.

  • Page 256

    ROCKER ARMS AND CAMSHAFT 14 Nm (1.4 m kg, 10 ft • • 14 Nm (1.4 m kg, 10 ft • • 10 Nm (1.0 m kg, 7.2 ft • • Order Job/Part Q’ty Remarks Decompressor lever pin Refer to “REMOVING THE ROCKER ARMS AND CAMSHAFT”...

  • Page 257

    ROCKER ARMS AND CAMSHAFT EAS00202 REMOVING THE ROCKER ARMS AND CAMSHAFT 1. Loosen: • locknuts • adjusting screws 2. Remove: • camshaft retainer 1 3. Remove: • intake rocker arm shaft • exhaust rocker arm shaft • intake rocker arm •...

  • Page 258

    ROCKER ARMS AND CAMSHAFT 2. Measure: • camshaft lobe dimensions a and b Out of specification → Replace the cam- shaft. Camshaft lobe dimensions Intake a 43.488 ~ 43.588 mm (1.7121 ~ 1.7161 in) <Limit>: 43.388 mm (1.7062 in) b 36.959 ~ 37.059 mm (1.4551 ~ 1.4590 in) <Limit>: 36.840 mm (1.4504 in)

  • Page 259

    ROCKER ARMS AND CAMSHAFT EAS00206 CHECKING THE ROCKER ARMS AND ROCKER ARM SHAFTS The following procedure applies to both of the rocker arms and rocker arm shafts. 1. Check: • rocker arm Damage/wear → Replace. 2. Check: • rocker arm shaft Blue discoloration/excessive wear/pitting/ scratches →...

  • Page 260

    ROCKER ARMS AND CAMSHAFT 5. Calculate: • rocker-arm-to-rocker-arm-shaft clearance NOTE: Calculate the clearance by subtracting the rocker arm shaft outside diameter from the rocker arm inside diameter. Above 0.081 mm (0.0032 in) → Replace the defective part(s). Rocker-arm-to-rocker-arm-shaft clearance 0.009 ~ 0.037 mm (0.0004 ~ 0.0015 in) <Limit>: 0.081 mm (0.0032 in) EAS00220...

  • Page 261

    ROCKER ARMS AND CAMSHAFT 3. Install: • decompressor lever pin 1 • decompressor lever 2 NOTE: Install the decompressor lever pin 1 and decompressor lever 2 in the camshaft 3 as shown in the illustration. 4. Install: • camshaft 1 NOTE: Install the camshaft on the slot a facing up.

  • Page 262: Valves And Valve Springs

    VALVES AND VALVE SPRINGS EAS00236 VALVES AND VALVE SPRINGS Order Job/Part Q’ty Remarks Removing the valves and valve Remove the parts in the order listed. springs Cylinder head Refer to “CYLINDER HEAD”. Rocker arms/rocker arm shafts/cam- Refer to “ROCKER ARMS AND CAM- shaft SHAFT”.

  • Page 263

    VALVES AND VALVE SPRINGS EAS00237 REMOVING THE VALVES The following procedure applies to all of the valves and related components. NOTE: Before removing the internal parts of the cylin- der head (e.g., valves, valve springs, valve seats), make sure the valves properly seal. 1.

  • Page 264

    VALVES AND VALVE SPRINGS 3. Remove: • valve spring retainer 1 • valve spring 2 • valve stem seal 3 • valve spring seat 4 • valve 5 NOTE: Identify the position of each part very carefully so that it can be reinstalled in its original place. EAS00239 CHECKING THE VALVES AND VALVE GUIDES...

  • Page 265

    VALVES AND VALVE SPRINGS 2. Replace: • valve guide NOTE: To ease valve guide removal and installation, and to maintain the correct fit, heat the cylinder head to 100 °C (212 °F) in an oven. M MMM M MMM M MMM M MMM M MMM a.

  • Page 266

    VALVES AND VALVE SPRINGS 6. Measure: • valve stem runout Out of specification → Replace the valve. NOTE: • When installing a new valve, always replace the valve guide. • If the valve is removed or replaced, always replace the valve stem seal. Valve stem runout 0.010 mm (0.0004 in) EAS00240...

  • Page 267

    VALVES AND VALVE SPRINGS 4. Lap: • valve face • valve seat NOTE: After replacing the cylinder head or replacing the valve and valve guide, the valve seat and valve face should be lapped. M MMM M MMM M MMM M MMM M MMM a.

  • Page 268

    VALVES AND VALVE SPRINGS EAS00241 CHECKING THE VALVE SPRINGS The following procedure applies to all of the valve springs. 1. Measure: • valve spring free length a Out of specification → Replace the valve spring. Valve spring free length Intake 40.38 mm (1.59 in) <Limit>: 38.36 mm (1.51 in) Exhaust...

  • Page 269

    VALVES AND VALVE SPRINGS EAS00245 INSTALLING THE VALVES The following procedure applies to all of the valves and related components. 1. Deburr: • valve stem end (with an oil stone) 2. Lubricate: • valve stem 1 • valve stem seal 2 (with the recommended lubricant) Recommended lubricant Molybdenum disulfide oil...

  • Page 270

    VALVES AND VALVE SPRINGS 4. Install: • valve cotters NOTE: Install the valve cotters by compressing the valve spring with the valve spring compressor 1 and the valve spring compressor attach- ment 2. Valve spring compressor 98090-04019 Valve spring compressor attach- ment 90890-01243 5.

  • Page 271

    CYLINDER AND PISTON EAS00251 CYLINDER AND PISTON 1st 15 Nm (1.5 m kg, 11 ft • • 2nd 50 Nm (5.0 m kg, 36 ft • • 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft •...

  • Page 272

    CYLINDER AND PISTON 1st 15 Nm (1.5 m kg, 11 ft • • 2nd 50 Nm (5.0 m kg, 36 ft • • 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft • •...

  • Page 273

    CYLINDER AND PISTON EAS00253 REMOVING THE CYLINDER AND PISTON 1. Remove: • piston pin clips 1 • piston pin 2 • piston 3 CAUTION: Do not use a hammer to drive the piston pin out. NOTE: • Before removing the piston pin clip, cover the crankcase opening with a clean rag to pre- vent the piston pin clip from falling into the crankcase.

  • Page 274: Cylinder And Piston

    CYLINDER AND PISTON 2. Measure: • piston-to-cylinder clearance M MMM M MMM M MMM M MMM M MMM a. Measure cylinder bore “C” with the cylinder bore gauge. NOTE: Measure cylinder bore “C” by taking side-to- side and front-to-back measurements of the cylinder.

  • Page 275

    CYLINDER AND PISTON EAS00263 CHECKING THE PISTON RINGS 1. Measure: • piston ring side clearance Out of specification → Replace the piston and piston rings as a set. NOTE: Before measuring the piston ring side clear- ance, eliminate any carbon deposits from the piston ring grooves and piston rings.

  • Page 276

    CYLINDER AND PISTON EAS00265 CHECKING THE PISTON PIN 1. Check: • piston pin Blue discoloration/grooves → Replace the piston pin, and then check the lubrication system. 2. Measure: • piston pin outside diameter a Out of specification → Replace the piston pin.

  • Page 277

    CYLINDER AND PISTON EAS00267 INSTALLING THE PISTON AND CYLINDER 1. Install: • top ring 1 • 2nd ring 2 • oil ring expander 3 • lower oil ring rail 4 • upper oil ring rail 5 NOTE: Be sure to install the piston rings so that the manufacturer’s marks or numbers face up.

  • Page 278: Cylinder And Piston

    CYLINDER AND PISTON 5. Offset: • piston ring end gaps 120˚ a Top ring b Upper oil ring rail c Oil ring expander 120˚ 120˚ d Lower oil ring rail e 2nd ring f 20 mm (0.79 in) È Exhaust side È...

  • Page 279

    CLUTCH EAS00273 CLUTCH CLUTCH COVER 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft • • Order Job/Part Q’ty Remarks Removing the clutch cover Remove the parts in the order listed. Engine oil Drain.

  • Page 280

    CLUTCH PULL LEVER SHAFT Order Job/Part Q’ty Remarks Removing the pull lever shaft Remove the parts in the order listed. Circlip Circlip Washer Pull lever Pull lever spring Pull lever shaft Oil seal Bearing For installation, reverse the removal pro- cedure.

