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2016 q Read this manual carefully before operating this vehicle. q Il convient de lire attentivement ce manuel avant la première utilisation du véhicule. OWNER’S SERVICE MANUAL MANUEL D’ATELIER DU PROPRIETAIRE WR250F WR250FG 2GB-28199-71...
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Read this manual carefully before operating this vehicle. This manual should stay with this vehicle if it is sold. Il convient de lire attentivement ce manuel avant la première utilisation du véhicule. Le manuel doit être remis avec le véhicule en cas de vente de ce dernier.
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2016 2016 Read this manual carefully before operating this vehicle. Read this manual carefully before operating this vehicle. OWNER’S SERVICE MANUAL OWNER’S SERVICE MANUAL WR250F WR250F WR250FG WR250FG 2GB-28199-71-E0 2GB-28199-71-E0...
INTRODUCTION EAS2GB7003 Congratulations on your purchase of a Yamaha WR series. This model is the culmination of Yama- ha's vast experience in the production of pacesetting racing machines. It represents the highest grade of craftsmanship and reliability that have made Yamaha a leader.
SAFETY INFORMATION EAS2GB7005 THIS MACHINE IS DESIGNED STRICTLY FOR COMPETITION USE, ONLY ON A CLOSED COURSE. It is illegal for this machine to be operated on any public street, road, or highway. Off-road use on public lands may also be illegal. Please check local regulations before riding. •...
HOW TO USE THIS MANUAL EAS2GB7006 In this manual, descriptions of installation, removal, disassembly, assembly, check, and adjustment procedures are laid out with the individual steps in sequential order. • The manual is divided into chapters and each chapter is divided into sections. The current section title “1”...
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SYMBOLS EAS2GB7007 The following symbols are used in this manual for easier understanding. The following symbols are not relevant to every vehicle. SYMBOL DEFINITION SYMBOL DEFINITION Serviceable with engine mounted Gear oil Filling fluid Molybdenum disulfide oil Lubricant Brake fluid Special tool Wheel bearing grease Tightening torque...
TABLE OF CONTENTS GENERAL INFORMATION SPECIFICATIONS PERIODIC CHECKS AND ADJUSTMENTS TUNING CHASSIS ENGINE COOLING SYSTEM FUEL SYSTEM ELECTRICAL SYSTEM TROUBLESHOOTING...
GENERAL INFORMATION LOCATION OF IMPORTANT LABELS............1-1 DESCRIPTION....................1-4 IDENTIFICATION .....................1-5 VEHICLE IDENTIFICATION NUMBER ............1-5 ENGINE SERIAL NUMBER ...............1-5 VEHICLE EMISSION CONTROL INFORMATION LABEL......1-5 INCLUDED PARTS ..................1-6 SPARK PLUG WRENCH ................1-6 NIPPLE WRENCH..................1-6 HANDLEBAR PROTECTOR ..............1-6 FUEL HOSE JOINT COVER ..............1-6 COUPLER FOR CONNECTING OPTIONAL PART........1-6 IMPORTANT INFORMATION ................1-7 PREPARATION FOR REMOVAL AND DISASSEMBLY......1-7 REPLACEMENT PARTS................1-7...
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MULTI-FUNCTION DISPLAY.................1-22 DESCRIPTION ..................1-22 BASIC MODE ...................1-22 CHANGEOVER TO BASIC MODE/RACE MODE........1-23 RACE MODE....................1-24 FUNCTION DIAGRAM ................1-28 STARTING AND BREAK-IN ................1-30 FUEL ......................1-30 HANDLING NOTE ..................1-30 AIR FILTER MAINTENANCE ..............1-30 STARTING A COLD ENGINE ..............1-30 STARTING A WARM ENGINE..............1-31 BREAK-IN PROCEDURES ..............1-32 MAINTENANCE AFTER BREAK-IN ..............1-33 MAJOR MAINTENANCE................1-33 TORQUE-CHECK POINTS ................1-34...
LOCATION OF IMPORTANT LABELS LOCATION OF IMPORTANT LABELS EAS2GB7008 Please read the following important labels carefully before operating this vehicle. 1,2,3 4,5,6 9,10,11...
There are two significant reasons for knowing the serial number of your vehicle: 1. When ordering parts, you can give the num- ber to your Yamaha dealer for positive iden- tification of the model you own. 2. If your vehicle is stolen, the authorities will need the number to search for and identify your vehicle.
INCLUDED PARTS INCLUDED PARTS FUEL HOSE JOINT COVER EAS2GB7014 EAS2GB7018 The fuel hose joint covers “1” are used to pre- EAS2GB7015 SPARK PLUG WRENCH vent mud, dust, and other foreign materials The spark plug wrench “1” is used to remove or from entering the inside when the fuel hose is install the spark plug.
2. Use proper special tools and equipment. used for repair of the vehicle, including periodic See “SPECIAL TOOLS”. replacement parts, are new YAMAHA genuine parts and recommended parts. Do not use any used parts, because these may not be genuine though they have similar ap- pearances or because the quality may be changed by aging.
IMPORTANT INFORMATION GASKETS, OIL SEALS AND O-RINGS EAS2GB7022 1. When overhauling the engine, replace all gaskets and O-rings. All gasket surfaces, oil seal lips, and O-rings must be cleaned so that there may be no dust on them. 2. During assembly, always apply proper oil to bearings and proper grease to oil seal lips before installation.
BASIC SERVICE INFORMATION BASIC SERVICE INFORMATION EAS2GB7026 EAS2GB7027 ELECTRICAL SYSTEM Electrical parts handling NOTICE Never disconnect a battery lead while the engine is running; otherwise, the electrical components could be damaged. NOTICE Be sure to connect the battery leads to the correct battery terminals.
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BASIC SERVICE INFORMATION NOTICE Checking the electrical system Handle electrical components with special care, and do not subject them to strong Before checking the electrical system, make shocks. sure that the battery voltage is at least 12 V. NOTICE NOTICE Electrical components are very sensitive to Never insert the tester probes into the cou- and can be damaged by static electricity.
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BASIC SERVICE INFORMATION 2. Check: • Lead • Coupler • Connector Moisture Dry with compressed air. Rust/stains Connect and disconnect sev- eral times. Checking the connections Check the leads, couplers, and connectors for stains, rust, moisture, etc. 1. Disconnect: •...
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BASIC SERVICE INFORMATION 4. Connect: • Lead • Coupler • Connector • When connecting a coupler or connector, make sure that both terminals are connected securely. • Make sure all connections are tight. 5. Check: • No continuity Pocket tester 90890-03112 Analog pocket tester YU-03112-C...
SPECIAL TOOLS SPECIAL TOOLS EAS2GB7028 The following special tools are required for accurate and complete adjustment and assembly. Using the correct special tool will help prevent damage caused by the use of improper tools or improvised techniques. The shape and tool number used for the special tool differ by country, so two types are provided.
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SPECIAL TOOLS Tool name/Part number How to use Illustration Radiator cap tester This tool is used to check the 90890-01325 radiator and the radiator cap. Mityvac cooling system tester YU-24460-A Radiator cap tester adapter This tool is used to check the 90890-01352 radiator and the radiator cap.
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Test harness– lean angle sensor (6P) FI diagnostic tool sub–lead This tool is used to connect 90890-03212 the Yamaha diagnostic tool FI diagnostic tool sub–lead to a battery. YU-03212 Test harness– speed sensor This tool is used to check the 5TJ (3P) speed sensor output voltage.
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SPECIAL TOOLS Tool name/Part number How to use Illustration Valve spring compressor This tool is used to discon- 90890-04019 nect or connect the valve and Valve spring compressor the valve spring. YM-04019 YM-04019 Spacer (crankshaft installer) This tool is used to install the 90890-04081 crankshaft.
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SPECIAL TOOLS Tool name/Part number How to use Illustration Valve lapper This tool is used to remove 90890-04101 the valve lifter or lap the Valve lapping tool valve. YM-A8998 Valve spring compressor at- This tool is used to discon- tachment nect or connect the valve and 90890-04108 the valve spring.
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Tool name/Part number How to use Illustration Digital tachometer This tool is used to measure 90890-06760 the engine speed. Digital tachometer YU-39951-B Yamaha bond No. 1215 This sealant (Bond) is used 90890-85505 for crankcase mating sur- (Three bond No.1215®) face, etc. 1-18...
Pull the clutch lever toward the handlebar to ing the engine. If this occurs, have a Yamaha disengage the clutch, and release the lever to dealer check the vehicle.
CONTROL FUNCTIONS SHIFT PEDAL THROTTLE GRIP EAS2GB7034 EAS2GB7036 The shift pedal “1” has adopted a method of 1 The throttle grip “1” is located on the right han- down & 5 ups (press-down & kick-ups). dlebar. The throttle grip accelerates or deceler- Press it down for N (neutral) to 1st, and kick it ates the engine.
CONTROL FUNCTIONS SIDESTAND FUEL TANK CAP EAS2GB7039 EAS2GB7041 This sidestand “1” is used to support only the Fuel tank cap “1” is located under the fuel tank machine when standing or transporting it. cap cover “2”. Remove the fuel tank cap cover to open the fuel WARNING tank cap.
MULTI-FUNCTION DISPLAY MULTI-FUNCTION DISPLAY BASIC MODE EAS2GB7042 EAS2GB7044 Changing speedometer display (for U.K.) WARNING Be sure to stop the machine before making 1. Push the “SLCT2” button for 2 seconds or any setting changes to the multi-function more to change the speedometer units. The display.
MULTI-FUNCTION DISPLAY 4. To end the setting, push the “RST” button for CHANGEOVER TO BASIC MODE/RACE EAS2GB7045 2 seconds or more. MODE • In a 30-second absence of button operation, • Measurement using the timer function can be the setting will come to an end with the indi- made in RACE MODE.
MULTI-FUNCTION DISPLAY Returning to BASIC MODE from RACE Manual start MODE Initial setting at changeover to RACE MODE It is possible to return to BASIC MODE with tim- will remain for manual start. er measurement at a stop. 1. Check that changeover to RACE MODE has 1.
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MULTI-FUNCTION DISPLAY Resetting tripmeter A (TRIP A) 1. Check that the timer is in operation. If the timer is not in operation, start the timer by pushing the “SLCT1” button and “SLCT2” button at the same time. 2. Reset tripmeter A (TRIP A) display by push- ing the “RST”...
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MULTI-FUNCTION DISPLAY Correcting tripmeter A (TRIP A) 1. Change the travel distance display by push- ing the “SLCT1” button (plus) or “SLCT2” button (minus). A long push on the button will fast-forward the change. Change can be made any time while timer measurement is or is not being made.
MULTI-FUNCTION DISPLAY FUNCTION DIAGRAM EAS2GB7047 A short push on the button changes the operation in the arrowed direction. Meter function A short push on the button changes the operation in both arrowed directions. Function that can be performed whether the time is or is not in operation. A long push on the button changes the operation in the arrowed direction.
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MULTI-FUNCTION DISPLAY A.A short push on the button changes the oper- ation in the arrowed direction. B.A short push on the button changes the oper- ation in both arrowed directions. C.A long push on the button changes the oper- ation in the arrowed direction. D.A long push on the button changes the oper- ation in both arrowed directions.
NOTICE For maximum engine life, never accelerate hard when the engine is cold! Your Yamaha engine has been designed to use premium unleaded gasoline with a pump oc- In order for the ignition circuit cut-off system to tane number [(R+M)/2] of 91 or higher, or a re-...
STARTING AND BREAK-IN Starting with the kickstarter NOTICE When using the kickstarter to start the engine, If the starter motor will not turn when the follow the procedures as described below. start switch is pushed, stop pushing it im- 1. Fold out the kickstarter lever, push it down mediately in order to avoid placing extra lightly with your foot until resistance is felt.
STARTING AND BREAK-IN BREAK-IN PROCEDURES EAS2GB7054 A break-in is important so that rotating portion, sliding surfaces, and mounted areas may fit one another, and that the rider may become ac- customed to the machine. NOTICE Before running, do maintenance on the air filter element.
MAINTENANCE AFTER BREAK-IN • Cable MAINTENANCE AFTER BREAK-IN EAS2GB7055 Grease and adjust cables. After a break-in, perform careful maintenance • Drive chain to get ready for the next practice or race. Lubricate the drive chain and adjust its ten- Refer to “PRE-OPERATION INSPECTION sion.
TORQUE-CHECK POINTS TORQUE-CHECK POINTS EAS2GB7057 Frame construction Frame to rear frame Frame to engine protector Combined seat and fuel tank Fuel tank to frame Engine mounting Frame to engine Engine bracket to engine Engine bracket to frame Seat Seat to frame Steering Steering stem to handlebar Steering stem to frame...
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TORQUE-CHECK POINTS Fuel system Fuel pump to fuel tank Fuel sender to fuel tank Plastic cover Tightening of front fender Tightening of fork leg protector Tightening of air scoop Left cover to rear frame Tightening of side cover Tightening of rear fender Tightening of mud flap Tightening of rear brake disc cov- Tightening of rear brake caliper...
