Yamaha Fascino S 2021 Supplementary Service Manual
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Yamaha Fascino S 2021 Supplementary Service Manual

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2021
SUPPLEMENTARY
SERVICE MANUAL
LCX125D
LCX125
B7J-F8197-E1

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Summary of Contents for Yamaha Fascino S 2021

  • Page 1 2021 SUPPLEMENTARY SERVICE MANUAL LCX125D LCX125 B7J-F8197-E1...
  • Page 2 FASCINO (LCX125) 2020 SERVICE MANUAL: B7J-F8197-E0 Fascino S (LCX125D) and Fascino (LCX125) 2021 SUPPLEMENTARY SERVICE MANUAL ©2021 by India Yamaha Motor Pvt. Ltd. First edition, June 2021 All rights reserved. Any reproduction or unauthorized use without the written permission of India Yamaha Motor Pvt.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS GENERAL INFORMATION SPECIFICATIONS CHASSIS ENGINE FUEL SYSTEM ELECTRICAL SYSTEM...

  • Page 5: General Information

    GENERAL INFORMATION FEATURES..................... 1-1 INDICATOR LIGHTS AND WARNING LIGHTS ........1-1 MULTI-FUNCTION METER UNIT ............1-1 HANDLEBAR SWITCHES................ 1-2 SPECIAL TOOLS ................... 1-4...
  • Page 6 3. Fuel meter tected in the electrical circuit monitoring the en- 4. “SELECT” button gine. If this occurs, have a Yamaha dealer check the self-diagnostic system. The electrical circuit of the warning light can be checked by turning the vehicle on. The warning light should come on for a few seconds, and then go off.
  • Page 7 3. Horn switch “ ” If the last segment continues to flash after fuel- Right ing, or if all segments are flashing, have a Yamaha dealer check the electrical system. EAUE4600 Multi-function display The multi-function display is equipped with the following: •...
  • Page 8 FEATURES INFO The lights will come on when the engine is start- ed and remain on until the key is set to “ ”. EAU12461 Turn signal switch “ / ” To signal a right-hand turn, push this switch to “...
  • Page 9 SPECIAL TOOLS INFO EAS00027 SPECIAL TOOLS The following special tools are necessary for complete and accurate tune-up and assembly. Use only the appropriate special tools as this will help prevent damage caused by the use of inappropriate tools or improvised techniques. Special tools, part numbers or both may differ depending on the country. When placing an order, refer to the list provided below to avoid any mistakes.
  • Page 10 SPECIAL TOOLS INFO Tool name/Tool No. Illustration Steering C-spanner S 1108 (90890-01268) This tool is used to loosen and tighten the steering ring nut. Magneto puller S 1109 (90890-01189) This tool is used to remove the AC magneto rotor with the help of magneto holder. Rotor holder tool S 1113 (90890-01235)
  • Page 11 SPECIAL TOOLS INFO Tool name/Tool No. Illustration Lower bearing inner race installer S 1170 Ø30X40.5XØ48 Ø48 Ø30 S 1170 This tool is used to install the bearings. Bearing punch with pilot driver (ø8mm) YSST-951 S 1122 This tool is used to install the bearings. Piston pin replacer YSST-207A (90890-01304)
  • Page 12 SPECIAL TOOLS INFO Tool name/Tool No. Illustration Piston base YSST-604 (90890-01067) This tool is used to support the piston. Small screw driver YSST-609 This tool is used to adjust throttle screw/retract tim- ing chain tensioner. Scraper YSST-612 This tool is used to scrap the sealant from crank- case surface.
  • Page 13 SPECIAL TOOLS INFO Tool name/Tool No. Illustration Bearing puller 6202 YSST-624 This tool is used to remove the bearings of main axle (transmission cover). Bearing puller 6203 YSST-624 A This tool is used to remove the bearing of drive axle (left crankcase).
  • Page 14 Yamaha diagnostic tool INS-018 (90890-03267) This tool is used to diagnose electrical fault in ad- vance fuel injection system. Yamaha diagnostic tool (Ver.3) INS-019 (90890-03264) This tool is used to diagnose electrical fault in ad- vance fuel injection system. Sub harness 3...

  • Page 15: Specifications

    SPECIFICATIONS GENERAL SPECIFICATIONS ............... 2-1 MAINTENANCE SPECIFICATIONS (ENGINE) ..........2-2 CHASSIS SPECIFICATIONS ................. 2-5 ELECTRICAL SPECIFICATIONS ..............2-7 TIGHTENING TORQUES ................2-9 GENERAL TIGHTENING TORQUE SPECIFICATIONS ......2-9 ENGINE TIGHTENING TORQUES ............2-10 CHASSIS TIGHTENING TORQUES ............2-12 LUBRICATION POINTS AND LUBRICANT TYPES ........2-15 ENGINE....................