  • Page 281

    CLUTCH EAS00274 CLUTCH (5) (5) 90 Nm (9.0 m kg, 65 ft • • 9 Nm (0.9 m kg, 6.5 ft • • Order Job/Part Q’ty Remarks Removing the clutch Remove the parts in the order listed. Clutch spring Pressure plate Pull rod Friction plate 1 Inside diameter (plate...

  • Page 282

    CLUTCH (5) (5) 90 Nm (9.0 m kg, 65 ft • • 9 Nm (0.9 m kg, 6.5 ft • • Order Job/Part Q’ty Remarks Clutch boss nut Refer to “REMOVING THE CLUTCH” and “INSTALLING THE CLUTCH”. Lock washer Clutch boss Thrust washer Clutch housing For installation, reverse the removal pro-...

  • Page 283

    CLUTCH EAS00275 REMOVING THE CLUTCH 1. Remove: • clutch cover 1 NOTE: Loosen each bolt 1/4 of a turn at a time, in stages and in a crisscross pattern. After all of the bolts are fully loosened, remove them. 2. Straighten the lock washer tab. 3.

  • Page 284

    CLUTCH 2. Measure: • friction plate 1 thickness • friction plate 2 thickness • friction plate 3 thickness Out of specification → Replace the friction plates as a set. NOTE: Measure the friction plate at four places. Friction plate 1 thickness 2.90 ~ 3.10 mm (0.114 ~ 0.122 in) <Limit>: 2.80 mm (0.110 in) Friction plate 2 thickness...

  • Page 285

    CLUTCH 2. Measure: • clutch spring free length a Out of specification → Replace the clutch springs as a set. Clutch spring free length 55.6 mm (2.19 in) <Limit>: 52.82 mm (2.08 in) EAS00284 CHECKING THE CLUTCH HOUSING 1. Check: •...

  • Page 286: Checking The Primary Driven Gear

    CLUTCH 2. Check: • pull rod bearing Damage/wear → Replace. EAS00292 CHECKING THE PRIMARY DRIVEN GEAR 1. Check: • primary driven gear Damage/wear → Replace the primary drive gear and clutch housing as a set. → Excessive noise during operation Replace the primary drive gear and clutch housing as a set.

  • Page 287

    CLUTCH 4. Lubricate: • friction plates • clutch plates (with the recommended lubricant) Recommended lubricant Engine oil 5. Install: • clutch damper spring seat 1 • clutch damper spring 2 • friction plate 3 3 • clutch plates 4 • friction plates 1 5, 7 •...

  • Page 288

    CLUTCH NOTE: • To install the clutch cover, position the pull rod so that the teeth face towards that rear of the motorcycle. • Tighten the clutch cover bolts in stages and in a crisscross pattern. 8. Install: • pull lever spring 1 •...

  • Page 289: Oil Pump

    OIL PUMP OIL PUMP 20 Nm (2.0 m kg, 14 ft • • 18 Nm (1.8 m kg, 13 ft • • 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft •...

  • Page 290

    OIL PUMP 20 Nm (2.0 m kg, 14 ft • • 18 Nm (1.8 m kg, 13 ft • • 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft •...

  • Page 291

    OIL PUMP EAS00360 Order Job/Part Q’ty Remarks Disassembling the oil pump Remove the parts in the order listed. Oil pump housing 1/oil seal Oil pump outer rotor 1 Dowel pin Oil pump inner rotor 1 Oil pump housing cover/oil seal Dowel pin Oil pump shaft Dowel pin...

  • Page 292

    OIL PUMP EAS00364 CHECKING THE OIL PUMP 1. Check: • oil pump driven gear 1 • oil pump housing 1 2 • oil pump housing cover 3 • oil pump housing 2 4 Cracks/damage/wear → Replace the defec- tive part(s). 2.

  • Page 293

    OIL PUMP EAS00367 CHECKING THE OIL DELIVERY PIPES AND HOSES The following procedure applies to all of the oil delivery pipes and hoses. 1. Check: • oil delivery pipe • oil delivery hose Damage → Replace. Obstruction → Wash and blow out with compressed air.

  • Page 294

    OIL PUMP EAS00376 INSTALLING THE OIL PUMP 1. Install: • oil pump gasket • oil pump • oil baffle plate 2 10 Nm (1.0 m · kg, 7.2 ft · lb) • oil pump driven gear 1 • oil pump driven gear circlip •...

  • Page 295

    BALANCER DRIVEN GEAR BALANCER DRIVEN GEAR 70 Nm (7.0 m kg, 50 ft • • 80 Nm (8.0 m kg, 58 ft • • Order Job/Part Q’ty Remarks Removing the balancer driven gear Remove the parts in the order listed. Water pump assembly Refer to “WATER PUMP”...

  • Page 296

    BALANCER DRIVEN GEAR 70 Nm (7.0 m kg, 50 ft • • 80 Nm (8.0 m kg, 58 ft • • Order Job/Part Q’ty Remarks Water pump drive gear Primary drive gear Balancer drive gear Refer to “INSTALLING THE BALANCER DRIVEN GEAR AND BALANCER DRIVE GEAR”.

  • Page 297

    BALANCER DRIVEN GEAR REMOVING THE BALANCER DRIVEN GEAR AND BALANCER DRIVE GEAR 1. Straighten the lock washer tab. 2. Loosen: • balancer driven gear nut 1 • primary drive gear nut 2 NOTE: Place an aluminum plate a between the teeth of the balancer driven gear 3 and balancer drive gear 4.

  • Page 298

    BALANCER DRIVEN GEAR INSTALLING THE BALANCER DRIVEN GEAR AND BALANCER DRIVE GEAR 1. Install: • washer • balancer drive gear 1 • straight key 2 • balancer driven gear 3 • straight key • primary drive gear • water pump drive gear NOTE: •...

  • Page 299

    SHIFT SHAFT EAS00327 SHIFT SHAFT SHIFT SHAFT AND STOPPER LEVER 16 Nm (1.6 m kg, 11 ft • • 22 Nm (2.2 m kg, 16 ft • • Order Job/Part Q’ty Remarks Removing the shift shaft and stop- Remove the parts in the order listed. per lever Water pump assembly Refer to “WATER PUMP”...

  • Page 300

    SHIFT SHAFT 16 Nm (1.6 m kg, 11 ft • • 22 Nm (2.2 m kg, 16 ft • • Order Job/Part Q’ty Remarks Stopper lever spring Refer to “INSTALLING THE SHIFT SHAFT”. Circlip Stopper lever Refer to “INSTALLING THE SHIFT SHAFT”.

  • Page 301

    SHIFT SHAFT EAS00329 CHECKING THE SHIFT SHAFT 1. Check: • shift shaft 1 • shift shaft pawl 2 Bends/damage/wear → Replace. • shift shaft spring 3 Damage/wear → Replace. EAS00330 CHECKING THE STOPPER LEVER 1. Check: • stopper lever 1 Bends/damage →...

  • Page 302

    STARTER CLUTCH AND A.C. MAGNETO EAS00341 STARTER CLUTCH AND A.C. MAGNETO Apply sealant Yamaha bond No. 1215 90890-85505 80 Nm (8.0 m kg, 58 ft • • 30 Nm (3.0 m kg, 22 ft • • 7 Nm (0.7 m kg, 5.1 ft...

  • Page 303

    STARTER CLUTCH AND A.C. MAGNETO Apply sealant Yamaha bond No. 1215 90890-85505 80 Nm (8.0 m kg, 58 ft • • 30 Nm (3.0 m kg, 22 ft • • 7 Nm (0.7 m kg, 5.1 ft • • 10 Nm (1.0 m kg, 7.2 ft...

  • Page 304

    STARTER CLUTCH AND A.C. MAGNETO EAS00346 REMOVING THE A.C. MAGNETO ROTOR 1. Remove: • torque limiter cover CAUTION: Do not remove the bearing 1. 2. Remove: • A.C. magneto cover NOTE: Loosen each bolt 1/4 of a turn at a time, in stages and in a crisscross pattern.

  • Page 305

    STARTER CLUTCH AND A.C. MAGNETO CHECKING THE STATOR COIL AND CRANKSHAFT POSITION SENSOR 1. Check: • stator coil • crankshaft position sensor Damage → Replace the crankshaft position sensor/stator assembly. EAS00351 CHECKING THE STARTER CLUTCH 1. Check: • starter clutch rollers 1 Damage/wear →...