MOTORCYCLE CARE AND STORAGE • Do not use any harsh chemical products MOTORCYCLE CARE AND STOR- EAS2GB7058 on plastic parts. Be sure to avoid using cloths or sponges which have been in con- tact with strong or abrasive cleaning prod- CARE EAS2GB7059 ucts, solvent or thinner, fuel (gasoline),...
MOTORCYCLE CARE AND STORAGE 2. Apply a corrosion protection spray on all metal, including chrome- and nickel-plated, • Consult a Yamaha dealer for advice on what surfaces to prevent corrosion. products to use. • Washing, rainy weather or humid climates After cleaning can cause the headlight lens to fog.
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MOTORCYCLE CARE AND STORAGE e. Remove the spark plug cap from the spark plug, and then install the spark plug and the spark plug cap. WARNING! To prevent damage or injury from sparking, make sure to ground the spark plug electrodes while turning the engine over.
ENGINE SPECIFICATIONS ENGINE SPECIFICATIONS EAS2GB7062 Engine Engine type Liquid cooled 4-stroke, DOHC Displacement 250 cm Cylinder arrangement Single cylinder Bore stroke 77.0 53.6 mm (3.0 2.1 in) Compression ratio 13.5:1 Starting system Electric starter and kickstarter Fuel Recommended fuel Premium unleaded gasoline only Fuel tank capacity...
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ENGINE SPECIFICATIONS Cylinder head Combustion chamber volume 12.07–12.87 cm (0.74–0.79 cu.in) Warpage limit 0.05 mm (0.0020 in) Camshaft Drive system Chain drive (left) Camshaft cap inside diameter 22.000–22.021 mm (0.8661–0.8670 in) Camshaft journal diameter 21.959–21.972 mm (0.8645–0.8650 in) Camshaft-journal-to-camshaft-cap clearance 0.028–0.062 mm (0.0011–0.0024 in) Camshaft lobe dimensions Lobe height (Intake)
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ENGINE SPECIFICATIONS Valve spring Free length (intake) 36.69 mm (1.44 in) Limit 35.69 mm (1.41 in) Free length (exhaust) 34.86 mm (1.37 in) Limit 33.86 mm (1.33 in) Installed length (intake) 31.40 mm (1.24 in) Installed length (exhaust) 28.50 mm (1.12 in) Spring rate K1 (intake) 29.65 N/mm (3.02 kgf/mm, 169.30 lbf/in) Spring rate K2 (intake)
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ENGINE SPECIFICATIONS Balancer Balancer drive method Gear Clutch Clutch type Wet, multiple-disc Clutch release method Inner push, cam push Clutch lever free play 7.0–12.0 mm (0.28–0.47 in) Friction plate thickness 2.90–3.10 mm (0.114–0.122 in) Wear limit 2.85 mm (0.112 in) Plate quantity 9 pcs Clutch plate thickness...
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ENGINE SPECIFICATIONS Throttle body Type/quantity 30RA-A95R/1 ID mark 2GB1 00 Fuel line pressure at idling 324.0 kPa (3.24 kgf/cm , 47.0 psi) Throttle position sensor Resistance 6.30 k Output voltage (at idle) 0.5 V Fuel injection sensor 228–342 (Gy–B) Crankshaft position sensor resistance Intake air pressure sensor output voltage 3.61–3.67 V at 101.3 kPa (3.61–3.67 V at 1.01...
TIGHTENING TORQUES TIGHTENING TORQUES EAS20320 EAS2GB7065 GENERAL TIGHTENING TORQUE SPECIFI- CATIONS This chart specifies tightening torques for stan- dard fasteners with a standard ISO thread pitch. Tightening torque specifications for spe- cial components or assemblies are provided for each chapter of this manual. To avoid warpage, tighten multi-fastener assemblies in a criss- cross pattern and progressive stages until the specified tightening torque is reached.
LUBRICATION POINTS AND LUBRICANT TYPES Lubrication point Lubricant types Shift lever assembly moving parts Damper assembly shaft, thrust surfaces, washers Starter idle gear inner surface, thrust surfaces Starter clutch drive gear inner surface, thrust surfaces Three bond Cylinder head cover gasket No.1215®...
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LUBRICATION POINTS AND LUBRICANT TYPES Lubrication point Lubricant types Clutch lever adjuster rubber lip Clutch cable end (clutch lever side) Tube guide (throttle grip) inner surface and throttle cable end Front brake caliper piston Front brake caliper piston seal Front brake caliper dust seal Front brake caliper piston outer surface Front brake caliper pin bolt and boot Front brake master cylinder push rod end...
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CABLE ROUTING DIAGRAM N. Place the grommet of the clutch cable so that it 1. Clutch cable contacts the radiator hose. Route the clutch cable 2. Throttle cable (return) outside the neutral switch lead, AC magneto lead 3. Throttle cable (pull) and starter motor lead.
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CABLE ROUTING DIAGRAM 1. Clamp 2. Cylinder head breather hose 3. Throttle position sensor lead 4. Joint coupler 5. Intake air temperature sensor coupler 6. Intake air pressure sensor lead 7. Wire harness 8. Injector lead 9. Throttle body 10. Injector coupler 11.
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CABLE ROUTING DIAGRAM 1. Brake master cylinder 2. Brake hose holder 3. Brake hoses A. While installing the brake hose, direct a bend in its pipe portion as shown, and bring it into contact with the projection on the brake caliper. B.
PERIODIC CHECKS AND ADJUSTMENTS PERIODIC MAINTENANCE ................3-1 INTRODUCTION ..................3-1 PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL SYSTEM .................3-1 GENERAL MAINTENANCE AND LUBRICATION CHART ......3-2 MAINTENANCE INTERVALS FOR COMPETITION USE ......3-4 PRE-OPERATION INSPECTION AND MAINTENANCE.........3-9 GENERAL INSPECTION AND MAINTENANCE........3-9 ENGINE ......................3-10 CHECKING THE COOLANT LEVEL............3-10 CHECKING THE COOLING SYSTEM .............3-10 CHANGING THE COOLANT..............3-10...
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ADJUSTING THE REAR SHOCK ABSORBER ASSEMBLY....3-33 CHECKING THE TIRES................3-35 CHECKING AND TIGHTENING THE SPOKES........3-35 CHECKING THE WHEELS ..............3-36 CHECKING THE WHEEL BEARINGS .............3-36 CHECKING AND ADJUSTING THE STEERING HEAD ......3-36 CHECKING AND LUBRICATING THE CABLES ........3-37 LUBRICATING THE LEVERS ..............3-37 LUBRICATING THE PEDAL ..............3-37 LUBRICATING THE DRIVE CHAIN ............3-38 LUBRICATING THE SIDESTAND............3-38...
• From 4200 mi (7000 km) or 9 months, repeat the maintenance intervals starting from 1800 mi (3000 km) or 3 months. • Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical skills.
PERIODIC MAINTENANCE GENERAL MAINTENANCE AND LUBRICATION CHART EAS2GB7077 ODOMETER READ- INITIAL INGS 600 mi 1800 mi 3000 mi ITEM CHECKS AND MAINTENANCE JOBS (1000 (3000 (5000 km) or 1 km) or 3 km) or 6 month months months • Check operation. ...
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Rear sus- • Apply molybdenum disulfide grease pension link lightly. pivots Control ca- • Apply Yamaha chain and cable lube or bles engine oil 10W-30 thoroughly. • Check operation and free play. Throttle grip • Adjust the throttle cable free play if ...
If you are a doubt as to what intervals to follow in maintaining and lubricating your machine, consult your Yamaha dealer. • Periodic inspection is essential in making full use of the machine performance. The service life of the parts varies substantially according to the environment in which the machine runs (e.g., rain,...
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PERIODIC MAINTENANCE Every Every After third fifth Every As re- ITEM break- Remarks race quired 1,000 PISTON PIN Inspect Replace CYLINDER HEAD Inspect carbon deposits and Inspect and clean eliminate them. Change gasket. CYLINDER Inspect score marks. Inspect and clean Inspect wear.
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PERIODIC MAINTENANCE Every Every After third fifth Every As re- ITEM break- Remarks race quired 1,000 COOLING SYSTEM Check coolant lev- el and leakage Check radiator cap operation Replace coolant Every two years Inspect hoses OUTSIDE NUTS AND BOLTS Refer to “STARTING AND Retighten BREAK-IN”...
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PERIODIC MAINTENANCE Every Every After third fifth Every As re- ITEM break- Remarks race quired 1,000 BRAKES Adjust lever posi- tion and pedal height Lubricate pivot point Check brake disc surface Check fluid level and leakage Retighten brake disc bolts, caliper bolts, master cylin- der bolts and union bolts...
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TIRE, WHEELS Inspect air pres- sure, wheel run- out, tire wear and spoke looseness Retighten sprocket bolt Inspect bearings Replace bearings Lubricate Lithium-soap-based grease THROTTLE, CON- TROL CABLE Check routing and connection Yamaha cable lube or SAE Lubricate 10W-30 motor oil...
PRE-OPERATION INSPECTION AND MAINTENANCE PRE-OPERATION INSPECTION AND MAINTENANCE EAS2GB7079 Before riding for break-in operation, practice or a race, make sure the machine is in good operating condition. Before using this machine, check the following points. GENERAL INSPECTION AND MAINTENANCE EAS2GB7080 ITEM inspect Page...
ENGINE ENGINE CHECKING THE COOLING SYSTEM EAS2GB7081 EAS2GB7083 1. Remove: EAS2GB7082 CHECKING THE COOLANT LEVEL • Seat • Side cover (left/right) WARNING • Air scoop (left/right) If coolant seems hot, do not remove the ra- Refer to “GENERAL CHASSIS” on page 5- diator cap.
ENGINE CHECKING THE COOLANT CIRCULATORY ADJUSTING THE CLUTCH LEVER FREE EAS2GB7087 EAS2GB7088 SYSTEM FOR LEAKS PLAY 1. Check: 1. Check: • Coolant level • Clutch lever free play “a” Out of specification Regulate. 2. Install: • Radiator cap tester “1” Clutch lever free play •...
ENGINE c. Turn the adjuster “2” in direction “a” or “b” 2. Adjust: until the specified clutch lever free play is ob- • Throttle grip free play tained. ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼ a. Loosen the locknut “1”. Direction “a” b. Turn the adjuster “2” until the specified free Clutch lever free play is increased.
ENGINE 2. Lubricate: 2. Remove: • Throttle cable end “a” • Air filter mounting bolt “1” • Air filter element “2” Recommended lubricant • Air filter guide “3” (from the air filter element) Lithium-soap-based grease 3. Wash: • Air filter element 3.
ENGINE 6. Install: • Air filter guide “1” (to the air filter element) • Air filter element “2” • Air filter mounting bolt “3” Air filter mounting bolt 2.0 Nm (0.20 m·kgf, 1.4 ft·lbf) CHECKING THE EXHAUST SYSTEM EAS2GB7094 1. Remove: •...
ENGINE CHECKING THE ENGINE OIL LEVEL EAS2GB7096 1. Stand the vehicle upright on a level surface. 2. Start the engine, warm this up for 3 minutes, and then stop the engine and wait about 5 minute. 3. Check: • Oil level The engine oil level should be between the minimum level mark “a”...
ENGINE 5. To check the oil strainer, perform the follow- CHANGING THE ENGINE OIL EAS2GB7097 ing procedure. Stand the vehicle upright on a level surface. 1. Start the engine, warm this up for 3 minutes, ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼ a. Remove the oil strainer “1”. and then stop the engine and wait about 5 b.
ENGINE 8. Install: ADJUSTING THE ENGINE IDLING SPEED EAS2GB7098 • Oil filler cap 9. Check: • Because the air pressure is lower at high alti- • Oil level tudes, the air-fuel mixture will become richer. Refer to “CHECKING THE ENGINE OIL If the idling speed is low, turn the starter knob/ LEVEL”...
• This section is intended for those who have Valve clearance (cold) basic knowledge and skill concerning the ser- Intake vicing of Yamaha motorcycles (e.g., Yamaha 0.12–0.19 mm (0.0047–0.0075 in) dealers, service engineers, etc.). Those who Exhaust have little knowledge and skill concerning ser- 0.17–0.24 mm (0.0067–0.0094 in)
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ENGINE Check that the alignment mark “c” on the cam- • Place a cloth in the timing chain space to pre- shaft sprocket and the alignment mark “d” on vent adjusting pads from falling into the crank- the intake camshaft sprocket are aligned with case.
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ENGINE d. Select an adjusting pad with a proper valve f. Install the camshafts (exhaust and intake). clearance from the adjusting pad selection Refer to “CAMSHAFT” on page 6-11. table. g. Measure the valve clearance again. h. If the valve clearance is out of specification, repeat adjusting the valve clearance until it •...