  • Page 16: General Specifications

    SPEC GENERAL SPECIFICATIONS GENERAL SPECIFICATIONS Model Model LCX125D:- B7J5 (Disc), B7JM (Disc) LCX125:- B7JK (Disc), B7JN (Disc), B7JL (Drum), B7JP (Drum) Dimensions Overall length 1920 mm (75.6 in) Overall width 685 mm (27.0 in) Overall height 1150 mm (45.3 in) Wheelbase 1280 mm (50.4 in) Ground clearance...

  • Page 17: Maintenance Specifications (Engine)

    SPEC MAINTENANCE SPECIFICATIONS (ENGINE) MAINTENANCE SPECIFICATIONS (ENGINE) Engine Combustion cycle 4-stroke Cooling system Air cooled Valve train SOHC Displacement 125 cm³ Number of cylinders Single cylinder Bore  stroke 52.4  57.9 mm (2.06  2.28 in) Compression ratio 10.2 : 1 Compression pressure 1522–1960 kPa/870 r/min (15.2–19.6 kgf/cm²/ 870 r/min, 216.5–278.8 psi/870 r/min)
  • Page 18 SPEC MAINTENANCE SPECIFICATIONS (ENGINE) Valve, valve seat, valve guide Valve clearance (cold) Intake 0.06–0.10 mm (0.0024–0.0039 in) Exhaust 0.22–0.26 mm (0.0087–0.0102 in) Valve dimensions Valve seat contact width limit (intake) 1.4 mm (0.06 in) Valve seat contact width limit (exhaust) 1.7 mm (0.07 in) Valve stem diameter limit (intake) 4.945 mm (0.1947 in)
  • Page 19 SPEC MAINTENANCE SPECIFICATIONS (ENGINE) Automatic centrifugal clutch Clutch shoe thickness limit 2.1 mm (0.08 in) Clutch housing inside diameter limit 125.5 mm (4.94 in) Clutch-in revolution 2200–2600 r/min Clutch-stall revolution 4200–4800 r/min V-belt V-belt width limit 19.0 mm (0.75 in) Drivetrain Primary reduction ratio Transmission type...

  • Page 20: Chassis Specifications

    SPEC CHASSIS SPECIFICATIONS CHASSIS SPECIFICATIONS Chassis Frame type Underbone Caster angle 26.4 ° Trail 91 mm (3.6 in) Front wheel Wheel type Cast wheel J12  1.85 Rim size Radial wheel runout limit 2.0 mm (0.08 in) Lateral wheel runout limit 0.5 mm (0.02 in) Wheel axle bending limit 0.25 mm (0.01 in)
  • Page 21 Fork spring free length (limit) 248.1 mm (9.77 in) Inner tube bending limit 0.2 mm (0.01 in) Recommended oil Yamaha Suspension Oil G10 Quantity (left) 54.0 cm³ (1.83 US oz, 1.90 Imp.oz) Quantity (right) 54.0 cm³ (1.83 US oz, 1.90 Imp.oz) Level (left) 85 mm (3.3 in)

  • Page 22: Electrical Specifications

    SPEC ELECTRICAL SPECIFICATIONS ELECTRICAL SPECIFICATIONS Voltage System voltage 12 V Engine control unit Model B7J1 (For disc) B7J2 (For drum) Ignition system Ignition timing (B.T.D.C.) 3.0–7.0 °/1300 r/min Ignition coil Primary coil resistance 2.34–2.86 k Secondary coil resistance 9.45–11.55 k Spark plug cap Resistance 4.00–6.00 k...
  • Page 23 SPEC ELECTRICAL SPECIFICATIONS Fuel sender unit 4.0–10.0  Sender unit resistance (full) 90.0–100.0  Sender unit resistance (empty) Fuel injection sensor 217–325  Crankshaft position sensor resistance 5700–6300  at 0 °C (5700–6300  at 32 °F) Intake air temperature sensor resistance Atmospheric pressure sensor output voltage 3.88–4.12 V at 101.3 kPa (3.88–4.12 V at 1.01 kgf/cm², 3.88-4.12 V at...