  • Page 306

    7 Nm (0.7 m · kg, 5.1 ft · lb) NOTE: Align the projection a on the stator coil with the slot b in the A.C. magneto cover. 2. Apply: • Yamaha bond No. 1215 1 (into the slits) Yamaha bond No. 1215 90890-85505 3. Install: •...

  • Page 307

    STARTER CLUTCH AND A.C. MAGNETO 5. Tighten: • A.C. magneto rotor nut 1 80 Nm (8.0 m · kg, 58 ft · lb) NOTE: • While holding the A.C. magneto rotor 2 with the sheave holder 3, tighten the A.C. mag- neto rotor nut.

  • Page 308

    CRANKCASE CRANKCASE 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft • • 4 Nm (0.4 m kg, 2.9 ft • • 10 Nm (1.0 m kg, 7.2 ft •...

  • Page 309

    CRANKCASE 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft • • 4 Nm (0.4 m kg, 2.9 ft • • 10 Nm (1.0 m kg, 7.2 ft •...

  • Page 310

    CRANKCASE CRANKCASE BEARINGS Apply sealant 10 Nm (1.0 m kg, 7.2 ft • • Yamaha bond No. 1215 ∗ 90890-85505 10 Nm (1.0 m kg, 7.2 ft • • Order Job/Part Q’ty Remarks Removing the crankcase bearings Remove the parts in the order listed.

  • Page 311

    CRANKCASE SEPARATING THE CRANKCASE 1. Separate: • right crankcase 1 • left crankcase 2 M MMM M MMM M MMM M MMM M MMM a. Remove the crankcase bolts. NOTE: • Loosen each bolt 1/4 of a turn at a time and after all the bolts are loosened, remove them.

  • Page 312

    CRANKCASE 2. Check: • oil delivery pipe 3 Cracks/damage → Replace. • oil delivery pipe holes 1 Clogged → Blow out with compressed air. EAS00207 CHECKING THE TIMING CHAIN AND TIMING CHAIN GUIDES 1. Check: • timing chain Damage/stiffness → Replace the timing chain and camshaft sprocket as a set.

  • Page 313

    Install the bearing retainer with the “OUT” mark a facing up. 3. Thoroughly clean all the gasket mating sur- faces and crankcase mating surfaces. 4. Apply: • Yamaha bond No. 1215 1 (to the mating surfaces of both crankcase halves) Yamaha bond No. 1215 90890-85505...

  • Page 314

    CRANKCASE 6. Fit the right crankcase onto the left crank- case. Tap lightly on the case with a soft hammer. CAUTION: Before installing and torquing the crank- case bolts, be sure to check whether the transmission is functioning properly by manually rotating the shift drum in both directions.

  • Page 315

    CRANKSHAFT EAS00381 CRANKSHAFT CRANKSHAFT AND BALANCER Order Job/Part Q’ty Remarks Removing the crankshaft and bal- Remove the parts in the order listed. ancer Crankcase Separate. Refer to “CRANKCASE”. Balancer Crankshaft Refer to “REMOVING THE CRANK- SHAFT ASSEMBLY” and “INSTALLING THE CRANKSHAFT”. For installation, reverse the removal pro- cedure.

  • Page 316

    CRANKSHAFT EAS00388 REMOVING THE CRANKSHAFT ASSEMBLY 1. Remove: • crankshaft 1 NOTE: • Remove the crankshaft with the crankcase separating tool 2. • Make sure the crankcase separating tool is centered over the crankshaft. Crankcase separating tool 90890-01135 EAS00394 CHECKING THE CRANKSHAFT 1.

  • Page 317

    CRANKSHAFT M MMM M MMM M MMM M MMM M MMM a. The crankshaft 1 and the crankshaft pin 2 oil passages must be properly intercon- nected with a tolerance of less than 1 mm (0.04 in). L LLL L LLL L LLL L LLL L LLL...

  • Page 318

    TRANSMISSION EAS00419 TRANSMISSION Order Job/Part Q’ty Remarks Removing the transmission, shift Remove the parts in the order listed. drum, and shift forks Crankcase Separate. Refer to “CRANKCASE”. Shift fork “C” Shift fork “R” Refer to “INSTALLING THE TRANSMIS- SION”. Shift fork “L” Shift drum Main axle assembly Spacer...

  • Page 319

    TRANSMISSION MAIN AXLE Order Job/Part Q’ty Remarks Disassembling the main axle Remove the parts in the order listed. Circlip 2nd pinion gear Toothed lock washer Toothed washer retainer 5th pinion gear Toothed spacer Toothed washer Refer to “ASSEMBLING THE MAIN AXLE AND DRIVE AXLE”.

  • Page 320

    TRANSMISSION DRIVE AXLE Order Job/Part Q’ty Remarks Disassembling the drive axle Remove the parts in the order listed. Circlip Washer Refer to “ASSEMBLING THE MAIN AXLE AND DRIVE AXLE”. 1st wheel gear 4th wheel gear Circlip Toothed washer 3rd wheel gear 5th wheel gear 2nd wheel gear Drive axle...

  • Page 321

    TRANSMISSION EAS00421 CHECKING THE SHIFT FORKS The following procedure applies to all of the shift forks. 1. Check: • shift fork cam follower 1 • shift fork pawl 2 Bends/damage/scoring/wear → Replace the shift fork. 2. Check: • shift fork movement Rough movement →...

  • Page 322

    TRANSMISSION 2. Measure: • drive axle runout (with a centering device and dial gauge 1) Out of specification → Replace the drive axle. Drive axle runout limit 0.08 mm (0.0031 in) 3. Check: • transmission gears Blue discoloration/pitting/wear → Replace the defective gear(s).

  • Page 323

    TRANSMISSION INSTALLING THE TRANSMISSION 1. Install: • shift fork “L” 1 (to drive axle) • shift fork “C” 2 (to main axle) • shift fork “R” 3 (to drive axle) • shift drum 4 • transmission assembly NOTE: • The embossed marks on the shift forks should face towards the right side of the engine and be in the following sequence: “R”, “C”, and “L”.

  • Page 324

    COOL...

  • Page 325

    COOL CHAPTER 6 COOLING SYSTEM RADIATOR ...................... 6-1 CHECKING THE RADIATOR..............6-3 INSTALLING THE RADIATOR..............6-4 THERMOSTAT ....................6-5 CHECKING THE THERMOSTAT.............. 6-6 INSTALLING THE THERMOSTAT............6-6 WATER PUMP....................6-8 DISASSEMBLING THE WATER PUMP..........6-11 CHECKING THE WATER PUMP ............6-11 ASSEMBLING THE WATER PUMP............6-12 INSTALLING THE WATER PUMP ............

  • Page 326

    COOL...

  • Page 327

    COOL RADIATOR EAS00454 COOLING SYSTEM RADIATOR 7 Nm (0.7 m kg, 5.1 ft • • 5 Nm (0.5 m kg, 3.6 ft • • Order Job/Part Q’ty Remarks Removing the radiator Remove the parts in the order listed. Seat/side panels (left and right) Refer to “COWLING AND COVER”...

  • Page 328

    COOL RADIATOR 7 Nm (0.7 m kg, 5.1 ft • • 5 Nm (0.5 m kg, 3.6 ft • • Order Job/Part Q’ty Remarks Radiator outlet hose Refer to “INSTALLING THE RADIA- TOR”. Radiator inlet hose Radiator fan motor coupler Disconnect.

  • Page 329

    COOL RADIATOR EAS00455 CHECKING THE RADIATOR 1. Check: • radiator fins Obstruction → Clean. Apply compressed air to the rear of the radi- ator. Damage → Repair or replace. NOTE: Straighten any flattened fins with a thin, flat- head screwdriver. 2.

  • Page 330

    COOL RADIATOR EAS00456 INSTALLING THE RADIATOR 1. Install: • radiator inlet hose 1 • radiator outlet hose 2 • hose clamps 3 NOTE: Install the radiator inlet hose and radiator out- let hose so that each hose contacts the respective projection a. 2.

  • Page 331

    COOL THERMOSTAT EAS00460 THERMOSTAT 18 Nm (1.8 m kg, 13 ft • • 10 Nm (1.0 m kg, 7.2 ft • • Order Job/Part Q’ty Remarks Removing the thermostat Remove the parts in the order listed. Coolant Drain. Refer to “CHANGING THE COOLANT” in chapter 3.