CHASSIS CHASSIS EAS2GB7101 EAS2GB7102 BLEEDING THE BRAKE SYSTEM WARNING Bleed the brake system whenever: • The system is disassembled. • A brake hose is loosened, disconnected, or replaced. • The brake fluid level is very low. • Brake operation is faulty. A.
CHASSIS CHECKING THE BRAKE HOSE EAS2GB7103 1. Check: • Brake hose “1” Cracks/damage/wear Replace. 2. Remove: • Brake lever cover 3. Adjust: • Brake lever position ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼ a. Loosen the locknut “1”. b. Turn the adjusting bolt “2” in direction “a” or “b”...
CHASSIS ADJUSTING THE REAR BRAKE EAS2GB7105 NOTICE 1. Check: After adjusting the brake pedal position, • Brake pedal position “a” make sure that there is no brake drag. (distance from the top of the rider footrest to the top of the brake pedal) ▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲...
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CHASSIS d. Remove the pad pin and brake pads “4”. i. Install the brake caliper “8” and tighten the pad pin “9”. Bolt (brake caliper) 23 Nm (2.3 m·kgf, 17 ft·lbf) Pad pin 17 Nm (1.7 m·kgf, 12 ft·lbf) e. Connect the plastic hose “5” to the bleed screw “6”...
CHASSIS CHECKING THE REAR BRAKE PADS EAS2GB7107 1. Measure: • Brake pad thickness “a” Out of specification Replace as a set. The pads worn up to the indicator “b” grooves mean that the brake pad thickness limit is reached. Brake pad lining thickness (inner) d.
CHASSIS system. Refer to “BLEEDING THE BRAKE SYS- TEM” on page 3-24. CHECKING THE REAR BRAKE PAD INSU- EAS2GB7108 LATOR 1. Remove: • Brake pads Refer to “REAR BRAKE” on page 5-23. 2. Check: • Rear brake pad insulator “1” i.
CHASSIS WARNING • Use only the designated brake fluid. Other brake fluids may cause the rubber 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 flu- ids may result in a harmful chemical reac- tion, leading to poor brake performance.
CHASSIS CHECKING THE FRONT FORK LEGS CLEANING THE FRONT FORK OIL SEAL EAS2GB7111 EAS2GB7113 1. Stand the vehicle upright on a level surface. AND DUST SEAL 1. Remove: WARNING • Protector Securely support the vehicle so that there is • Dust seal “1” no danger of it falling over.
CHASSIS 3. Tighten: • Air bleed screw Air bleed screw 1.3 Nm (0.13 m·kgf, 0.94 ft·lbf) ▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲ Compression damping NOTICE Do not turn the adjuster forcibly beyond its adjusting range. EAS2GB7115 ADJUSTING THE FRONT FORK LEGS 1. Adjust: WARNING • Compression damping •...
CHASSIS Spring preload CHECKING THE SWINGARM OPERATION EAS2GB7116 1. Check: NOTICE • Swingarm smooth action Do not turn the adjuster forcibly beyond its • Swingarm free play adjusting range. Refer to “SWINGARM” on page 5-65. 1. Remove: EAS2GB7117 CHECKING THE REAR SUSPENSION •...
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CHASSIS Rebound damping adjusting posi- • Be sure to remove all dirt and mud from tions around the locknut and adjusting ring before Maximum Fully turned in adjustment. Standard • The length of the spring (installed) changes 14 clicks out* 1.5 mm (0.06 in) per turn of the adjusting ring.
CHASSIS 2. Tighten: CHECKING AND ADJUSTING THE STEER- • Spokes ING HEAD Use a spoke nipple wrench “1” for tighten- 1. Use a suitable stand to raise the front wheel ing. off the ground. WARNING Securely support the vehicle so that there is no danger of it falling over.
CHASSIS CHECKING AND LUBRICATING THE CA- EAS2GB7124 Steering nut wrench BLES 90890-01403 The following procedure applies to all of the in- Exhaust flange nut wrench ner and outer cables. YU-A9472 WARNING Damaged outer cable may cause the cable Ring nut (initial tightening torque) 38 Nm (3.8 m·kgf, 27 ft·lbf) to corrode and interfere with its movement.
CHASSIS LUBRICATING THE DRIVE CHAIN EAS2GB7127 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 vehicle is used in dusty areas. This vehicle has a drive chain with small rubber O-rings between each side plate.
ELECTRICAL SYSTEM 5. Clean: ELECTRICAL SYSTEM EAS2GB7130 • Spark plug (with a spark plug cleaner or a wire brush) EAS2GB7131 CHECKING THE SPARK PLUG 6. Measure: 1. Remove: • Spark plug gap “a” • Seat Out of specification Adjust the spark plug •...
ELECTRICAL SYSTEM 2. Attach: CHECKING AND CHARGING THE BATTERY EAS2GB7133 • Timing light “1” Refer to “CHECKING AND CHARGING THE • Digital tachometer “2” BATTERY” on page 9-69. To the high tension code “3”. EAS2GB7134 REPLACING THE HEADLIGHT BULB Timing light WARNING 90890-03141 Since the headlight bulb gets extremely hot,...
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ELECTRICAL SYSTEM 4. Install: • Headlight bulb Fasten the new headlight bulb with the headlight bulb holder. NOTICE 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.
TUNING CHASSIS ......................4-1 SELECTION OF THE SECONDARY REDUCTION RATIO (SPROCKET) ....................4-1 DRIVE AND REAR WHEEL SPROCKETS SETTING PARTS ....4-1 TIRE PRESSURE..................4-1 FRONT FORK SETTING................4-2 CHANGE IN AMOUNT AND CHARACTERISTICS OF FORK OIL....4-2 SETTING OF SPRING AFTER REPLACEMENT ........4-2 FRONT FORK SETTING PARTS...............4-3 REAR SUSPENSION SETTING ..............4-3 CHOOSING SET LENGTH ................4-3 SETTING OF SPRING AFTER REPLACEMENT ........4-4...
CHASSIS CHASSIS DRIVE AND REAR WHEEL SPROCKETS EAS2GB7136 EAS2GB7138 SETTING PARTS EAS2GB7137 SELECTION OF THE SECONDARY REDUC- Part name Type Part number TION RATIO (SPROCKET) Drive sprocket “1” Secondary reduction ratio = Number of (STD) 13T 9383B-13218 rear wheel sprocket teeth/Number of drive sprocket teeth Rear wheel sprock- et “2”...
CHASSIS • Under a stony or a hard road condition, the tire pressure should be higher to prevent a flat tire. Extent of adjustment 100–120 kPa (1.00–1.20 kgf/cm 15–18 psi) FRONT FORK SETTING EAS2GB7140 The front fork setting should be made depend- ing on the rider’s feeling of an actual run and the circuit conditions.
CHASSIS REAR SUSPENSION SETTING EAS2GB7144 The rear shock absorber setting should be Generally a stiff spring gives a stiff riding feel- made depending on the rider’s feeling of an ac- ing. Rebound damping tends to become weak- tual run and the circuit conditions. er, resulting in lack of a sense of contact with The rear suspension setting includes the fol- the road surface or in a vibrating handlebar.
CHASSIS Length “a” of standard shock • If the machine is new and after it is broken in, 462.5 mm (18.21 in) the same set length of the spring may change because of the initial fatigue, etc. of the spring. Therefore, be sure to make reevalua- tion.
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CHASSIS • Spring preload adjusting positions Spring preload adjusting positions Minimum Position in which the spring is turned in 1.5 mm (0.06 in) from its free length. Standard Position in which the spring is turned in 10 mm (0.39 in) from its free length.
CHASSIS SUSPENSION SETTING (FRONT FORK) EAS2GB7148 • If any of the following symptoms is experienced with the standard position as the base, make reset- ting by reference to the adjustment procedure given in the same chart. • Before any change, set the rear shock absorber sunken length to the standard figure 90–100 mm (3.5–3.9 in).
CHASSIS Section Medi- Symptom Check Adjust Large Small Jump Compression Turn adjuster clockwise (about damping force 2 clicks) to increase damping. Rebound Turn adjuster counterclock- damping force wise (about 2 clicks) to de- crease damping. Low front, tend- ing to lower Balance with Set sunken length for 95–100 front posture...
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CHASSIS Section Medi- Symptom Check Adjust Large Small Jump Rebound Turn adjuster counterclock- damping force wise (about 2 clicks) to de- Heavy and crease damping. dragging Spring Replace with soft spring. Rebound Turn adjuster counterclock- damping force wise (about 2 clicks) to de- crease damping.
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CHASSIS GENERAL CHASSIS..................5-1 REMOVING THE LEFT SIDE COVER............5-3 REMOVING THE SEAT ................5-3 FRONT WHEEL....................5-4 REMOVING THE FRONT WHEEL.............5-5 CHECKING THE FRONT WHEEL .............5-5 DISASSEMBLING THE FRONT WHEEL...........5-6 ASSEMBLING THE FRONT WHEEL............5-6 INSTALLING THE FRONT WHEEL ............5-7 REAR WHEEL ....................5-9 REMOVING THE REAR WHEEL .............5-10 CHECKING THE REAR WHEEL..............5-10 DISASSEMBLING THE REAR WHEEL ...........5-10 CHECKING AND REPLACING THE REAR WHEEL SPROCKET ..5-10...
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HANDLEBAR ....................5-33 REMOVING THE HANDLEBAR...............5-35 CHECKING THE HANDLEBAR ...............5-35 INSTALLING THE HANDLEBAR .............5-35 FRONT FORK....................5-40 REMOVING THE FRONT FORK LEGS...........5-42 DISASSEMBLING THE FRONT FORK LEGS .........5-42 CHECKING THE FRONT FORK LEGS ...........5-43 ASSEMBLING THE FRONT FORK LEGS ..........5-44 INSTALLING THE FRONT FORK LEGS ..........5-50 STEERING HEAD...................5-53 REMOVING THE LOWER BRACKET............5-55 CHECKING THE STEERING HEAD ............5-55...
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This section is intended for those who have basic knowledge and skill concerning the servicing of Yamaha motorcycles (e.g., Yamaha dealers, service engineers, etc.). Those who have little knowl- edge and skill concerning servicing are requested not to undertake inspection, adjustment, disas- sembly, or reassembly only by reference to this manual.
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GENERAL CHASSIS Removing the headlight assembly and multi-function meter 21 Nm (2.1 m kgf, 15 ft Ibf) 7 Nm (0.7 m kgf, 5.1 ft Ibf) 3.8 Nm (0.38 m kgf, 2.8 ft Ibf) 7 Nm (0.7 m kgf, 5.1 ft Ibf) 21 Nm (2.1 m kgf, 15 ft Ibf) 3.8 Nm (0.38 m kgf, 2.8 ft Ibf) Order...
GENERAL CHASSIS REMOVING THE LEFT SIDE COVER EAS2GB7152 1. Remove: • Bolt (side cover) • Side cover “1” Draw the left side cover “1” backward to re- move it because its projection “a” is inserted in the rear frame. EAS2GB7153 REMOVING THE SEAT The fuel tank cap cover and the seat are cou- pled with each other with a plastic band.
FRONT WHEEL FRONT WHEEL EAS2GB7154 Removing the front wheel 21 Nm (2.1 m kgf, 15 ft Ibf) 21 Nm (2.1 m kgf, 15 ft Ibf) 90 Nm (9.0 m kgf, 65 ft lbf) 12 Nm (1.2 m kgf, 8.7 ft Ibf) Order Part name Q’ty...
FRONT WHEEL REMOVING THE FRONT WHEEL EAS2GB7155 1. Use a suitable stand to raise the front wheel A tight spoke will emit a clear, ringing tone; a off the ground. loose spoke will sound flat. WARNING 4. Tighten: Securely support the vehicle so that there is •...
FRONT WHEEL DISASSEMBLING THE FRONT WHEEL EAS2GB7157 NOTICE 1. Remove: Install the bearing by pressing its outer race • Oil seals parallel. • Bearings ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼ a. Clean the outside of the front wheel hub. b. Remove the oil seals “1” with a flat-head screwdriver.
FRONT WHEEL 3. Install: 2. Install: • Collar “1” • Front wheel axle “1” Apply the lithium-soap-based grease on the oil Apply the lithium-soap-based grease to the seal lip. front wheel axle. 4. Install: 3. Tighten: • Speed sensor “1” •...
REAR WHEEL REAR WHEEL EAS2GB7160 Removing the rear wheel 14 Nm (1.4 m kgf, 10 ft Ibf) 125 Nm (12.5 m kgf, 90 ft lbf) 21 Nm (2.1 m kgf, 15 ft Ibf) 50 Nm (5.0 m kgf, 36 ft Ibf) 21 Nm (2.1 m kgf, 15 ft Ibf) Order Part name...
REAR WHEEL 4. Measure: REMOVING THE REAR WHEEL EAS2GB7161 • Radial wheel runout 1. Use a suitable stand to raise the rear wheel • Lateral wheel runout off the ground. Refer to “CHECKING THE FRONT WHEEL” WARNING on page 5-5. Securely support the vehicle so that there is Radial wheel runout limit no danger of it falling over.