  • Page 24: Tightening Torques

    SPEC TIGHTENING TORQUES EAS20320 TIGHTENING TORQUES EAS20330 GENERAL TIGHTENING TORQUE SPECIFICATIONS This chart specifies tightening torques for stan- dard fasteners with a standard ISO thread pitch. Tightening torque specifications for special com- ponents or assemblies are provided for each chapter of this manual. To avoid warpage, tighten multi-fastener assemblies in a crisscross pattern and progressive stages until the speci- fied tightening torque is reached.

  • Page 25: Engine Tightening Torques

    SPEC TIGHTENING TORQUES EAS20013 ENGINE TIGHTENING TORQUES Thread Item Q’ty Tightening torque Remarks size Cylinder head nut (initial torque) 10 N·m (1.0 kgf·m, 7.4 lb·ft) Cylinder head nut (final torque) 27 N·m (2.7 kgf·m, 20 lb·ft) Spark plug 13 N·m (1.3 kgf·m, 9.6 lb·ft) Cylinder head bolt 10 N·m (1.0 kgf·m, 7.4 lb·ft) Cylinder head stud bolt (for muffler)
  • Page 26 SPEC TIGHTENING TORQUES Thread Item Q’ty Tightening torque Remarks size Contact Engine oil filler plug closely spot face Contact Transmission oil filler plug closely spot face V-belt case cover bolt 10 N·m (1.0 kgf·m, 7.4 lb·ft) Cover bolt (V-belt case cover) 10 N·m (1.0 kgf·m, 7.4 lb·ft) V-belt case air filter element cover 10 N·m (1.0 kgf·m, 7.4 lb·ft)

  • Page 27: Chassis Tightening Torques

    SPEC TIGHTENING TORQUES EAS30017 CHASSIS TIGHTENING TORQUES Thread Item Q’ty Tightening torque Remarks size Engine bracket and frame nut 50 N·m (5.0 kgf·m, 37 lb·ft) Engine bracket and engine nut 54 N·m (5.4 kgf·m, 40 lb·ft) Front fender and lower bracket bolt 12 N·m (1.2 kgf·m, 8.9 lb·ft) Front fender bolt 6 N·m (0.6 kgf·m, 4.4 lb·ft)
  • Page 28 SPEC TIGHTENING TORQUES Thread Item Q’ty Tightening torque Remarks size Ignition coil assembly bolt 7 N·m (0.7 kgf·m, 5.2 lb·ft) Seat lock cable screw (at main switch) 1.8 N·m (0.18 kgf·m, 1.3 lb·ft) SGCU (starter generator control unit) 9 N·m (0.9 kgf·m, 6.6 lb·ft) assembly bolt Main switch bolt 7 N·m (0.7 kgf·m, 5.2 lb·ft)
  • Page 29 SPEC TIGHTENING TORQUES Thread Item Q’ty Tightening torque Remarks size Rear brake camshaft lever bolt 7 N·m (0.7 kgf·m, 5.2 lb·ft) Rear wheel nut 150 N·m (15.0 kgf·m, 111 lb·ft) Brake lever bolt (drum) 1.5 N·m (0.15 kgf·m, 1.1 lb·ft) Brake lever nut 6 N·m (0.6 kgf·m, 4.4 lb·ft) Pivot pin and crankcase nut (rear...

  • Page 30: Lubrication Points And Lubricant Types

    Kickstarter pinion gear shaft Kick torsion spring Drive axle and bearing (contact surface) Primary shave nut and conical washer Timing chain tensioner bolts Yamaha bond No.1215® Crankcase mating surfaces Yamaha bond No.1215® Crankcase (oil pump cover bolt) Yamaha bond No.1215®...
  • Page 31 SPEC LUBRICATION POINTS AND LUBRICANT TYPES EAS1MC1085 CHASSIS Lubrication point Lubricant Steering bearing and oil seal Throttle grip tube guide inner surface and throttle cable end Brake lever pivoting point and metal-to-metal moving parts Front wheel oil seal Speedometer gear assembly and oil seal Sidestand pivoting point, metal-to-metal moving parts and nut inner surface Centerstand shaft pivoting point and metal-to-metal moving parts Sidestand spring hook portion...
  • Page 32 SPEC CABLE ROUTING Change of wire harness (Speedo meter) routing. Speedometer cable 2-17...