  • Page 332

    COOL THERMOSTAT EAS00462 CHECKING THE THERMOSTAT 1. Check: • thermostat 1 Does not open at 71 ~ 85 °C (159.8 ~ 185 °F) → Replace. M MMM M MMM M MMM M MMM M MMM a. Suspend the thermostat in a container filled with water.

  • Page 333

    COOL THERMOSTAT 2. Install: • radiator inlet hose 1 • hose clamp 2 NOTE: Install the radiator inlet hose 1 so that it con- tacts the projection on the thermostat cover a. 3. Install: • copper washer • coolant temperature sensor 18 Nm (1.8 m ·...

  • Page 334: Water Pump

    COOL WATER PUMP EAS00468 WATER PUMP 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft • • Order Job/Part Q’ty Remarks Removing the water pump Remove the parts in the order listed.

  • Page 335

    COOL WATER PUMP 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft • • 10 Nm (1.0 m kg, 7.2 ft • • Order Job/Part Q’ty Remarks Water pump assembly Water pump outlet pipe Refer to “INSTALLING THE WATER PUMP”.

  • Page 336

    COOL WATER PUMP Order Job/Part Q’ty Remarks Disassembling the water pump Remove the parts in the order listed. Circlip Impeller shaft gear Refer to “ASSEMBLING THE WATER PUMP”. Washer Impeller shaft assembly Refer to “DISASSEMBLING THE Water pump seal WATER PUMP” and “ASSEMBLING Oil seal THE WATER PUMP”.

  • Page 337

    COOL WATER PUMP EAS00470 DISASSEMBLING THE WATER PUMP 1. Remove: • water pump seal 1 NOTE: Tap out the water pump seal from water pump housing in the direction of the arrow shown. 2 Water pump housing 2. Remove: • bearing 1 •...

  • Page 338

    NOTE: • Install the water pump seal with the special tools. • Before installing the water pump, apply Yamaha bond No.1215 2 to the water pump housing 3. Mechanical seal installer 4 90890-04132 Middle driven shaft bearing driver 90890-04058 Yamaha bond No.1215...

  • Page 339

    COOL WATER PUMP 3. Install: • rubber damper 1 • rubber damper holder 2 NOTE: Before installing the rubber damper, apply tap water or coolant onto its outer surface. 4. Measure: • impeller shaft tilt Out of specification → Repeat steps (3) and (4).

  • Page 340

    COOL WATER PUMP EAS00478 INSTALLING THE WATER PUMP 1. Install: • water pump outlet hose 1 • O-rings • water pump outlet pipe (to the water pump assembly) 10 Nm (1.0 m · kg, 7.2 ft · lb) • hose clamps 2 WARNING Always use new O-rings.

  • Page 342

    CHAPTER 7 FUEL INJECTION SYSTEM FUEL INJECTION SYSTEM................7-1 WIRING DIAGRAM ................... 7-2 ECU SELF-DIAGNOSTIC FUNCTION............7-3 ALTERNATE OPERATION CONTROL (FAIL-SAFE ACTION) ....7-4 FAIL-SAFE ACTION TABLE ..............7-4 TROUBLESHOOTING CHART ..............7-6 DIAGNOSTIC MODE ................7-7 TROUBLESHOOTING DETAILS ............7-12 THROTTLE BODY ASSEMBLY..............7-23 CHECKING THE FUEL INJECTOR ............

  • Page 344

    FUEL INJECTION SYSTEM EAS00894 FUEL INJECTION SYSTEM EAS00895 FUEL INJECTION SYSTEM 1 Air cut-off valve 9 Intake air temperature sensor H Coolant temperature sensor 2 Air induction system solenoid 0 Air filter case I Spark plug 3 Engine trouble warning light A Fuel injection system relay J Intake air pressure sensor 4 Fuel tank...

  • Page 345

    FUEL INJECTION SYSTEM EAS00898 WIRING DIAGRAM 1 Crankshaft position sensor 3 Neutral switch 4 Main switch 6 Battery 7 Main fuse 0 Fuel injection system fuse D Engine stop switch I Fuel injection system relay J Sidestand switch K Fuel pump L ECU M Ignition coil N Spark plug...

  • Page 346

    FUEL INJECTION SYSTEM EAS00899 ECU SELF-DIAGNOSTIC FUNCTION The ECU is equipped with a self-diagnostic function to ensure the normal operation of the fuel injec- tion system. If a malfunction is detected in the fuel injection system, the self-diagnostic function immediately operates the engine with alternate operating instructions and the engine trouble warn- ing light comes on to alert the rider of the malfunction.

  • Page 347: Fail-safe Action Table

    FUEL INJECTION SYSTEM EAS00901 Checking for a defective engine trouble warning light bulb The engine trouble warning light comes on for 1.4 seconds after the main switch is turned to “ON” or when the start switch is pushed. If the warning light does not come on under these conditions, the warning light bulb may be defective.

  • Page 348: Communication Error With Meter

    FUEL INJECTION SYSTEM Fault Item Symptom Fail-safe action Startability Driveability code No. Lean angle cut-off The motorcycle has over- switch (latch up turned. — detected) Faulty ignition Open circuit is detected in the primary lead of the ignition — coil. Lean angle cut-off Open or short circuit is switch (open or short...

  • Page 349

    FUEL INJECTION SYSTEM EAS00904 TROUBLESHOOTING CHART Engine operation is not normal or the engine trouble warning light is on. The engine trouble warning light may not come on even if the engine operation is not normal. The engine trouble warning light comes on. The engine trouble warning light does not come on.

  • Page 350

    FUEL INJECTION SYSTEM EAS00905 DIAGNOSTIC MODE Setting the diagnostic mode 1. Set the main switch to “OFF” and set the engine stop switch to “ ”. 2. Disconnect the wire harness coupler from the fuel pump. 3. Simultaneously press hold “SELECT”...

  • Page 351

    FUEL INJECTION SYSTEM 8. Verify the operation of the sensor or actua- tor. • Sensor operation The data representing the operating condi- tions of the sensor appears on the odome- ter/fuel reserve tripmeter/tripmeter 2 LCD. • Actuator operation Set the engine stop switch to “ ”...

  • Page 352: Diagnostic Monitoring Code Table

    FUEL INJECTION SYSTEM EAS00906 Diagnostic monitoring code table Fault Symptom Probable cause of malfunction Diagnostic code code No. No normal signals are received from • Open or short circuit in wire harness the crankshaft position sensor. • Defective crankshaft position sensor •...

  • Page 353

    FUEL INJECTION SYSTEM Fault Symptom Probable cause of malfunction Diagnostic code code No. An error is detected while reading or • Malfunction in ECU (The CO adjustment value is not writing on EEPROM. properly written on or read from the internal memory.) Power supply to the fuel injection sys- •...

  • Page 354

    FUEL INJECTION SYSTEM Diagnostic Data displayed on meter Item Action code (reference value) Lean angle cut-off switch Displays the lean angle cut-off switch values. Upright: 0.4 ~ 1.4 V Overturned: 3.7 ~ 4.4 V Fuel system voltage (bat- Displays the fuel system voltage (battery voltage). Approximately 12.0 V tery voltage) Set the engine stop switch to “...

  • Page 355

    FUEL INJECTION SYSTEM EAS00908 TROUBLESHOOTING DETAILS This section describes the countermeasures per fault code number displayed on the meter. Check and service the items or components that are the probable cause of the malfunction following the order in the “TROUBLESHOOTING CHART”. After the checking and servicing the malfunctioning part, reset the meter display.

  • Page 356

    FUEL INJECTION SYSTEM Fault code No. Symptom Open or short circuit is detected from the intake air pressure sensor. Used diagnostic code No. 03 (intake air pressure sensor) Order Item/components Check or maintenance job Restore method Coupler connections Check the couplers for any pins that may have Reinstated by crank- Intake air pressure sensor coupler pulled out.

  • Page 357

    FUEL INJECTION SYSTEM Fault code No. Symptom Intake air pressure sensor hose is disconnected or clogged. Used diagnostic code No. 03 (intake air pressure sensor) Order Item/components Check or maintenance job Restore method Disconnected, clogged, kinked, or Repair or replace the hose. Reinstated by start- pinched intake air pressure sensor ing the engine and...