FRONT BRAKE FRONT BRAKE EAS2GB7167 Removing the front brake caliper 30 Nm (3.0 m kgf, 22 ft lbf) 23 Nm (2.3 m kgf, 17 ft lbf) 6 Nm (0.6 m kgf, 4.3 ft lbf) 17 Nm (1.7 m kgf, 12 ft lbf) 2.5 Nm (0.25 m kgf, 1.8 ft...
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FRONT BRAKE Disassembling the front brake caliper 6 Nm (0.6 m kgf, 4.3 ft Ibf) Order Part name Q’ty Remarks Brake caliper piston Brake caliper piston dust seal Brake caliper piston seal Bleed screw For assembly, reverse the disassemble pro- cedure.
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FRONT BRAKE Removing the front brake master cylinder Order Part name Q’ty Remarks Drain. Brake fluid Refer to “BLEEDING THE BRAKE SYSTEM” on page 3-24. Brake lever Union bolt Copper washers Front brake hose Brake master cylinder reservoir cap Brake master cylinder reservoir diaphragm Front brake master cylinder float Front brake master cylinder holder Front brake master cylinder...
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FRONT BRAKE Disassembling the front brake master cylinder Order Part name Q’ty Remarks Dust boot Circlip Washer Brake master cylinder kit For assembly, reverse the disassemble pro- cedure. 5-16...
FRONT BRAKE INTRODUCTION EAS2GB7168 Brake disc thickness limit WARNING 2.5 mm (0.10 in) If you need to disassemble the disc brake 4. Install: components, observe the following precau- • Front wheel tions. Refer to “FRONT WHEEL” on page 5-4. • Never disassemble the brake components unless absolutely necessary.
FRONT BRAKE ASSEMBLING THE FRONT BRAKE CALI- EAS2GB7173 WARNING • Before installation, clean and lubricate the internal parts. Use new brake fluid for cleaning and lubricating. • Never use solvents on internal brake com- ponents as they will cause the piston seals to swell and distort.
FRONT BRAKE 3. Install: 2. Install: • Brake caliper piston “1” • Front brake caliper • Brake pad spring • Brake pad Apply the brake fluid on the piston outer sur- • Brake pad pin face. • Brake hose holder NOTICE Brake pad pin •...
FRONT BRAKE NOTICE Brake fluid may damage painted surfaces and plastic parts. Therefore, always clean up any spilt brake fluid immediately. 5. Bleed: • Brake system Refer to “BLEEDING THE BRAKE SYS- TEM” on page 3-24. 6. Check: • Brake fluid level 2.
FRONT BRAKE INSTALLING THE FRONT BRAKE MASTER EAS2GB7179 CYLINDER 1. Install: • Brake master cylinder “1” Brake master cylinder holder bolt 9 Nm (0.9 m·kgf, 6.5 ft·lbf) • Install the front brake master cylinder holder 3. Install: with the “UP” mark facing up. •...
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FRONT BRAKE Turn the handlebar toward right and left to make sure that the brake hose does not touch other parts (e.g., wire harness, cables, leads). Adjust if necessary. 6. Check: • Brake lever free play Refer to “ADJUSTING THE FRONT BRAKE”...
REAR BRAKE REAR BRAKE EAS2GB7180 Removing the rear brake caliper 10 Nm (1.0 m kgf, 7.2 ft Ibf) 2.5 Nm (0.25 m kgf, 1.8 ft Ibf) • • • • 17 Nm (1.7 m kgf, 12 ft Ibf) • • 30 Nm (3.0 m kgf, 22 ft Ibf)
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REAR BRAKE Disassembling the rear brake caliper 6 Nm (0.6 m kgf, 4.3 ft Ibf) Order Part name Q’ty Remarks Brake caliper piston Brake caliper piston dust seal Brake caliper piston seal Bleed screw For assembly, reverse the disassemble pro- cedure.
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REAR BRAKE Removing the rear brake master cylinder Order Part name Q’ty Remarks Drain. Brake fluid Refer to “BLEEDING THE BRAKE SYSTEM” on page 3-24. Union bolt Copper washers Brake hose Split pin Washer Brake master cylinder reservoir cap Brake master cylinder reservoir diaphragm plate Brake master cylinder reservoir diaphragm Rear brake master cylinder For installation, reverse the removal proce-...
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REAR BRAKE Disassembling the rear brake master cylinder Order Part name Q’ty Remarks Dust boot Circlip Push rod Brake master cylinder kit For assembly, reverse the disassemble pro- cedure. 5-26...
REAR BRAKE INTRODUCTION EAS2GB7181 WARNING If you need to disassemble the disc brake components, observe the following precau- tions. • Never disassemble the brake components unless absolutely necessary. • If there is any problem with connections on the hydraulic brake system, perform the following jobs.
REAR BRAKE 1. Remove: WARNING • Union bolt • Use only the designated brake fluid. Other • Copper washers brake fluids may cause the rubber seals to • Brake hose deteriorate, causing leakage and poor brake performance. To drain any remaining brake fluid, place a con- •...
REAR BRAKE Specified brake fluid DOT 4 1. Wash the brake master cylinder and the brake master cylinder kit with brake fluid. 2. Install: • Primary cylinder cup “1” • Secondary cylinder cup “2” Install to the brake master cylinder piston “3”.
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REAR BRAKE 2. Pour brake fluid to the brake fluid reservoir 5. Check: up to the specified level. • Brake pedal operation A softy or spongy feeling Bleed the brake Specified brake fluid system. DOT 4 Refer to “BLEEDING THE BRAKE SYS- TEM”...
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HANDLEBAR HANDLEBAR EAS2GB7193 Removing the handlebar Order Part name Q’ty Remarks Clutch cable Disconnect. Clutch switch Clutch lever holder Engine stop switch Brake master cylinder Throttle cable cap Throttle cable (pull) Disconnect. Throttle cable (return) Disconnect. Right grip Tube guide Start switch Left grip Handlebar upper holder...
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HANDLEBAR Removing the handlebar Order Part name Q’ty Remarks Handlebar lower holder Damper For installation, reverse the removal proce- dure. 5-34...
HANDLEBAR REMOVING THE HANDLEBAR EAS2GB7194 1. Stand the vehicle on a level surface. WARNING Securely support the vehicle so that there is no danger of it falling over. 2. Remove: • Clutch switch “1” CHECKING THE HANDLEBAR EAS2GB7195 1. Check: •...
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HANDLEBAR NOTICE • First, tighten the bolts on the front side of the upper handlebar holder, and then on the rear side. • Turn the handlebar all the way to the left and right. If there is any contact with the fuel tank, adjust the handlebar position.
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HANDLEBAR WARNING • Install the brake master cylinder holder with After tightening the throttle cable housing the “UP” mark facing up. screws, check that the throttle grip “3” • Install in order for the top of the front brake moves smoothly. If it does not, retighten the master cylinder assembly to be level.
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HANDLEBAR 14.Adjust: • Throttle grip free play Refer to “ADJUSTING THE THROTTLE GRIP FREE PLAY” on page 3-13. Throttle grip free play 3.0–5.0 mm (0.12–0.20 in) 5-39...
FRONT FORK FRONT FORK EAS2GB7197 Removing the front fork legs Order Part name Q’ty Remarks Use a suitable stand to raise the front wheel off the ground. Front wheel Refer to “FRONT WHEEL” on page 5-4. Front brake caliper Refer to “FRONT BRAKE” on page 5-13. Brake hose holder Protector Upper bracket pinch bolts...
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FRONT FORK Disassembling the front fork leg 30 Nm (3.0 m kgf, 22 ft Ibf) • • 29 Nm (2.9 m kgf, 21 ft Ibf) • • 28 Nm (2.8 m kgf, 20 ft Ibf) • • 55 Nm (5.5 m kgf, 40 ft Ibf) •...
FRONT FORK REMOVING THE FRONT FORK LEGS EAS2GB7198 1. Use a suitable stand to raise the front wheel • While compressing the inner tube “2”, set the off the ground. cap bolt ring wrench “4” between the inner tube and locknut “3”. WARNING •...
FRONT FORK The bending value is shown by one half of the dial gauge reading. WARNING Do not attempt to straighten a bent inner tube as this may dangerously weaken it. ▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲ 5. Remove: • Base valve “1” (from the damper assembly) Hold the damper assembly with the cap bolt ring wrench “2”...
FRONT FORK 5. Check: ASSEMBLING THE FRONT FORK LEGS EAS2GB7201 • Base valve “1” Wear/damage Replace. WARNING Contamination Clean. • Make sure the oil levels in both front fork • O-rings “2” legs are equal. Wear/damage Replace. •...
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FRONT FORK 4. Measure: 6. Loosen: • Oil level (left and right) “a” • Compression damping force adjuster “1” Out of specification Regulate. • Before loosening the damping force adjuster, Standard oil level record the setting position. 145–148 mm (5.71–5.83 in) •...
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FRONT FORK 9. Tighten: • Base valve “1” Base valve 28 Nm (2.8 m·kgf, 20 ft·lbf) Hold the damper assembly with the cap bolt ring wrench “2” and use the cap bolt wrench “3” to tighten the base valve. 12.Allow the overflowing oil to escape at the Cap bolt wrench hole “a”...
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FRONT FORK • Apply the lithium-soap-based grease on the dust seal lip and oil seal lip. • Apply the fork oil on the inner tube. • When installing the oil seal, use vinyl seat “a” with fork oil applied to protect the oil seal lip. 17.Install: •...
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FRONT FORK 19.Install: 22.Measure: • Oil seal clip “1” • Distance “a” Out of specification Turn into the locknut. Fit the oil seal clip correctly in the groove in the Distance “a” outer tube. 16 mm (0.63 in) or more Between the damper assembly “1”...
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FRONT FORK 24.Install: Cap bolt ring wrench • Damper assembly “1” 90890-01501 (to the inner tube “2”) Cap bolt ring wrench YM-01501 NOTICE Allow the damper assembly to slide slowly down the inner tube until it contacts the bot- tom of the inner tube. Be careful not to dam- age the inner tube.
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FRONT FORK 6. Install: 9. Adjust: • Speed sensor lead “1” • Compression damping force • Plate 2 “2” (to the right front fork protector) Turn in the damping adjuster “1” finger-tight and then turn out to the originally set position. Plate 2 screw 0.5 Nm (0.05 m·kgf, 0.36 ft·lbf) Install the plate 2 in the direction as shown.
STEERING HEAD STEERING HEAD EAS2GB7203 Removing the lower bracket 145 Nm (14.5 m kgf, 105 ft lbf) 21 Nm (2.1 m kgf, 15 ft lbf) 7 Nm (0.7 m kgf, 5.1 ft lbf) 7 Nm (0.7 m kgf, 5.1 ft lbf) 21 Nm (2.1 m kgf, 15 ft...
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STEERING HEAD Removing the lower bracket 145 Nm (14.5 m kgf, 105 ft lbf) 21 Nm (2.1 m kgf, 15 ft lbf) 7 Nm (0.7 m kgf, 5.1 ft lbf) 7 Nm (0.7 m kgf, 5.1 ft lbf) 21 Nm (2.1 m kgf, 15 ft lbf) 3.8 Nm (0.38 m...
STEERING HEAD REMOVING THE LOWER BRACKET EAS2GB7204 1. Use a suitable stand to raise the front wheel Always replace the bearing and the bearing off the ground. race as a set. WARNING Securely support the vehicle so that there is no danger of it falling over.
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STEERING HEAD 5. Check the steering stem by turning this lock to lock. If there is any binding, remove the Apply the lithium-soap-based grease on the steering stem and check the steering bear- bearing and bearing race cover lip. ing. 3.
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STEERING HEAD Apply the lithium-soap-based grease to the contact surface of the steering stem nut when installing. 12.Install: • Speed sensor lead holder “1” • Speed sensor lead clamp “2” Speed sensor lead holder bolt 13 Nm (1.3 m·kgf, 9.4 ft·lbf) 9.
REAR SHOCK ABSORBER ASSEMBLY REAR SHOCK ABSORBER ASSEMBLY EAS2GB7207 Removing the rear shock absorber assembly 16 15 14 13 Order Part name Q’ty Remarks Seat Refer to “GENERAL CHASSIS” on page 5-1. Side cover (left / right) Refer to “GENERAL CHASSIS” on page 5-1. Air scoop (left / right) Refer to “GENERAL CHASSIS”...
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REAR SHOCK ABSORBER ASSEMBLY Removing the rear shock absorber assembly 16 15 14 13 Order Part name Q’ty Remarks O-ring Dust seal Stopper ring Bearing For installation, reverse the removal proce- dure. 5-59...
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REAR SHOCK ABSORBER ASSEMBLY Disassembling the relay arm 80 Nm (8.0 m kgf, 58 ft lbf) Order Part name Q’ty Remarks Relay arm Connecting arm Collars Oil seals Washers Bearing For assembly, reverse the disassemble pro- cedure. 5-60...