  • Page 33: Chassis

    CHASSIS GENERAL CHASSIS..................3-1 HANDLEBAR ....................3-3 FRONT FORK....................3-6...
  • Page 34 CHAS GENERAL CHASSIS GENERAL CHASSIS Removing the rear side covers and rear fender (For disc model) 1.8 N·m (0.18 kgf·m, 1.3 lb·ft) 7 N·m (0.7 kgf·m, 5.2 lb·ft) 12 N·m (1.2 kgf·m, 8.9 lb·ft) 12 N·m (1.2 kgf·m, 8.9 lb·ft) 3.8 N·m (0.38 kgf·m, 2.8 lb·ft) 1.5 N·m (0.15 kgf·m, 1.1 lb·ft) 1.8 N·m (0.18 kgf·m, 1.3 lb·ft)
  • Page 35 CHAS GENERAL CHASSIS Removing the Front upper cover, front side covers assembly and side moles (For disc model) N·m ( 0.18 kgf·m, lb·ft) N·m ( kgf·m, lb·ft) N·m ( 0.18 kgf·m, lb·ft) N·m ( 0.18 kgf·m, lb·ft) Order Job/Parts to remove Q’ty Remarks Refer to “GENERAL CHASSIS”...
  • Page 36 CHAS HANDLEBAR HANDLEBAR Removing the handlebar (For disc model) 23 N·m (2.3 kgf·m, 17 lb·ft) 10 N·m (1.0 kgf·m, 7.4 lb·ft) 1.8 N·m (0.18 kgf·m, 1.3 lb·ft) 1.4 N·m (0.14 kgf·m, 1.0 lb·ft) 6 N·m (0.6 kgf·m, 4.4 lb·ft) 6 N·m (0.6 kgf·m, 4.4 lb·ft) N·m (0.
  • Page 37 CHAS HANDLEBAR Removing the handlebar (For disc model) 23 N·m (2.3 kgf·m, 17 lb·ft) 10 N·m (1.0 kgf·m, 7.4 lb·ft) 1.8 N·m (0.18 kgf·m, 1.3 lb·ft) 1.4 N·m (0.14 kgf·m, 1.0 lb·ft) 6 N·m (0.6 kgf·m, 4.4 lb·ft) 6 N·m (0.6 kgf·m, 4.4 lb·ft) N·m (0.
  • Page 38 CHAS HANDLEBAR Removing the handlebar (For disc model) 23 N·m (2.3 kgf·m, 17 lb·ft) 10 N·m (1.0 kgf·m, 7.4 lb·ft) 1.8 N·m (0.18 kgf·m, 1.3 lb·ft) 1.4 N·m (0.14 kgf·m, 1.0 lb·ft) 6 N·m (0.6 kgf·m, 4.4 lb·ft) 6 N·m (0.6 kgf·m, 4.4 lb·ft) N·m (0.
  • Page 39 CHAS FRONT FORK FRONT FORK Removing the front fork legs 53 N·m (5.3 kgf·m, 39 lb·ft) 6 N·m (6.0 kgf·m, 4.4 lb·ft) 12 N·m (1.2 kgf·m, 8.9 lb·ft) 7 N·m (0.7 kgf·m, 5.2 lb·ft) Order Job/Parts to remove Q’ty Remarks Refer to “GENERAL CHASSIS”...
  • Page 40 CHAS FRONT FORK...

  • Page 41: Engine

    ENGINE OIL PUMP....................... 4-1 CHECKING THE OIL STRAINER ............4-2 CHECKING THE OIL PUMP ..............4-2 ASSEMBLING THE OIL PUMP..............4-2...
  • Page 42 OIL PUMP EAS20054 OIL PUMP Removing the oil pump * Apply Yamaha bond No.1215. Order Job/Parts to remove Q’ty Remarks Engine oil Refer to “STARTER GENERATOR” in base SMG (starter motor generator) rotor/stator coil service manual B7J-F8197-E0 on page assembly 5-42.
  • Page 43 OIL PUMP EAS30340 CHECKING THE OIL STRAINER 1. Check: • Oil strainer Damage  Replace. Contaminants  Clean with solvent. EAS30337 CHECKING THE OIL PUMP 1. Check: • Oil pump drive gear • Oil pump driven gear • Oil pump housing •...
  • Page 44 OIL PUMP...