  • Page 358

    FUEL INJECTION SYSTEM Fault code No. Symptom The throttle position sensor is detected stuck. Used diagnostic code No. 01 (throttle position sensor) Order Item/components Check or maintenance job Restore method Defective throttle position sensor Replace the sensor if it is defective. Reinstated by start- Refer to “THROTTLE BODY ASSEMBLY”.

  • Page 359

    FUEL INJECTION SYSTEM Fault code No. Symptom Open or short circuit is detected from the intake air temperature sensor. Used diagnostic code No. 05 (intake air temperature sensor) Order Item/components Check or maintenance job Restore method Intake air temperature sensor Check the sensor looseness or pinching.

  • Page 360

    FUEL INJECTION SYSTEM Fault code No. Symptom The motorcycle has overturned. Used diagnostic code No. 08 (lean angle cut-off switch) Order Item/components Check or maintenance job Restore method The motorcycle has overturned. Raise the motorcycle upright. Reinstated by set- ting the main switch Lean angle cut-off switch installa- Check the switch for looseness or pinching.

  • Page 361

    FUEL INJECTION SYSTEM Fault code No. Symptom A. No normal signals are received from the speed sensor. B. Open or short circuit is detected in the neutral switch. Used diagnostic code No. 07 (speed sensor) → A1 ~ A4 / No. 21 (neutral switch) → B1 ~ B4 Order Item/components Check or maintenance job...

  • Page 362

    FUEL INJECTION SYSTEM Fault code No. Symptom A. No normal signals are received from the speed sensor. B. Open or short circuit is detected in the neutral switch. Used diagnostic code No. 07 (speed sensor) → A1 ~ A4 / No. 21 (neutral switch) → B1 ~ B4 Order Item/components Check or maintenance job...

  • Page 363

    FUEL INJECTION SYSTEM Fault code No. Symptom The ECU is unable to monitor the battery voltage. Used diagnostic code No. 09, 50 (fuel system voltage) Order Item/components Check or maintenance job Restore method Coupler connections Check the couplers for any pins that may have Reinstated by start- Fuel injection system relay cou- pulled out.

  • Page 364

    FUEL INJECTION SYSTEM Fault code No. Symptom Error is detected while reading or writing on EEPROM (CO adjustment value). Used diagnostic code No. 60 (EEPROM improper cylinder indication) Order Item/components Check or maintenance job Restore method Malfunction in ECU Execute the diagnostic mode. (Code No. 60) Reinstated by set- •...

  • Page 365

    FUEL INJECTION SYSTEM Fault code No. Er-1 Symptom No signals are received from the ECU. Used diagnostic code No. – – Order Item/components Check or maintenance job Restore method Coupler connections Check the couplers for any pins that may have Reinstated automati- ECU coupler pulled out.

  • Page 366

    THROTTLE BODY ASSEMBLY EAS00909 THROTTLE BODY ASSEMBLY 10 10 6 Nm (0.6 m kg, 4.3 ft • • Order Job/Part Q’ty Remarks Removing the throttle body assem- Remove the parts in the order listed. Seat Refer to “COWLING AND COVER” in chapter 3.

  • Page 367

    THROTTLE BODY ASSEMBLY 10 10 6 Nm (0.6 m kg, 4.3 ft • • Order Job/Part Q’ty Remarks Fast idle plunger outlet hose Disconnect. Fast idle plunger inlet hose Pilot air hose Throttle body joint clamp screw Loosen. Throttle body assembly Refer to “INSTALLING THE THROT- Throttle body joint clamp TLE BODY ASSEMBLY”.

  • Page 368

    THROTTLE BODY ASSEMBLY Order Job/Part Q’ty Remarks Disassembling the throttle body Remove the parts in the order listed. assembly Throttle position sensor Fuel injection pipe Fuel injector Throttle body CAUTION: Do not disassemble the throttle body. For assembly, reverse the disassembly procedure.

  • Page 369

    THROTTLE BODY ASSEMBLY EAS00912 CHECKING THE FUEL INJECTOR 1. Check: • fuel injector Damage → Replace. R/L R/B 2. Check: • fuel injector resistance M MMM M MMM M MMM M MMM M MMM a. Disconnect the injection wire harness cou- pler from the fuel injector.

  • Page 370

    THROTTLE BODY ASSEMBLY INSTALLING THE THROTTLE BODY ASSEMBLY 1. Install: • throttle body joint clamps NOTE: Align the projection a on the throttle body joint with the slot b in the throttle body joint clamp. 2. Install: • throttle body joint NOTE: Align the projection a on the cylinder head with the slot b in the throttle body joint.

  • Page 371

    THROTTLE BODY ASSEMBLY EAS00819 CHECKING THE FUEL PUMP WARNING Gasoline is extremely flammable and under certain circumstances there can be a dan- ger of an explosion or fire. Be extremely careful and note the following points: • Stop the engine before refueling. •...

  • Page 372

    THROTTLE BODY ASSEMBLY 2. Check: • fuel pressure M MMM M MMM M MMM M MMM M MMM a. Remove the fuel tank. Refer to “FUEL TANK” in chapter 3. b. Connect the pressure gauge 1 to the adapter 2. c.

  • Page 373

    THROTTLE BODY ASSEMBLY 1. Check: • throttle position sensor (removed from the throttle body) M MMM M MMM M MMM M MMM M MMM a. Disconnect the throttle position sensor cou- pler from the throttle position sensor. b. Remove the throttle position sensor from the throttle body.

  • Page 374

    THROTTLE BODY ASSEMBLY Throttle position sensor resis- tance 0 ~ 5 ± 1.0 kΩ at 20 °C (68 °F) (yellow — black/blue) L LLL L LLL L LLL L LLL L LLL 2. Adjust: • throttle position sensor angle M MMM M MMM M MMM M MMM...

  • Page 375: Air Induction System

    AIR INDUCTION SYSTEM EAS00507 AIR INDUCTION SYSTEM AIR INJECTION The air induction system burns unburned exhaust gases by injecting fresh air (second- ary air) into the exhaust port, reducing the emission of hydrocarbons. When there is negative pressure at the exhaust port, the reed valve opens, allowing secondary air to flow into the exhaust port.

  • Page 376

    AIR INDUCTION SYSTEM EAS00509 AIR INDUCTION SYSTEM DIAGRAMS 1 Air filter case 2 Reed valve 3 Air cut-off valve 4 Exhaust port 7 - 33...

  • Page 377

    AIR INDUCTION SYSTEM AIR CUT-OFF VALVE ASSEMBLY Order Job/Part Q’ty Remarks Removing the air cut-off valve Remove the parts in the order listed. assembly Right side panel Refer to “COWLING AND COVER” in chapter 3. Fuel tank right side cover Refer to “FUEL TANK”...

  • Page 378

    AIR INDUCTION SYSTEM Order Job/Part Q’ty Remarks Disassembling the air cut-off valve Remove the parts in the order listed. assembly Air cut-off valve cover Reed valve assembly Air cut-off valve For assembly, reverse the disassembly procedure. 7 - 35...

  • Page 379

    AIR INDUCTION SYSTEM EAS00918 CHECKING THE AIR INDUCTION SYSTEM 1. Check: • hoses Loose connections → Connect properly. Cracks/damage → Replace. • pipe Cracks/damage → Replace. Refer to “CYLINDER HEAD” in chapter 5. 2. Check: • reed valve • reed valve stopper •...

  • Page 380

    – ELEC...

  • Page 381: Table Of Contents

    – ELEC CHAPTER 8 ELECTRICAL SYSTEM ELECTRICAL COMPONENTS................ 8-1 CHECKING SWITCH CONTINUITY..............8-3 CHECKING THE SWITCHES................8-5 CHECKING THE BULBS AND BULB SOCKETS .......... 8-7 TYPES OF BULBS ..................8-7 CHECKING THE CONDITION OF THE BULBS ........8-8 CHECKING THE CONDITION OF THE BULB SOCKETS .......8-9 CHECKING THE LEDs................8-9 IGNITION SYSTEM ..................

  • Page 382

    – ELEC IMMOBILIZER SYSTEM................8-52 CIRCUIT DIAGRAM ................8-52 GENERAL INFORMATION ..............8-53 KEY CODE REGISTRATION ..............8-54 SELF-DIAGNOSIS MALFUNCTION CODES..........8-57 TROUBLESHOOTING ................8-58 CHECKING THE IMMOBILIZER SYSTEM ..........8-59 SELF-DIAGNOSIS..................8-63 TROUBLESHOOTING ................8-64...