• To dispose of a damaged or a worn-out rear shock absorber, take the unit to your Yamaha dealer for this disposal proce- 3. Remove: dure. • Rear shock absorber assembly upper bolt •...
SWINGARM SWINGARM EAS2GB7216 Removing the swingarm 70 Nm (7.0 m kgf, 51 ft lbf) 4.0 Nm (0.40 m kgf, 2.9 ft lbf) Order Part name Q’ty Remarks Use a suitable stand to raise the front wheel off the ground. Brake hose holder Refer to “REAR BRAKE”...
SWINGARM REMOVING THE SWINGARM EAS2GB7217 1. Use a suitable stand to raise the rear wheel off the ground. WARNING Securely support the vehicle so that there is no danger of it falling over. 2. Measure: • Swingarm side play • Swingarm vertical movement ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼...
CHAIN DRIVE CHAIN DRIVE EAS2GB7221 Removing the drive chain 75 Nm (7.5 m kgf, 54 ft lbf) 7 Nm (0.7 m kgf, 5.1 ft lbf) Job Order Part name Q’ty Servicing Information Drive sprocket Refer to “ENGINE REMOVAL” on page 6-1. Drive chain For installation, reverse the removal proce- dure.
CHAIN DRIVE REMOVING THE DRIVE CHAIN EAS23420 1. Stand the vehicle on a level surface. WARNING Securely support the vehicle so that there is no danger of it falling over. Place the vehicle on a suitable stand so that the rear wheel is elevated.
CHAIN DRIVE b. Correct 1. Drive chain roller 2. Drive sprocket CHECKING THE REAR WHEEL SPROCKET EAS2GB7223 Refer to “CHECKING AND REPLACING THE REAR WHEEL SPROCKET” on page 5-10. EAS2GB7224 INSTALLING THE DRIVE CHAIN 1. Install: • Drive chain ▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲ NOTICE 4.
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CHAIN DRIVE NOTICE A drive chain that is too tight will overload the engine and other vital parts, and one that is too loose can skip and damage the swingarm or cause an accident. Therefore, keep the drive chain slack within the speci- fied limits.
ENGINE ENGINE REMOVAL ..................6-1 REMOVING THE SILENCER..............6-6 REMOVING THE EXHAUST PIPE 2............6-6 REMOVING THE DRIVE SPROCKET ............6-6 REMOVING THE ENGINE .................6-7 CLEANING THE SPARK ARRESTER ............6-7 CHECKING THE SILENCER AND EXHAUST PIPE........6-8 INSTALLING THE ENGINE................6-8 INSTALLING THE BRAKE PEDAL ............6-9 INSTALLING THE DRIVE SPROCKET............6-9 INSTALLING THE EXHAUST PIPE AND MUFFLER.........6-9 CAMSHAFT ....................6-11...
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CLUTCH ......................6-40 REMOVING THE CLUTCH ..............6-43 CHECKING THE FRICTION PLATES............6-43 CHECKING THE CLUTCH PLATES ............6-43 CHECKING THE CLUTCH SPRINGS............6-43 CHECKING THE CLUTCH HOUSING .............6-44 CHECKING THE CLUTCH BOSS............6-44 CHECKING THE PRESSURE PLATE .............6-44 CHECKING THE PUSH LEVER SHAFT..........6-44 CHECKING THE CLUTCH PUSH RODS ..........6-44 CHECKING THE PRIMARY DRIVE GEAR..........6-44 CHECKING THE PRIMARY DRIVEN GEAR ...........6-45 INSTALLING THE OIL SEAL ..............6-45...
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GENERATOR AND STARTER CLUTCH............6-62 REMOVING THE GENERATOR ..............6-64 CHECKING THE STARTER CLUTCH .............6-64 INSTALLING THE STARTER CLUTCH ...........6-65 INSTALLING THE GENERATOR.............6-65 CRANKCASE ....................6-68 DISASSEMBLING THE CRANKCASE.............6-71 REMOVING THE CRANKCASE BEARING ..........6-71 CHECKING THE TIMING CHAIN, TIMING CHAIN GUIDE, OIL STRAINER..................6-71 CHECKING THE CRANKCASE ...............6-71 INSTALLING THE OIL SEAL ..............6-72 ASSEMBLING THE CRANKCASE............6-72...
This section is intended for those who have basic knowledge and skill concerning the servicing of Yamaha motorcycles (e.g., Yamaha dealers, service engineers, etc.). Those who have little knowl- edge and skill concerning servicing are requested not to undertake inspection, adjustment, disas- sembly, or reassembly only by reference to this manual.
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ENGINE REMOVAL Removing the exhaust pipe 5 Nm (0.5 m kgf, 3.6 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) 9 Nm (0.9 m kgf, 6.5 ft Ibf) 13 Nm (1.3 m , 9.4 ft lbf) 20 Nm (2.0 m kgf, 14 ft lbf) 30 Nm (3.0 m kgf, 22 ft Ibf)
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ENGINE REMOVAL Removing the electronic parts Order Part name Q’ty Remarks Use a suitable stand to raise the front wheel off the ground. Seat Refer to “GENERAL CHASSIS” on page 5-1. Side cover (left/right) Refer to “GENERAL CHASSIS” on page 5-1. Air scoop (left / right) Refer to “GENERAL CHASSIS”...
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ENGINE REMOVAL Removing the engine 55 Nm (5.5 m kgf, 40 ft Ibf) Order Part name Q’ty Remarks Use a suitable stand to raise the front wheel off the ground. Seat Refer to “GENERAL CHASSIS” on page 5-1. Side cover (left/right) Refer to “GENERAL CHASSIS”...
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ENGINE REMOVAL Removing the engine 55 Nm (5.5 m kgf, 40 ft Ibf) Order Part name Q’ty Remarks Drive sprocket cover Drive chain guide Drive sprocket Upper engine bracket Washer Thickness:2.3 mm (0.09 in) Washer Thickness:1.0 mm (0.04 in) Lower engine bracket Pivot shaft Engine For installation, reverse the removal proce-...
ENGINE REMOVAL REMOVING THE SILENCER EAS2GB7227 1. Remove: • Rear shock absorber assembly lower bolt “1” • Connecting arm bolt (frame side) “2” • Silencer “3” Move the rear shock absorber to the left side of the chassis, and remove the silencer. REMOVING THE DRIVE SPROCKET EAS2GB7229 1.
ENGINE REMOVAL REMOVING THE ENGINE CLEANING THE SPARK ARRESTER EAS2GB7230 EAS2GB7231 1. Remove: WARNING • Pivot shaft “1” • Be sure the exhaust pipe and muffler are cool before cleaning the spark arrester. If the pivot shaft is pulled all the way out, the •...
ENGINE REMOVAL INSTALLING THE BRAKE PEDAL EAS2GB7234 NOTICE 1. Install: Make sure to tighten to specification; other- • Spring “1” wise, it may damage the other part that is • Brake pedal “2” fastened together. • O-rings “3” • Bolt (brake pedal) “4” Bolt (brake pedal) 26 Nm (2.6 m·kgf, 19 ft·lbf) •...
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ENGINE REMOVAL 2. Install: • Clamp Install and temporarily tighten the silencer so • Exhaust pipe 2 “1” that its joint is positioned as shown with respect • Bolt (exhaust pipe 2) “2” to the exhaust pipe 2. 2mm (0.08in) 4.
CAMSHAFT CAMSHAFT EAS2GB7237 Removing the cylinder head cover 13 Nm (1.3 m kgf, 9.4 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) Order Part name Q’ty Remarks Seat Refer to “GENERAL CHASSIS” on page 5-1. Side cover (left/right) Refer to “GENERAL CHASSIS”...
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CAMSHAFT Removing the camshaft 10 Nm (1.0 m kgf, 7.2 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) 6 Nm (0.6 m kgf, 4.3 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) 6 Nm (0.6 m kgf, 4.3 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) Order Part name...
CAMSHAFT REMOVING THE CAMSHAFT EAS2GB7238 1. Remove: • Timing mark accessing screw “1” • Crankshaft end accessing screw “2” 4. Remove: • Bolt (camshaft cap) “1” • Camshaft cap “2” • Clip “3” 2. Align: • Alignment mark • Remove the bolts (camshaft cap) in a criss- cross pattern, working from the outside in.
CAMSHAFT 3. Measure: CHECKING THE CAMSHAFT EAS2GB7239 • Camshaft runout 1. Check: Out of specification Replace. • Camshaft lobes Blue discoloration/pitting/scratches Re- Camshaft runout limit 0.030 mm (0.0012 in) place the camshaft. 2. Measure: • Camshaft lobe dimensions “A” and “B” Out of specification ...
CAMSHAFT c. Install the dowel pins and the camshaft 2. Check: caps. • Camshaft sprocket More than 1/4 tooth wear “a” Replace the camshaft and the timing chain as a set. • Tighten the camshaft cap bolts in a crisscross pattern from innermost to outer caps.
CAMSHAFT CHECKING THE DECOMPRESSION SYS- EAS2GB7242 1. Check: • Decompression system ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼ a. Check that the decompressor cam “1” moves smoothly. b. Check that the decompressor lever pin “2” projects from the camshaft. c. Fit the timing chain “3” onto both camshaft sprockets and install the camshafts on the cylinder head.
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“2”, and the gasket “3”, and tighten inder head cover gasket. the bolt “4”. Bolt (timing chain tensioner) Yamaha bond No. 1215 10 Nm (1.0 m·kgf, 7.2 ft·lbf) 90890-85505 (Three bond No.1215®) c. Release the screwdriver, check that the ten- sioner rod comes out smoothly, and tighten 6.
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CYLINDER HEAD CYLINDER HEAD EAS2GB7244 Removing the cylinder head 33 Nm (3.3 m kgf, 24 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) Order Part name Q’ty Remarks Seat Refer to “GENERAL CHASSIS” on page 5-1. Side cover (left/right) Refer to “GENERAL CHASSIS”...
CYLINDER HEAD Removing the cylinder head 33 Nm (3.3 m kgf, 24 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) Order Part name Q’ty Remarks For installation, reverse the removal proce- dure.
CYLINDER HEAD REMOVING THE CYLINDER HEAD EAS2GB7245 1. Remove: • Intake camshaft • Exhaust camshaft Refer to “REMOVING THE CAMSHAFT” on page 6-13. 2. Remove: • Cylinder head nuts • Cylinder head bolts 2. Check: • Loosen the bolts in the proper sequence as •...
CYLINDER HEAD INSTALLING THE CYLINDER HEAD EAS2GB7248 1. Install: Tighten the bolts and nuts to the specified • Timing chain guide (intake side) “1” torque in two or three steps in the proper tight- • Dowel pin “2” ening sequence as shown. •...
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VALVES AND VALVE SPRINGS VALVES AND VALVE SPRINGS EAS2GB7249 Removing the valves and valve springs Order Part name Q’ty Remarks Refer to “CYLINDER HEAD” on page 6-18. Cylinder head Valve lifter Adjusting pad Valve cotter Valve spring retainer Valve spring Valve stem seal Valve spring seat Intake valve...
VALVES AND VALVE SPRINGS REMOVING THE VALVES EAS2GB7250 ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼ a. Pour a clean solvent “a” into the intake and exhaust ports. Before removing the internal parts of the cylin- b. Check that the valves are properly sealed. der head (e.g., valves, valve springs, valve seats), make sure that the valves are properly Check that there are no kerosene leaks from sealed.
VALVES AND VALVE SPRINGS 4. Remove: • Valve spring retainer “1” • Valve spring “2” • Valve “3” • Valve stem seat “4” • Valve spring seat “5” Identify the position of each part very carefully so that it can be reinstalled in its original place. 2.
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VALVES AND VALVE SPRINGS c. After installing the valve guide, expand the 4. Check: hole in the valve guide with the valve guide • Valve face Pitting/wear Grind the valve face. reamer “3” to obtain the proper valve-stem- to-valve-guide clearance. •...
VALVES AND VALVE SPRINGS While turning the valve lapper, tap and lap the valve seat. e. Apply a fine lapping compound to the valve face, and repeat the above steps. f. After every lapping step, be sure to clean off all of the lapping compound from the valve face and the valve seat.
VALVES AND VALVE SPRINGS 3. Install: CHECKING THE VALVE LIFTERS EAS2GB7254 • Spring seat “1” 1. Check: • Valve stem seal “2” • Valve lifter • Valve “3” Damage/scratches Replace the valve lift- • Valve spring “4” ers and cylinder head. •...
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VALVES AND VALVE SPRINGS 5. To fasten the valve cotters onto the valve stem, lightly tap the valve tip with a soft-face hammer. NOTICE Hitting the valve tip with excessive force could damage the valve. 6. Lubricate: • Adjusting pad “1” •...
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CYLINDER AND PISTON CYLINDER AND PISTON EAS2GB7256 Removing the cylinder and piston 10 Nm (1.0 m kgf, 7.2 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) Order Part name Q’ty Remarks Refer to “CYLINDER HEAD” on page 6-18. Cylinder head Cylinder body Gaskets...
CYLINDER AND PISTON REMOVING THE PISTON EAS2GB7257 1. Remove: • Piston pin clip “1” • Piston pin “2” • Piston “3” NOTICE Do not use a hammer to drive the piston pin out. • Before removing the piston pin clip, cover the CHECKING THE CYLINDER AND PISTON EAS2GB7258 crankcase opening with a cloth to prevent the...
CYLINDER AND PISTON CHECKING THE PISTON RINGS 1. Measure: • Piston ring side clearance Out of specification Replace the piston and piston rings as a set. Before measuring the piston ring side clear- ance, eliminate any carbon deposits from the piston ring grooves and piston rings.
CYLINDER AND PISTON Piston ring Top ring End gap (installed) 0.15–0.25 mm (0.0059–0.0098 in) Limit 0.50 mm (0.0197 in) Oil ring End gap (installed) 0.10–0.35 mm (0.0039–0.0138 in) EAS2GB7260 CHECKING THE PISTON PIN INSTALLING THE PISTON AND CYLINDER EAS2GB7261 1. Check: 1.
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CYLINDER AND PISTON 5. Install: • Cylinder gasket • Apply the engine oil to the piston pin. • Dowel pin • Install the piston with the F mark “a” on it • Cylinder pointing to its intake (front) side. • Before installing the piston pin clip, cover the Cylinder bolt crankcase opening with a cloth to prevent the 10 Nm (1.0 m·kgf, 7.2 ft·lbf)
ELECTRIC STARTER ELECTRIC STARTER EAS2GB7262 Removing the starter motor 12 Nm (1.2 m kgf, 8.7 ft Ibf) Order Job/Parts to remove Q’ty Remarks Exhaust pipe Refer to “ENGINE REMOVAL” on page 6-1. Starter motor For assembly, reverse the disassemble pro- cedure.
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ELECTRIC STARTER Disassembling the starter motor Order Job/Parts to remove Q’ty Remarks Starter motor front cover Starter motor yoke Armature assembly Starter motor rear cover Brush set For assembly, reverse the disassembly pro- cedure. 6-36...
ELECTRIC STARTER CHECKING THE STARTER MOTOR EAS2GB7263 ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼ a. Measure the armature assembly resistanc- 1. Check: es with the pocket tester. • Commutator Dirt Clean with 600 grit sandpaper. Pocket tester 2. Measure: 90890-03112 • Commutator diameter “a” Analog pocket tester Out of specification ...
ELECTRIC STARTER 7. Check: • Gear teeth Align the match mark “a” on the starter motor Damage/wear Replace the starter motor. yoke with the match mark “b” on the starter mo- 8. Check: tor rear cover. • Oil seal Damage/wear ...
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ELECTRIC STARTER 5. Install: • Bolt “1” • O-ring “2” Apply the lithium-soap-based grease on the O- ring. 6-39...
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CLUTCH CLUTCH EAS2GB7265 Removing the clutch 6 10 Order Part name Q’ty Remarks Drain. Engine oil Refer to “CHANGING THE ENGINE OIL” on page 3-17. Brake pedal Refer to “ENGINE REMOVAL” on page 6-1. Clutch cable Disconnect. Clutch cover Gasket Clutch spring Pressure plate Push rod 1...
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CLUTCH Removing the clutch 6 10 Order Part name Q’ty Remarks Cushion spring Friction plate 2 Identification color (purple) Clutch boss Thrust washer Primary driven gear Spacer Bearing Washer Push lever shaft For installation, reverse the removal proce- dure. 6-41...
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CLUTCH Removing the right crankcase cover Order Part name Q’ty Remarks Engine guard Refer to “ENGINE REMOVAL” on page 6-1. Drain. Engine oil Refer to “CHANGING THE ENGINE OIL” on page 3-17. Drain. Coolant Refer to “CHANGING THE COOLANT” on page 3-10.
CLUTCH CHECKING THE CLUTCH HOUSING EAS2GB7270 1. Check: • Clutch housing dogs “a” Damage/pitting/wear Deburr the clutch housing dogs or replace the clutch housing. Pitting on the clutch housing dogs will cause er- ratic clutch operation. CHECKING THE CLUTCH PUSH RODS EAS2GB7274 1.
CLUTCH • Right crankcase cover bolt “2” CHECKING THE PRIMARY DRIVEN GEAR EAS2GB7276 1. Check: Right crankcase cover bolt • Primary driven gear 10 Nm (1.0 m·kgf, 7.2 ft·lbf) Damage/wear Replace the primary drive and primary driven gears as a set. Excessive noise during operation ...
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CLUTCH 2. Install: 4. Bend the lock washer “1” tab. • Washer “1” • Bearing “2” • Collar “3” • Primary driven gear “4” • Thrust washer “5” • Clutch boss “6” Apply the engine oil on the primary driven gear inner circumference.
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CLUTCH 6. Install: 9. Install: • Bearing “1” • Clutch spring • Washer “2” • Clutch spring bolt • Circlip “3” Clutch spring bolt To push rod 1 “4”. 10 Nm (1.0 m·kgf, 7.2 ft·lbf) Apply the engine oil on the bearing and washer. Tighten the bolts in stages and in a crisscross pattern.
CLUTCH INSTALLING THE KICKSTARTER LEVER EAS2GB7280 1. Install: • Kickstarter lever “1” • Washer • Bolt (kickstarter lever) Bolt (kickstarter lever) 33 Nm (3.3 m·kgf, 24 ft·lbf) LOCTITE® Install so that there is a clearance “a” of 5 mm (0.2 in) or more between the kickstarter lever and the frame and that the kickstarter lever does not contact the right crankcase cover when it is pulled.
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KICKSTATER KICKSTATER EAS2GB7281 Removing the kick shaft Order Part name Q’ty Remarks Primary driven gear Refer to “CLUTCH” on page 6-40. Kick idle gear Kick shaft assembly Spring guide Torsion spring Ratchet wheel Kick gear Kick shaft For installation, reverse the removal proce- dure.
KICKSTATER 5. Install: • Torsion spring “1” Turn the torsion spring clockwise and hook into the proper hole “a” in the crankcase. 3. Install: • Spring guide “1” Slide the spring guide into the kick shaft, make sure the groove “a” in the spring guide fits on the stopper of the torsion spring.
SHIFT SHAFT SHIFT SHAFT EAS2GB7287 Removing the shift shaft and stopper lever 10 Nm (1.0 m kgf, 7.2 ft Ibf) 12 Nm (1.2 m kgf, 8.7 ft Ibf) 30 Nm (3.0 m kgf, 22 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) Order Part name Q’ty...
SHIFT SHAFT REMOVING THE SHIFT GUIDE AND SHIFT EAS2GB7288 LEVER ASSEMBLY 1. Remove: • Bolt (shift guide) • Shift guide “1” • Shift lever assembly “2” Make sure that the shift lever assembly is re- moved together with the shift guide. CHECKING THE SHIFT GUIDE AND SHIFT EAS2GB7291 LEVER ASSEMBLY...
SHIFT SHAFT INSTALLING THE STOPPER LEVER INSTALLING THE SHIFT GUIDE AND SHIFT EAS2GB7293 EAS2GB7295 1. Install: LEVER ASSEMBLY • Torsion spring “1” 1. Install: • Collar “2” • Spring “1” • Stopper lever “3” • Pawl pin “2” • Bolt (stopper lever) “4” •...
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OIL PUMP AND BALANCER GEAR OIL PUMP AND BALANCER GEAR EAS2GB7298 Removing the oil pump 2.0 Nm (0.20 m kgf, 1.4 ft Ibf) • • 5 Nm (0.5 m kgf, 3.6 ft Ibf) • • Order Part name Q’ty Remarks Primary driven gear Refer to “CLUTCH”...
OIL PUMP AND BALANCER GEAR Removing the balancer 75 Nm (7.5 m kgf, 54 ft lbf) 50 Nm (5.0 m kgf, 36 ft Ibf) Order Part name Q’ty Remarks Primary driven gear Refer to “CLUTCH” on page 6-40. Right crankcase cover Refer to “CLUTCH”...
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GENERATOR AND STARTER CLUTCH GENERATOR AND STARTER CLUTCH EAS2GB7305 Removing the generator Order Job/Parts to remove Q’ty Remarks Refer to “CHANGING THE ENGINE OIL” on Drain the engine oil. page 3-17. Refer to “GENERAL CHASSIS” on page 5-1 Seat and fuel tank and “FUEL TANK”...
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GENERATOR AND STARTER CLUTCH Removing the generator Order Job/Parts to remove Q’ty Remarks Woodruff key Starter clutch Starter clutch drive gear Crankshaft position sensor Stator For installation, reverse the removal proce- dure. 6-63...
“7” under the holder as shown. • Tighten the stator bolt using the T25 bit. • Apply the sealant to the grommet of the AC magneto lead. Yamaha bond No. 1215 Starter clutch bolt 90890-85505 16 Nm (1.6 m·kgf, 12 ft·lbf) (Three bond No.1215®) LOCTITE®...
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GENERATOR AND STARTER CLUTCH 2. Install: • Washer • Pass the AC magneto lead “4” under the left • Generator rotor nut “1” crankcase cover “a” as shown. • Tighten the bolts in stage, using a crisscross Generator rotor nut pattern.
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GENERATOR AND STARTER CLUTCH Install the cover (damper assembly) with its mark “a” facing upward. 6-67...
CRANKCASE CRANKCASE EAS2GB7310 Separating the crankcase 12 Nm (1.2 m kgf, 8.7 ft Ibf) • • 12 Nm (1.2 m kgf, 8.7 ft Ibf) • • 12 Nm (1.2 m kgf, 8.7 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) •...
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CRANKCASE Separating the crankcase 12 Nm (1.2 m kgf, 8.7 ft Ibf) • • 12 Nm (1.2 m kgf, 8.7 ft Ibf) • • 12 Nm (1.2 m kgf, 8.7 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) •...
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CRANKCASE Removing the bearing and oil seal 22 Nm (2.2 m kgf, 16 ft Ibf) • • Order Part name Q’ty Remarks Transmission Refer to “TRANSMISSION” on page 6-76. Shift cam and shift fork Refer to “TRANSMISSION” on page 6-76. Circlip Oil seals Bearing...
CRANKCASE DISASSEMBLING THE CRANKCASE EAS2GB7311 1. Separate: • Right crankcase • Left crankcase ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼ a. Remove the crankcase bolts. c. Remove the dowel pins and O-ring. ▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲ REMOVING THE CRANKCASE BEARING EAS2GB7312 1. Remove: • Bearing “1” • Remove the bearing from the crankcase by Loosen each bolt 1/4 of a turn at a time and af- pressing its inner race.
Install the bearing by pressing its outer race parallel. 2. Apply: • Sealant (to the crankcase mating surface) Yamaha bond No. 1215 90890-85505 (Three bond No.1215®) 3. 45 mm (1.77 in) 4. 60 mm (2.36 in) 5. 75 mm (2.95 in) a.
CRANKSHAFT ASSEMBLY AND BALANCER SHAFT CRANKSHAFT ASSEMBLY AND BALANCER SHAFT EAS2GB7317 Removing the crankshaft assembly and balancer shaft Order Part name Q’ty Remarks Separate. Crankcase Refer to “CRANKCASE” on page 6-68. Transmission Refer to “TRANSMISSION” on page 6-76. Balancer shaft Crankshaft assembly For installation, reverse the removal proce- dure.
CRANKSHAFT ASSEMBLY AND BALANCER SHAFT 2. Measure: REMOVING THE CRANKSHAFT ASSEMBLY EAS2GB7318 • Big end side clearance “a” 1. Remove: Out of specification Replace the big end • Crankshaft assembly “1” bearing, crankshaft pin, or connecting rod. Remove the crankshaft assembly by using the Big end side clearance 0.150–0.450 mm (0.0059–0.0177 crankcase separating tool “2”.
TRANSMISSION TRANSMISSION EAS2GB7322 Removing the transmission, shift drum assembly, and shift forks Order Part name Q’ty Remarks Engine Refer to “ENGINE REMOVAL” on page 6-1. Separate. Crankcase Refer to “CRANKCASE” on page 6-68. Main axle Drive axle Long shift fork guide bar Short shift fork guide bar Spring Shift cam...
COOLING SYSTEM RADIATOR .......................7-1 HANDLING NOTE ..................7-3 CHECKING THE RADIATOR..............7-3 WATER PUMP....................7-4 REMOVING THE OIL SEAL...............7-6 CHECKING THE WATER PUMP ...............7-6 CHECKING THE BEARING ...............7-6 INSTALLING THE OIL SEAL ..............7-6 ASSEMBLING THE WATER PUMP............7-6...
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This section is intended for those who have basic knowledge and skill concerning the servicing of Yamaha motorcycles (e.g., Yamaha dealers, service engineers, etc.). Those who have little knowl- edge and skill concerning servicing are requested not to undertake inspection, adjustment, disas- sembly, or reassembly only by reference to this manual.