  • Page 383: Electrical Components

    – ELEC ELECTRICAL COMPONENTS EAS00729 ELECTRICAL SYSTEM ELECTRICAL COMPONENTS 1 Spark plug 8 Main switch E Lean angle cut-off switch 2 Spark plug cap 9 Fuel pump F Turn signal/hazard relay 3 Ignition coil 0 Clutch switch G Headlight relay 4 Intake air pressure sensor A Left handlebar switch H Radiator fan motor relay...

  • Page 384

    – ELEC ELECTRICAL COMPONENTS L Fuse box 2 W Speed sensor M Starter relay X Starter motor N Main fuse Y Radiator fan motor O Rectifier/regulator Z Horn P ECU [ Air induction system solenoid Q Intake air temperature sensor R Sidestand switch S Neutral switch T Crankshaft position sensor...

  • Page 385: Checking Switch Continuity

    – ELEC CHECKING SWITCH CONTINUITY EAS00730 CHECKING SWITCH CONTINUITY Check each switch for continuity with the pocket tester. If the continuity reading is incor- rect, check the wiring connections and if nec- essary, replace the switch. CAUTION: Never insert the tester probes into the cou- pler terminal slots 1.

  • Page 386

    – ELEC CHECKING SWITCH CONTINUITY 8 - 4...

  • Page 387: Checking The Switches

    – ELEC CHECKING THE SWITCHES EAS00731 CHECKING THE SWITCHES Check each switch for damage or wear, proper connections, and also for continuity between the ter- minals. Refer to “CHECKING SWITCH CONTINUITY”. Damage/wear → Repair or replace. Improperly connected → Properly connect. Incorrect continuity reading →...

  • Page 388

    – ELEC CHECKING THE SWITCHES 1 Main switch 2 Horn switch 3 Pass switch 4 Dimmer switch 5 Turn signal switch 6 Hazard switch 7 Clutch switch 8 Engine stop switch 9 Start switch 0 Front brake light switch A Sidestand switch B Neutral switch C Rear brake light switch D Fuses...

  • Page 389: Checking The Bulbs And Bulb Sockets

    – ELEC CHECKING THE BULBS AND BULB SOCKETS EAS00732 CHECKING THE BULBS AND BULB SOCKETS Check each bulb and bulb socket for damage or wear, proper connections, and also for con- tinuity between the terminals. Damage/wear → Repair or replace the bulb, bulb socket or both.

  • Page 390

    – ELEC CHECKING THE BULBS AND BULB SOCKETS CHECKING THE CONDITION OF THE BULBS The following procedure applies to all of the bulbs. 1. Remove: • bulb WARNING Since the headlight bulb gets extremely hot, keep flammable products and your hands away from the bulb until it has cooled down.

  • Page 391

    – ELEC CHECKING THE BULBS AND BULB SOCKETS CHECKING THE CONDITION OF THE BULB SOCKETS The following procedure applies to all of the bulb sockets. 1. Check: • bulb socket (for continuity) (with the pocket tester) No continuity → Replace. Pocket tester 90890-03112 NOTE:...

  • Page 392

    – ELEC CHECKING THE BULBS AND BULB SOCKETS b. Connect two jumper leads 1 from the bat- tery terminals to the respective coupler ter- minal as shown. Positive battery ter- minal → chocolate Turn signal indicator light (left) Negative battery ter- minal →...

  • Page 393

    – ELEC CHECKING THE BULBS AND BULB SOCKETS WARNING • A wire that is used as a jumper lead must have at least the same capacity of the bat- tery lead, otherwise the jumper lead may burn. • This check is likely to produce sparks, therefore, make sure no flammable gas or fluid is in the vicinity.

  • Page 394

    – ELEC IGNITION SYSTEM EAS00734 IGNITION SYSTEM CIRCUIT DIAGRAM 8 - 12...

  • Page 395

    – ELEC IGNITION SYSTEM EAS00736 EAS00739 TROUBLESHOOTING 2. Battery The ignition system fails to operate (no • Check the condition of the battery. spark or intermittent spark). Refer to “CHECKING AND CHARGING THE BATTERY” in chapter 3. Check: 1. main and ignition fuses Minimum open-circuit voltage 2.

  • Page 396

    – ELEC IGNITION SYSTEM EAS00742 EAS00744 4. Ignition spark gap 5. Spark plug cap resistance • Disconnect the spark plug cap 1 from the • Remove the spark plug cap from the spark spark plug. plug lead. • Connect the pocket tester (Ω × 1k) to the •...

  • Page 397

    – ELEC IGNITION SYSTEM EAS00746 EAS00748 6. Ignition coil resistance 7. Crankshaft position sensor resistance • Disconnect the ignition coil connectors • Disconnect the crankshaft position sensor from the ignition coil terminals. coupler from the wire harness. • Connect the pocket tester (Ω × 1) to the •...

  • Page 398: Ignition System

    – ELEC IGNITION SYSTEM EAS00750 EAS00754 9. Engine stop switch 11.Wiring • Check the engine stop switch for continu- • Check the entire ignition system’s wiring. ity. Refer to “CIRCUIT DIAGRAM”. Refer to “CHECKING THE SWITCHES”. • Is the ignition system’s wiring properly •...

  • Page 399

    – ELEC ELECTRIC STARTING SYSTEM EAS00755 ELECTRIC STARTING SYSTEM CIRCUIT DIAGRAM 8 - 17...

  • Page 400

    – ELEC ELECTRIC STARTING SYSTEM EAS00756 STARTING CIRCUIT CUT-OFF SYSTEM OPERATION If the engine stop switch is set to “ ” and the main switch is set to “ON” (both switches are closed), the starter motor can only operate if at least one of the following conditions is met: •...

  • Page 401: Electric Starting System

    – ELEC ELECTRIC STARTING SYSTEM EAS00757 EAS00739 TROUBLESHOOTING 2. Battery The starter motor fails to turn. • Check the condition of the battery. Refer to “CHECKING AND CHARGING Check: THE BATTERY” in chapter 3. 1. main and ignition fuses 2. battery Minimum open-circuit voltage 3.

  • Page 402

    – ELEC ELECTRIC STARTING SYSTEM EAS00759 Positive tester probe → 4. Relay unit (starting circuit cut-off relay) sky blue 1 Negative tester probe → • Disconnect the relay unit from the wire black/yellow 2 harness. • Connect the pocket tester (Ω × 1) and bat- Positive tester probe →...

  • Page 403

    – ELEC ELECTRIC STARTING SYSTEM EAS00761 EAS00750 6. Starter relay 8. Engine stop switch • Disconnect the starter relay coupler from • Check the engine stop switch for continu- the coupler. ity. • Connect the pocket tester (Ω × 1) and bat- Refer to “CHECKING THE SWITCHES”.

  • Page 404

    – ELEC ELECTRIC STARTING SYSTEM EAS00764 12.Start switch • Check the start switch for continuity. Refer to “CHECKING THE SWITCHES”. • Is the start switch OK? Replace right handlebar switch. EAS00766 13. Wiring • Check the entire starting system’s wiring. Refer to “CIRCUIT DIAGRAM”.

  • Page 405: Starter Motor

    – ELEC STARTER MOTOR EAS00767 STARTER MOTOR 5 Nm (0.5 m kg, 3.6 ft • • 10 Nm (1.0 m kg, 7.2 ft • • Order Job/Part Q’ty Remarks Removing the starter motor Remove the parts in the order listed. Crankcase-to-crankcase-breather- Disconnect.

  • Page 406

    – ELEC STARTER MOTOR Order Job/Part Q’ty Remarks Disassembling the starter motor Remove the parts in the order listed. Circlip Starter motor gear O-ring Front bracket Shims Lock washer Rear bracket Shims Brush holder assembly Brush Armature coil O-ring Starter motor yoke For assembly, reverse the disassembly procedure.

  • Page 407

    – ELEC STARTER MOTOR EAS00770 CHECKING THE STARTER MOTOR 1. Check: • commutator Dirt → Clean with 600 grit sandpaper. 2. Measure: • commutator diameter a Out of specification → Replace the starter motor. Commutator wear limit 27 mm (1.06 in) 3.

  • Page 408

    – ELEC STARTER MOTOR Pocket tester 90890-03112 Armature coil Commutator resistance 1 0.025 ~ 0.035 Ω at 20 °C (68 °F) Insulation resistance 2 Above 1 MΩ at 20 °C (68 °F) b. If any resistance is out of specification, replace the starter motor.