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RADIATOR Removing the radiator 8 Nm (0.8 m kgf, 5.8 ft Ibf) Order Part name Q’ty Remarks Right radiator Radiator hose 2 Radiator hose 3 Radiator hose 4 Radiator pipe 2 Radiator breather hose Left radiator Radiator hose 1 Radiator pipe 1 Coolant temperature sensor For installation, reverse the removal proce- dure.
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RADIATOR HANDLING NOTE EAS2GB7330 WARNING If coolant seems hot, do not remove the ra- diator cap. CHECKING THE RADIATOR EAS2GB7331 1. Check: • Radiator fins “1” Obstructions Clean. Apply compressed air to the rear of the radi- ator. Damage Repair or replace. Correct any flattened fins with a thin, flat-head screwdriver.
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WATER PUMP WATER PUMP EAS2GB7332 Removing the water pump 10 Nm (1.0 m kgf, 7.2 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) Order Part name Q’ty Remarks Drain. Coolant Refer to “CHANGING THE COOLANT” on page 3-10. Drain.
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WATER PUMP Removing the water pump 10 Nm (1.0 m kgf, 7.2 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) Order Part name Q’ty Remarks For installation, reverse the removal proce- dure.
WATER PUMP REMOVING THE OIL SEAL EAS2GB7333 • Remove the oil seal when the coolant level changes frequently more than usual, coolant has discolored, or engine oil has become milky. • Do not use the removed oil seal. 1. Remove: •...
FUEL SYSTEM FUEL TANK......................8-1 REMOVING THE FUEL TANK ..............8-3 REMOVING THE FUEL PUMP ..............8-3 CHECKING THE FUEL PUMP BODY............8-3 INSTALLING THE FUEL PUMP..............8-3 REMOVING THE FUEL SENDER..............8-4 CHECKING THE FUEL SENDER ..............8-4 INSTALLING THE FUEL SENDER ............8-4 INSTALLING THE FUEL TANK..............8-4 CHECKING THE FUEL PRESSURE ............8-5 CHECKING THE DAMPER ................8-5 CHECKING AND REPLACING THE PROTECTOR ........8-6...
This section is intended for those who have basic knowledge and skill concerning the servicing of Yamaha motorcycles (e.g., Yamaha dealers, service engineers, etc.). Those who have little knowl- edge and skill concerning servicing are requested not to undertake inspection, adjustment, disas- sembly, or reassembly only by reference to this manual.
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FUEL TANK Removing the fuel tank 7 Nm (0.7 m kgf, 5.1 ft Ibf) 9 Nm (0.9 m kgf, 6.5 ft Ibf) 7 Nm (0.7 m kgf, 5.1 ft Ibf) 4.0 Nm (0.40 m kgf, 2.9 ft Ibf) 4.0 Nm (0.40 m kgf, 2.9 ft Ibf) 7 Nm (0.7 m kgf, 5.1 ft Ibf) 4.0 Nm (0.40 m kgf, 2.9 ft Ibf) Order...
FUEL TANK REMOVING THE FUEL TANK EAS2GB7340 1. Extract the fuel in the fuel tank through the fuel tank cap with a pump. 2. Remove: • Fuel hose coupler WARNING Cover the fuel hose connection with a cloth when disconnecting it. This is because re- sidual pressure in the fuel hose could cause fuel to spurt out when the hose is removed.
FUEL TANK INSTALLING THE FUEL SENDER EAS2GB7346 1. Install: • Fuel sender gasket • Fuel sender Fuel sender bolts 4.0 Nm (0.40 m·kgf, 2.9 ft·lbf) • Do not damage the installation surfaces of the fuel tank when installing the fuel sender. REMOVING THE FUEL SENDER EAS2GB7344 •...
FUEL TANK WARNING • Insert the fuel hose into the fuel pipe securely Cover the fuel hose connection with a cloth until you hear a “click”. when disconnecting it. This is because re- • Slide the fuel hose connector cover “1” at the sidual pressure in the fuel hose could cause hose end in the direction of the arrow.
FUEL TANK 84 mm 115 mm (3.31 in) (4.53 in) 84 mm 115 mm (3.31 in) (4.53 in) CHECKING AND REPLACING THE PRO- EAS2GB7350 TECTOR 1. Check: • Protector “1” Wear/damage Replace. Affix the protector as shown. 0 mm (0 in) 15 mm (0.59 in)
THROTTLE BODY THROTTLE BODY EAS2GB7351 Removing the throttle body 7 Nm (0.7 m kgf, 5.1 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) 3.5 Nm (0.35 m kgf, 2.5 ft Ibf) 3.5 Nm (0.35 m kgf, 2.5 ft Ibf) 3.0 Nm (0.30 m kgf, 2.2 ft Ibf) Order Part name...
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THROTTLE BODY Removing the throttle body 7 Nm (0.7 m kgf, 5.1 ft Ibf) 10 Nm (1.0 m kgf, 7.2 ft Ibf) 3.5 Nm (0.35 m kgf, 2.5 ft Ibf) 3.5 Nm (0.35 m kgf, 2.5 ft Ibf) 3.0 Nm (0.30 m kgf, 2.2 ft Ibf) Order Part name Q’ty...
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THROTTLE BODY Removing the injector 3.4 Nm (0.34 m kgf, 2.5 ft lbf) 5 Nm (0.5 m kgf, 3.6 ft lbf) 3.4 Nm (0.34 m kgf, 2.5 ft lbf) Order Part name Q’ty Remarks Fuel inlet pipe Injector Gaskets Throttle position sensor Intake air pressure sensor For installation, reverse the removal proce- dure.
THROTTLE BODY CHECKING THE INJECTOR EAS2GB7352 1. Check: • Injectors Obstruction Replace, and check the fuel pump and the fuel injection system. Refer to “FUEL INJECTION SYSTEM” on page 9-28. Deposits Replace. Damage Replace. 2. Check: • Injector resistance Refer to “CHECKING THE FUEL INJEC- TOR”...
Check that the throttle grip is fully closed. d. Connect the throttle position sensor to the wire harness. e. Set the Yamaha diagnostic tool to “diagnos- tic mode”. f. Choose the diagnostic code No. “01”. g. Adjust the throttle position sensor mounted angle until “11”–“14”...
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ELECTRICAL COMPONENTS...............9-60 CHECKING THE SWITCHES ..............9-64 CHECKING THE BULBS AND BULB SOCKETS ........9-67 CHECKING THE FUSES .................9-68 CHECKING AND CHARGING THE BATTERY........9-69 CHECKING THE RELAYS ...............9-72 CHECKING THE DIODE ................9-73 CHECKING THE IGNITION SPARK GAP..........9-73 CHECKING THE SPARK PLUG CAP ............9-73 CHECKING THE IGNITION COIL ............9-74 CHECKING THE CRANKSHAFT POSITION SENSOR......9-74 CHECKING THE LEAN ANGLE SENSOR..........9-75...
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This section is intended for those who have basic knowledge and skill concerning the servicing of Yamaha motorcycles (e.g., Yamaha dealers, service engineers, etc.). Those who have little knowl- edge and skill concerning servicing are requested not to undertake inspection, adjustment, disas- sembly, or reassembly only by reference to this manual.
IGNITION SYSTEM TROUBLESHOOTING EAS2GB7359 The ignition system fails to operate (no spark or intermittent spark). Before troubleshooting, remove the following part (s): 1. Seat 2. Side cover (left/right) 3. Air scoop (left/right) 4. Fuel tank 5. Fuel tank NG 1.
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IGNITION SYSTEM NG 8. Check the lean angle sensor. Replace the lean angle sensor. Refer to “CHECKING THE LEAN ANGLE SENSOR” on page 9-75. OK NG 9. Check the entire ignition system’s Properly connect or repair the ignition sys- wiring.
ELECTRIC STARTING SYSTEM STARTING CIRCUIT CUT-OFF SYSTEM OPERATION EAS2GB7361 If the meter light comes on, the starter motor can only operate if at least one of the following condi- tions is met: • The transmission is in neutral (the neutral switch is closed). •...
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ELECTRIC STARTING SYSTEM a. WHEN THE TRANSMISSION IS IN NEU- TRAL b. WHEN THE CLUTCH LEVER IS PULLED TO THE HANDLEBAR 1. Battery 2. Main fuse 3. Main relay 4. Starting circuit cut-off relay 5. Start switch 6. Diode 7. Clutch switch 8.
ELECTRIC STARTING SYSTEM TROUBLESHOOTING EAS2GB7362 The starter motor fails to turn. Before troubleshooting, remove the following part (s): 1. Seat 2. Side cover (left/right) 3. Air scoop (left/right) 4. Fuel tank 5. Fuel tank NG 1. Check the fuse. Replace the fuse(s).
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ELECTRIC STARTING SYSTEM NG 8. Check the main relay. Replace the main relay. Refer to “CHECKING THE RE- LAYS” on page 9-72. OK NG 9. Check the neutral switch. Replace the neutral switch. Refer to “CHECKING THE SWITCHES”...
CHARGING SYSTEM TROUBLESHOOTING EAS2GB7364 The battery is not being charged. Before troubleshooting, remove the following part (s): 1. Seat 2. Side cover (left/right) 1. Check the fuse. NG Refer to “CHECKING THE FUSES” Replace the fuse(s). on page 9-68. OK NG ...
LIGHTING SYSTEM TROUBLESHOOTING EAS2GB7366 Any of the following fail to light: headlight or meter light. Before troubleshooting, remove the following part (s): 1. Seat 2. Side cover (left) 3. Air scoop (left/right) 4. Fuel tank NG 1. Check the each bulbs condition. Refer to “CHECKING THE BULBS Replace the bulb (s).
SIGNALING SYSTEM TROUBLESHOOTING EAS2GB7368 • The speedometer does not operate normally. • The fuel indicator light does not come on. Before troubleshooting, remove the following part (s): 1. Seat 2. Side cover (left/right) 3. Air scoop (left/right) 4. Fuel tank NG ...
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SIGNALING SYSTEM The fuel level warning light fails to come on. NG 1. Check the fuel sender. Replace the fuel sender assembly. Refer to “CHECKING THE FUEL SENDER” on page 9-77. OK NG 2. Check the resistor. Replace the resistor.
COOLING SYSTEM COOLING SYSTEM EAS2GB7369 EAS2GB7370 CIRCUIT DIAGRAM 9-24...
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COOLING SYSTEM 1. Joint connector 2. Joint connector 3. Joint connector 7. Main relay 9. Battery 10.Frame ground 11.Starter relay 12.Main fuse 22.ECU (engine control unit) 27.Radiator fan motor relay 28.Radiator fan motor fuse 29.Radiator fan motor 30.Joint connector 32.Coolant temperature sensor 48.Frame ground 9-25...
COOLING SYSTEM TROUBLESHOOTING EAS2GB7371 The radiator fan motor fails to turn. Before troubleshooting, remove the following part(s): 1. Seat 2. Side cover (left) 3. Air scoop (left/right) 4. Fuel tank NG 1. Check the fuse. Replace the fuse(s). Refer to “CHECKING THE FUSES” on page 9-68.
FUEL INJECTION SYSTEM ECU SELF-DIAGNOSTIC FUNCTION EAS2GB7374 The ECU is equipped with a self-diagnostic function in order to ensure that the fuel injection system is operating normally. If this function detects a malfunction in the system, it immediately operates the engine under substitute characteristics and illuminates the engine trouble warning light to alert the rider that a malfunction has occurred in the system.
• Fault code number ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼ a. Connect the Yamaha diagnostic tool. Refer to “YAMAHA DIAGNOSTIC TOOL” on page 9-32. b. Check the fault code number displayed on the Yamaha diagnostic tool. c. Identify the faulty system with the fault code number.
FUEL INJECTION SYSTEM YAMAHA DIAGNOSTIC TOOL EAS2GB7376 This model uses the Yamaha diagnostic tool to identify malfunctions. For information about using the Yamaha diagnostic tool, refer to the operation manual that is included with the tool. Yamaha diagnostic tool 90890-03231...
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NOTICE In order to avoid short circuit, insulate the battery connection terminals of the FI diagnostic tool sub-lead. For information on how to connect and use the Yamaha diagnostic tool, refer to “YAMAHA DIGNO- STIC TOOL OPERATION MANUAL”. 1. Vehicle 2.
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FUEL INJECTION SYSTEM Operation of the Yamaha diagnostic tool (Malfunction mode) Malfunction results are displayed in the top part of the window area. 1. Recovered The item list of the malfunction detected in the past (already recovered) are displayed. 2. Detected The item list of the malfunction currently occurred are displayed.
FUEL INJECTION SYSTEM 6. Condition The current conditions are displayed. (Detected/Recovered) 7. Symptom The symptoms of the detected malfunction are displayed. 8. Diagnosis code The diagnosis codes related to the detected malfunction are displayed. 9. FFD (only for models that can display freeze frame data) The mark “...