  • Page 409

    – ELEC STARTER MOTOR EAS00772 ASSEMBLING THE STARTER MOTOR 1. Install: • brush seat 1 NOTE: Align the tab a on the brush seat with the slot b in the starter motor yoke. 2. Install: • lock washer NOTE: Align the tabs a on the lock washer with the groves in the front bracket.

  • Page 410

    – ELEC CHARGING SYSTEM EAS00773 CHARGING SYSTEM CIRCUIT DIAGRAM 8 - 28...

  • Page 411

    – ELEC CHARGING SYSTEM EAS00774 EAS00738 TROUBLESHOOTING 1. Main fuse The battery is not being charged. • Check the main fuse for continuity. Refer to “CHECKING THE FUSES” in Check: chapter 3. 1. main fuse • Are the main fuse OK? 2.

  • Page 412: Charging System

    – ELEC CHARGING SYSTEM EAS00775 EAS00776 3. Charging voltage 4. Stator coil resistance • Connect the pocket tester (DC 20 V) to the • Disconnect the A.C. magneto coupler from battery as shown. the wire harness. • Connect the pocket tester (Ω × 1) to the Positive tester probe →...

  • Page 413

    – ELEC LIGHTING SYSTEM EAS00780 LIGHTING SYSTEM CIRCUIT DIAGRAM 8 - 31...

  • Page 414

    – ELEC LIGHTING SYSTEM EAS00781 EAS00738 TROUBLESHOOTING 1. Main, headlight, and parking lighting fuses Any of the following fail to come on: • Check the main, headlight, and parking headlight, high beam indicator light, tail/ lighting fuses for continuity. brake light, on auxiliary light. Refer to “CHECKING THE FUSES”...

  • Page 415: Lighting System

    – ELEC LIGHTING SYSTEM EAS00784 6. Headlight relay 4. Dimmer switch • Disconnect the headlight relay from the wire • Check the dimmer switch for continuity. harness. • Connect the pocket tester (Ω × 1) and bat- Refer to “CHECKING THE SWITCHES”. •...

  • Page 416

    – ELEC LIGHTING SYSTEM EAS00788 Headlight CHECKING THE LIGHTING SYSTEM Positive tester probe → 1. The headlight and the high beam indicator yellow 1 or green 2 light fail to come on. Negative tester probe → black 3 1. Headlight bulb and socket High beam indicator light Positive tester probe →...

  • Page 417

    – ELEC LIGHTING SYSTEM EAS00790 EAS00791 2. The tail/brake light fails to come on. 3. The auxiliary light fails to come on. 1. Tail/brake light bulb and socket 1. Auxiliary light bulb and socket • Check the tail/brake light bulb and socket •...

  • Page 418

    – ELEC LIGHTING SYSTEM 8 - 36...

  • Page 419

    – ELEC SIGNALING SYSTEM EAS00793 SIGNALING SYSTEM CIRCUIT DIAGRAM 8 - 37...

  • Page 420

    – ELEC SIGNALING SYSTEM 3 Neutral switch 4 Main switch 6 Battery 7 Main fuse A Backup fuse (immobilizer unit, meter assembly) F Front brake light switch G Relay unit K Fuel pump L ECU R Coolant temperature sensor S Speed sensor X Neutral indicator light Y Multifunction meter Z Coolant temperature warning light...

  • Page 421: Signaling System

    – ELEC SIGNALING SYSTEM EAS00794 EAS00739 TROUBLESHOOTING 2. Battery • Any of the following fail to come on: a • Check the condition of the battery. turn signal light, an indicator light, a Refer to “CHECKING AND CHARGING warning light, or the tail/brake light THE BATTERY”...

  • Page 422

    – ELEC SIGNALING SYSTEM EAS00796 3. Horn CHECKING THE SIGNALING SYSTEM 1. The horn fails to sound. • Disconnect the black connector at the horn terminal. 1. Horn switch • Connect a jumper lead 1 to the horn ter- • Check the horn switch for continuity. minal and ground the jumper lead.

  • Page 423

    – ELEC SIGNALING SYSTEM EAS00797 3. Voltage 2. The tail/brake light fails to come on. • Connect the pocket tester (DC 20 V) to the 1. Tail/brake light bulb and socket tail/brake light coupler (wire harness end) • Check the tail/brake light bulb and socket as shown.

  • Page 424

    – ELEC SIGNALING SYSTEM EAS00799 4. Hazard switch 3. The turn signal light, turn signal indicator light or both fail to blink. • Check the hazard switch for continuity. Refer to “CHECKING THE SWITCHES”. 1. Turn signal indicator light bulb and socket •...

  • Page 425

    – ELEC SIGNALING SYSTEM È É 6. Voltage • Connect the pocket tester (DC 20 V) to the turn signal/hazard relay coupler (wire har- ness end) as shown. Positive tester probe → brown/white 1 Negative tester probe → ground Ê Ch R/G Y G/W Y/L Dg G/L R/W...

  • Page 426

    – ELEC SIGNALING SYSTEM EAS00800 EAS00753 4. The neutral indicator light fails to come on. 3. Relay unit (diode) 1. Neutral indicator light LED • Disconnect the relay unit from the wire • Check the LED of the neutral indicator harness.

  • Page 427

    – ELEC SIGNALING SYSTEM EAS00803 4. Voltage 5. The fuel level warning light fails to come on. • Connect the pocket tester (DC 20 V) to the 1. Fuel level warning light LED meter assembly coupler (wire harness • Check the LED of the fuel level warning end) as shown.

  • Page 428

    – ELEC SIGNALING SYSTEM 6. The speedometer fails to come on. 3. Voltage 1. Voltage • Connect the pocket tester (DC 20 V) to the meter assembly coupler (wire harness • Connect the pocket tester (DC 20 V) to the end) as shown.

  • Page 429

    – ELEC SIGNALING SYSTEM 7. The coolant temperature warning light fails 2. Speed sensor to come on. • Connect the pocket tester (DC 20 V) to the 1. Coolant temperature warning light LED speed sensor coupler as shown. Positive tester probe → pink 1 •...

  • Page 430

    – ELEC SIGNALING SYSTEM EAS00812 3. Coolant temperature sensor • Remove the coolant temperature sensor from the engine. • Connect the pocket tester (Ω × 10) to the coolant temperature sensor 1 as shown. • Immerse the coolant temperature sensor in a container filled with coolant 2.

  • Page 431

    – ELEC COOLING SYSTEM EAS00807 COOLING SYSTEM CIRCUIT DIAGRAM 8 - 49...

  • Page 432

    – ELEC COOLING SYSTEM EAS00808 EAS00739 TROUBLESHOOTING 2. Battery The radiator fan motor fails to turn. • Check the condition of the battery. Refer to “CHECKING AND CHARGING Check: THE BATTERY” in chapter 3. 1. main, radiator fan motor, and ignition fuses 2.

  • Page 433

    – ELEC COOLING SYSTEM EAS00809 5. Radiator fan motor relay 4. Radiator fan motor • Disconnect the radiator fan motor relay • Disconnect the radiator fan motor coupler from the wire harness. • Connect the pocket tester (Ω × 1) and bat- from the wire harness.

  • Page 434

    – ELEC IMMOBILIZER SYSTEM EB805000 IMMOBILIZER SYSTEM CIRCUIT DIAGRAM 8 - 52...

  • Page 435

    – ELEC IMMOBILIZER SYSTEM GENERAL INFORMATION This motorcycle is equipped with an immobilizer system to help prevent theft by registering codes in standard keys. This system consists of the following: • a code re-registering key (with a red bow) • two standard keys (with a black bow) that can be re-registered with new codes •...

  • Page 436: Immobilizer System

    – ELEC IMMOBILIZER SYSTEM KEY CODE REGISTRATION The replacement of parts or code registration of a code re-registering key or standard key may be required in the following conditions. NOTE: Each standard key is registered during production, therefore, registering the keys at purchase is not necessary.

  • Page 437

    – ELEC IMMOBILIZER SYSTEM Standard key registration: A standard key should be registered or the other standard key should be re-registered when a reg- istered standard key has been lost. The standard keys must be re-registered when the immobilizer unit or ECU has been replaced and the code re-registering key has been re-registered. NOTE: Do not start the engine with a standard key that has not been registered.

  • Page 438

    – ELEC IMMOBILIZER SYSTEM 6. Check that the engine can be started with the two registered standard keys. Registration of the second standard key less than 5.0 s less than 5.0 s less than 5.0 s less than 5.0 s is complete.

  • Page 439

    – ELEC IMMOBILIZER SYSTEM SELF-DIAGNOSIS MALFUNCTION CODES When a system malfunction occurs, the malfunction code number is displayed on the multifunction display and is indicated by the immobilizer system indicator light flash patterns. Malfunction Part Symptom Cause Action code Immobilizer unit Code cannot be transmitted 1) Objects that interrupt radio 1) Keep magnets, metal,...

  • Page 440

    – ELEC IMMOBILIZER SYSTEM EAS00781 EAS00739 TROUBLESHOOTING 2. Battery The immobilizer system fails to operate. • Check the condition of the battery. (The immobilizer system indicator light Refer to “CHECKING AND CHARGING starts to flash in the self-diagnosis code THE BATTERY” in chapter 3. sequence.) Minimum open-circuit voltage Check:...

  • Page 441

    – ELEC IMMOBILIZER SYSTEM CHECKING THE IMMOBILIZER SYSTEM 3. Voltage 1. Immobilizer system indicator light does not • Connect the pocket tester (DC 20 V) to the go on when the main switch is set to “ON”. immobilizer unit coupler as shown. 1.

  • Page 442

    – ELEC IMMOBILIZER SYSTEM 4. Voltage 5. Voltage • Connect the pocket tester (DC 20 V) to the • Connect the pocket tester (DC 20 V) to the immobilizer unit coupler as shown. immobilizer unit coupler as shown. Positive tester probe → red/white 1 Positive tester probe →...

  • Page 443

    – ELEC IMMOBILIZER SYSTEM 2. The multifunction display is not indicated. 1. Voltage • Connect the pocket tester (DC 20 V) to the meter assembly couplers as shown. Ch R/G Y G/W Y/L Dg G/L R/W B/W Lg G G/L R/W B/W Lg Ch R/G Y G/W Y/L...

  • Page 444

    – ELEC IMMOBILIZER SYSTEM 3. When the main switch is set to “ON”, the immobilizer system indicator light flashes after 1 sec- ond. • Check if metal or other immobilizer system keys exists near the immobilizer unit. If found, remove the metal or keys, and then check the condition again.

  • Page 445

    SELF-DIAGNOSIS EAS00834 SELF-DIAGNOSIS The XT660R/XT660X features a self-diagnosing system for the following circuit: • Fuel sender (thermistor) If the circuit is defective, the condition code will be displayed on the fuel level warning light when the main switch is set to “ON” (irrespective of whether the engine is running or not).

  • Page 446

    – ELEC SELF-DIAGNOSIS EAS00835 EAS00838 TROUBLESHOOTING 1. Fuel sender (thermistor) CIRCUIT DIAGRAM The fuel level warning light starts to indi- cates the self-diagnosis sequence. R/L G/W Check: ( BLUE ) 1. fuel sender (thermistor) NOTE: ( BLUE ) ( DARK GREEN ) •...

  • Page 447

    – ELEC SELF-DIAGNOSIS EAS00842 3. Fuel sender (thermistor) • Disconnect the fuel sender coupler from the wire harness. • Connect the pocket tester (kΩ × 1) to the fuel sender as shown. Positive tester probe → green/white 1 Negative tester probe → black 2 •...

  • Page 449

    TRBL SHTG...

  • Page 450: Troubleshooting Trbl

    TRBL SHTG CHAPTER 9 TROUBLESHOOTING STARTING FAILURES..................9-1 ENGINE..................... 9-1 FUEL SYSTEM..................9-1 ELECTRICAL SYSTEMS ................9-2 INCORRECT ENGINE IDLING SPEED............9-2 ENGINE..................... 9-2 FUEL SYSTEM..................9-2 ELECTRICAL SYSTEMS ................9-2 POOR MEDIUM-AND-HIGH-SPEED PERFORMANCE .........9-3 ENGINE..................... 9-3 FUEL SYSTEM..................9-3 FAULTY GEAR SHIFTING................9-3 SHIFTING IS DIFFICULT ................9-3 SHIFT PEDAL DOES NOT MOVE ............

  • Page 451

    TRBL SHTG FAULTY LIGHTING OR SIGNALING SYSTEM..........9-6 HEADLIGHT DOES NOT COME ON ............9-6 HEADLIGHT BULB BURNT OUT.............. 9-6 TAIL/BRAKE LIGHT DOES NOT COME ON ..........9-6 TAIL/BRAKE LIGHT BULB BURNT OUT..........9-6 TURN SIGNAL DOES NOT COME ON ............ 9-6 TURN SIGNAL FLASHES SLOWLY ............9-6 TURN SIGNAL REMAINS LIT..............9-6 TURN SIGNAL FLASHES QUICKLY ............9-6 HORN DOES NOT SOUND ..............

  • Page 452: Troubleshooting

    TRBL STARTING FAILURES SHTG EAS00844 TROUBLESHOOTING NOTE: The following guide for troubleshooting does not cover all the possible causes of trouble. It should be helpful, however, as a guide to basic troubleshooting. Refer to the relative procedure in this man- ual for checks, adjustments, and replacement of parts.

  • Page 453: Incorrect Engine Idling Speed

    STARTING FAILURES/ TRBL INCORRECT ENGINE IDLING SPEED SHTG ELECTRICAL SYSTEMS Battery Ignition system • Discharged battery • Faulty ECU • Faulty battery • Faulty crankshaft position sensor Fuse(s) • Broken A.C. magneto rotor woodruff key • Blown, damaged or incorrect fuse Switches and wiring •...

  • Page 454: Faulty Gear Shifting

    POOR MEDIUM-AND-HIGH-SPEED PERFORMANCE/ TRBL FAULTY GEAR SHIFTING/FAULTY CLUTCH SHTG EAS00848 POOR MEDIUM-AND-HIGH-SPEED PERFORMANCE Refer to “STARTING FAILURES”. ENGINE FUEL SYSTEM Air filter Fuel pump • Clogged air filter element • Faulty fuel pump EAS00850 FAULTY GEAR SHIFTING SHIFTING IS DIFFICULT JUMPS OUT OF GEAR Refer to “CLUTCH DRAGS”.

  • Page 455: Poor Braking Performance

    OVERHEATING/OVERCOOLING/ TRBL POOR BRAKING PERFORMANCE SHTG EAS00855 OVERHEATING ENGINE FUEL SYSTEM Clogged coolant passages Throttle body • Cylinder head and piston • Faulty throttle body • Heavy carbon buildup • Damaged or loose throttle body joint Engine oil Air filter •...

  • Page 456: Unstable Handling

    FAULTY FRONT FORK LEGS/ TRBL UNSTABLE HANDLING SHTG EAS00861 FAULTY FRONT FORK LEGS LEAKING OIL MALFUNCTION • Bent, damaged or rusty inner tube • Bent or damaged inner tube • Cracked or damaged outer tube • Bent or damaged outer tube •...

  • Page 457: Faulty Lighting Or Signaling System

    TRBL FAULTY LIGHTING OR SIGNALING SYSTEM SHTG EAS00866 FAULTY LIGHTING OR SIGNALING SYSTEM HEADLIGHT DOES NOT COME ON TURN SIGNAL DOES NOT COME ON • Wrong headlight bulb • Faulty turn signal switch • Too many electrical accessories • Faulty turn signal/hazard relay •...

  • Page 458

    XT660R(S)/XT660X(S) 2004 WIRING DIAGRAM 1 Crankshaft position sensor y Parking lighting fuse 2 A.C. magneto z Immobilizer unit 3 Neutral switch { Anti-theft alarm (optional) 4 Main switch È Optional 5 Rectifier/regulator 6 Battery 7 Main fuse COLOR CODE 8 Starter relay B ....

  • Page 462

    XT660R(S)/XT660X(S) 2004 WIRING DIAGRAM Ch Lg MAIN HARNESS SUB-WIRE HARNESS Gy G/W G/W L/Y Br/R R/B O G/R Br/W B/L L/R W W W Br/R Br/R (GRAY) Br L/W R/B L/B R/L R/LR/B L/W L/R R/W L/G L/Y Sb B/Y Lg...

This manual also for:

Xt660s, Xt660x

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