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FUEL INJECTION SYSTEM Fault code No. Crankshaft position sensor: no normal signals are received Item from the crankshaft position sensor. Improperly connected Connection of wire harness Crank the engine. ECU coupler. Connect the coupler securely Fault code number is not dis- played ...
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FUEL INJECTION SYSTEM • If fault code Nos. 13 and 14 are both displayed, perform the checks and maintenance jobs for fault code No. 13 first. • Before troubleshooting, disconnect the starter motor lead from the starter relay. Fault code No. Item Intake air pressure sensor: open or short circuit detected.
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FUEL INJECTION SYSTEM Fault code No. Item Intake air pressure sensor: open or short circuit detected. Defective intake air pressure Execute the diagnostic mode. Push the start switch. sensor. (Code No. 03) Fault code number is not dis- played Service is finished. When engine is stopped: Atmospheric pressure at the Fault code number is dis-...
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FUEL INJECTION SYSTEM Fault code No. Intake air pressure sensor: hose system malfunction (clogged Item or detached hose). Defective intake air pressure Execute the diagnostic mode. sensor. (Code No. 03) When engine is stopped: Atmospheric pressure at the current altitude and weather conditions is indicated.
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FUEL INJECTION SYSTEM Fault code No. Item Throttle position sensor: open or short circuit detected. Improperly connected Connection of wire harness Push the start switch. ECU coupler. Connect the coupler securely Fault code number is not dis- played Service is finished. Check the locking condition or repair/replace the wire har- of the coupler.
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FUEL INJECTION SYSTEM Fault code No. Item Throttle position sensor: open or short circuit detected. Malfunction in ECU. Replace the ECU. Before troubleshooting, disconnect the starter motor lead from the starter relay. Fault code No. Throttle position sensor: stuck throttle position sensor is de- Item tected.
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Able to drive vehicle Diagnostic code No. Diagnostic tool display Displays the coolant temperature. Procedure Compare the actually measured coolant temperature with the Yamaha diagnostic tool display value. Probable cause of malfunc- Confirmation of service Item Maintenance job tion and check completion Improperly connected ...
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Able to drive vehicle Diagnostic code No. Diagnostic tool display Displays the intake air temperature. Procedure Compare the actually measured intake air temperature with the Yamaha diagnostic tool display value. Probable cause of malfunc- Confirmation of service Item Maintenance job tion and check completion Improperly connected ...
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FUEL INJECTION SYSTEM Fault code No. Item Intake air temperature sensor: open or short circuit detected. Open or short circuit Re- Wire harness continuity. Push the start switch. place the wire harness. Fault code number is not dis- played Service is finished. Between intake air tempera- ture sensor coupler and ECU Fault code number is dis-...
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Actuation Actuates the ignition coil five times at one-second intervals. The engine trouble warning light and the “WARNING” on the Yamaha diagnostic tool screen come on each time the ignition coil is actuated. Procedure Check that a spark is generated five times.
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FUEL INJECTION SYSTEM Fault code No. Ignition coil: open or short circuit detected in the primary lead Item of the ignition coil. Improperly connected Connection of sub wire har- Start the engine and let it idle ness coupler.Check the lock- Connect the coupler secure- for approximately 5 seconds.
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Actuation Actuates injector five times at one-second intervals. The engine trouble warning light and the “WARNING” on the Yamaha diagnostic tool screen come on each time the injector is actuated. Procedure Check that injector is actuated five times by listening for the oper- ating sound.
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FUEL INJECTION SYSTEM Before troubleshooting, disconnect the starter motor lead from the starter relay. Fault code No. Item Lean angle sensor: open or short circuit detected. Fail-safe system Unable to start engine Able to drive vehicle Diagnostic code No. Diagnostic tool display Lean angle sensor output voltage •...
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FUEL INJECTION SYSTEM Fault code No. Fuel system voltage: incorrect voltage supplied to the fuel in- Item jector and fuel pump. Fail-safe system Able to start engine Able to drive vehicle Diagnostic code No. Diagnostic tool display Fuel system voltage Approximately 12.0 (V) Procedure Disconnect the main relay, and push the start switch or push down...
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FUEL INJECTION SYSTEM Before troubleshooting, disconnect the starter motor lead from the starter relay. Fault code No. EEPROM fault code number: an error is detected while read- Item ing or writing on EEPROM. Fail-safe system Able/Unable to start engine Able/Unable to drive vehicle Diagnostic code No.
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FUEL INJECTION SYSTEM Fault code No. Item Charging voltage is abnormal. Fail-safe system Able/Unable to start engine Able/Unable to drive vehicle Diagnostic code No. — Diagnostic tool display — Procedure — Probable cause of malfunc- Confirmation of service Item Maintenance job tion and check completion Improperly connected ...
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Confirmation of service Item Maintenance job tion and check completion Improperly connected Connection of Yamaha diag- Push the start switch. nostic tool coupler. Connect the coupler securely Fault code number is not dis- played Service is finished. Check the locking condition or repair/replace the wire har- of the coupler.
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Fault code number is not dis- played Service is finished. light green–light green Fault code number is dis- played Go to item 4. Yamaha diagnostic tool mal- Replace the Yamaha diag- Push the start switch. function. nostic tool.
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FUEL INJECTION SYSTEM Fault code No. Er-2 Signals from the ECU cannot be received within the specified Item period of time. Yamaha diagnostic tool mal- Replace the Yamaha diag- Push the start switch. function. nostic tool. Fault code number is not dis- played ...
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FUEL INJECTION SYSTEM Before troubleshooting, disconnect the starter motor lead from the starter relay. Fault code No. Er-4 Registered data cannot be received from the Yamaha diagnos- Item tic tool. Fail-safe system Able to start engine Able to drive vehicle Diagnostic code No.
FUEL PUMP SYSTEM TROUBLESHOOTING EAS2GB7380 The fuel pump fails to operate. Before troubleshooting, remove the following part(s): 1. Seat 2. Side cover (left/right) 3. Air scoop (left/right) 4. Fuel tank NG 1. Check the fuse. Replace the fuse(s). Refer to “CHECKING THE FUSES” on page 9-68.
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ELECTRICAL COMPONENTS Check each switch for continuity with the pocket tester. If the continuity reading is incorrect, check the wiring connections and if necessary, replace the switch. NOTICE Never insert the tester probes into the coupler terminal slots “1”. Always insert the probes from the opposite end of the coupler, taking care not to loosen or damage the leads.
ELECTRICAL COMPONENTS CHECKING THE BULBS AND BULB SOCK- EAS27990 WARNING Since the headlight bulb gets extremely hot, keep flammable products and your hands away from the bulb until it has cooled down. Do not check any of the lights that use LEDs. Check each bulb and bulb socket for damage NOTICE or wear, proper connections, and also for con-...
ELECTRICAL COMPONENTS 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 Analog pocket tester YU-03112-C ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼...
ELECTRICAL COMPONENTS 4. Install: • Seat Since VRLA (Valve Regulated Lead Acid) bat- • Side cover (left/right) teries are sealed, it is not possible to check the Refer to “GENERAL CHASSIS” on page 5- charge state of the battery by measuring the specific gravity of the electrolyte.
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ELECTRICAL COMPONENTS • When charging a battery, be sure to re- Example move it from the vehicle. (If charging has Open-circuit voltage = 12.0 V to be done with the battery mounted on the Charging time = 6.5 hours vehicle, disconnect the negative battery Charge of the battery = 20–30% lead from the battery terminal.) •...
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ELECTRICAL COMPONENTS b. Connect a charger and ammeter to the bat- tery and start charging. If the current is lower than the standard charg- ing current written on the battery, this type of Set the charging voltage to 16–17 V. If the set- battery charger cannot charge the VRLA (Valve ting is lower, charging will be insufficient.
ELECTRICAL COMPONENTS Starting circuit cut-off relay CHECKING THE RELAYS EAS2GB7386 Check each switch for continuity with the pock- et tester. If the continuity reading is incorrect, replace the relay. Pocket tester 90890-03112 Analog pocket tester YU-03112-C 1. Disconnect the relay from the wire harness. 2.
ELECTRICAL COMPONENTS CHECKING THE IGNITION SPARK GAP EAS2GB7388 Result 1. Check: Continuity • Ignition spark gap (between “3” to “4”) Out of specification Perform the ignition system troubleshooting, starting with step 4. EAS2GB7387 CHECKING THE DIODE Refer to “TROUBLESHOOTING” on page 9- 1.
ELECTRICAL COMPONENTS Out of specification Replace. Pocket tester Crankshaft position sensor resis- 90890-03112 tance Analog pocket tester 228–342 (Gy–B) YU-03112-C Test harness– lean angle sensor (6P) ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼ a. Connect the pocket tester ( 100) to the 90890-03209 crankshaft position sensor coupler.
ELECTRICAL COMPONENTS b. Measure the stator coil resistance. b. Check the starter motor operation. ▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲ ▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲ CHECKING THE RECTIFIER/REGULATOR EAS2GB7394 CHECKING THE STATOR COIL EAS28150 1. Check: 1. Disconnect: • Charging voltage • Stator coil coupler Out of specification Replace the rectifier/ (from the wire harness) regulator.
ELECTRICAL COMPONENTS 2. Check: • Positive tester probe • Coolant temperature sensor resistance Black “1” Out of specification Replace. • Negative tester probe Black “2” Coolant temperature sensor re- sistance 2.51–2.78 k at 20 °C (2.51–2.78 k at 68 °F) 210–221 ...
ELECTRICAL COMPONENTS • Positive tester probe Blue “1” • Negative tester probe Black/Blue “2” b. Check the throttle position sensor maximum resistance. ▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲ 3. Install: • Throttle position sensor When mounting the throttle position sensor, ad- ▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲ just its angle properly. Refer to “ADJUSTING EAS2GB7400 CHECKING THE THROTTLE POSITION THE THROTTLE POSITION SENSOR”...
ELECTRICAL COMPONENTS • Positive tester probe Blue “1” • Negative tester probe Black/Blue “2” b. Start the engine. c. Measure the intake air pressure sensor out- put voltage. ▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲ CHECKING THE INTAKE AIR TEMPERA- EAS2GB7403 c. Start the engine. TURE SENSOR d.
TROUBLESHOOTING • Incorrect spark plug heat range TROUBLESHOOTING EAS2GB7405 • Fouled spark plug • Worn or damaged electrode EAS2GB7406 GENERAL INFORMATION • Worn or damaged insulator 2. Ignition coil The following guide for troubleshooting does • Cracked or broken ignition coil body not cover all the possible causes of trouble.
TROUBLESHOOTING Fuel system FAULTY FRONT FORK LEGS EAS2GB7419 1. Throttle body • Damaged or loose throttle body joint Chassis 2. Air filter 1. Front fork • Clogged air filter element • Bent or damaged inner tube • Bent or damaged outer tube Chassis •...
TROUBLESHOOTING HEADLIGHT DOES NOT COME ON EAS2GB7421 Electrical system 1. Headlight • Fuse open circuit • Wrong headlight bulb • Too many electrical accessories • Hard charging • Incorrect connection • Improperly grounded circuit • Poor contacts (start switch) • Burnt-out headlight bulb HEADLIGHT BULB BURNT OUT EAS2GB7422 Electrical system...
9-52 nection Er-2 Signals from the ECU cannot be received within the specified period 9-53 of time. Er-3 Data from the ECU cannot be received correctly. 9-54 Er-4 Registered data cannot be received from the Yamaha diagnostic tool. 9-55 10-5...
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Intake air temperature Displays the intake air tem- Compare the actually mea- perature. sured intake air tempera- ture with the Yamaha diagnostic tool display val- Coolant temperature When engine is cold: Dis- Compare the actually mea- plays temperature closer to sured coolant temperature air temperature.
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LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS Diag- nostic Item Display Procedure code Malfunction history ( Replace all ( ) with ( code No. erasure *1 by the operation start pro- • There is no history. • 00 cessing. • There is some history. •...
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Actuates the ignition coil five Check that a spark is gener- times at one-second inter- ated five times. vals. • Connect an ignition “WARNING” on the Yamaha checker. diagnostic tool blinks five times when the ignition coil is actuated. Injector...
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WIRING DIAGRAM EAS2GB7426 EAS2GB7427 COLOR CODE WR250F/WR250FG 2016 Black 1. Joint connector Brown 2. Joint connector Chocolate 3. Joint connector 4. AC magneto Dark green 5. Rectifier/regulator Green 6. Headlight relay Gray 7. Main relay 8. Engine ground Blue 9. Battery Light green 10.
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PRINTED ON RECYCLED PAPER PRINTED IN JAPAN...
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WR250F/WR250FG 2016 WR250F/WR250FG 2016 SCHÉMA DE CÂBLAGE WIRING DIAGRAM B B B R R R Br Br Br B B B R R R/L Br Br B B B B B B R R R R R R/L Br Br Br Br Br B/L Gy (Gy) (Gy)