  • Page 45: Fuel System

    FUEL SYSTEM FUEL INJECTOR.................... 5-1 REMOVING THE FUEL HOSE ..............5-2 CHECKING THE FUEL INJECTOR ............5-2 INSTALLING THE FUEL INJECTOR ............5-2 INSTALLING THE FUEL HOSE ............... 5-2 AIR FILTER CASE ..................5-4 THROTTLE BODY..................5-5...
  • Page 46 FUEL INJECTOR EAS20191 FUEL INJECTOR Removing the fuel injector N·m ( kgf·m, lb·ft) Order Job/Parts to remove Q’ty Remarks Refer to “GENERAL CHASSIS” in base Seat/storage compartment service manual B7J-F8197-E0 on page 4-3. Fuel injector coupler Disconnect. Fuel hose Disconnect. Fuel injector O-ring For installation, reverse the removal proce-...
  • Page 47 FUEL INJECTOR EAS31250 EAS31617 REMOVING THE FUEL HOSE INSTALLING THE FUEL INJECTOR 1. Disconnect: 1. Install: • Fuel hose • Fuel injector “1” • O-ring “2” WARNING Cover fuel hose connections with a cloth when disconnecting them. Residual pres- sure in the fuel lines could cause fuel to spurt out when removing the hoses.
  • Page 48 FUEL INJECTOR • Install the fuel hose securely onto the fuel in- jector until a distinct “click” is heard. • To install the fuel hose onto the fuel injector, slide the fuel hose connector cover “1” on the end of the hose in the direction of the arrow shown.
  • Page 49 AIR FILTER CASE EAS20068 AIR FILTER CASE Removing the air filter case N·m ( kgf·m, lb·ft) To CVT N·m (0. kgf·m, 0.95 lb·ft) N·m ( N·m ( 0.25 0.25 kgf·m, kgf·m, lb·ft) lb·ft) To Cylinder head N·m ( kgf·m, lb·ft) N·m (0.
  • Page 50 THROTTLE BODY EAS20070 THROTTLE BODY Removing the throttle body N·m ( kgf·m, lb·ft) N·m ( kgf·m, lb·ft) N·m ( kgf·m, lb·ft) 7 N·m (0.7 kgf·m, 5.2 lb·ft) N·m ( kgf·m, lb·ft) Order Job/Parts to remove Q’ty Remarks Refer to “GENERAL CHASSIS” in base Seat/storage compartment service manual B7J-F8197-E0 on page 4-3.
  • Page 51 THROTTLE BODY Removing the throttle body N·m ( kgf·m, lb·ft) N·m ( kgf·m, lb·ft) N·m ( kgf·m, lb·ft) 7 N·m (0.7 kgf·m, 5.2 lb·ft) N·m ( kgf·m, lb·ft) Order Job/Parts to remove Q’ty Remarks Intake manifold O-ring Joint (gasket) Intake manifold gasket Throttle body O-ring ISC (Idle Speed Control) unit holder...
  • Page 52 THROTTLE BODY...

  • Page 53: Electrical System

    ELECTRICAL SYSTEM IGNITION SYSTEM (For Disc)............... 6-1 CIRCUIT DIAGRAM ................. 6-1 IGNITION SYSTEM (For Drum)..............6-3 CIRCUIT DIAGRAM ................. 6-3 ELECTRIC STARTING SYSTEM (For Disc) ..........6-5 CIRCUIT DIAGRAM ................. 6-5 ELECTRIC STARTING SYSTEM (For Drum) ..........6-7 CIRCUIT DIAGRAM ................. 6-7 STOP AND START SYSTEM (For Disc) ............
  • Page 54 FUEL PUMP SYSTEM (For Disc)..............6-29 CIRCUIT DIAGRAM ................6-29 FUEL PUMP SYSTEM (For Drum) .............. 6-31 CIRCUIT DIAGRAM ................6-31 ELECTRICAL COMPONENTS..............6-33 CHECKING THE SWITCHES (For Disc)..........6-35...

  • Page 56: Ignition System (For Disc)

    – ELEC IGNITION SYSTEM (For Disc) IGNITION SYSTEM (For Disc) CIRCUIT DIAGRAM...
  • Page 57 – ELEC IGNITION SYSTEM (For Disc) 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 10.Main switch 19.SGCU (Starter generator control unit) 20.Joint connection 2 21.Ignition coil 22.Spark plug 23.Crankshaft position sensor 28.Starter generator...

  • Page 58: Ignition System (For Drum)

    – ELEC IGNITION SYSTEM (For Drum) IGNITION SYSTEM (For Drum) CIRCUIT DIAGRAM 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 10.Main switch 18.SGCU (Starter generator control unit) 19.Joint connection 2 20.Ignition coil 21.Spark plug...
  • Page 59 – ELEC IGNITION SYSTEM (For Drum) 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 10.Main switch 18.SGCU (Starter generator control unit) 19.Joint connection 2 20.Ignition coil 21.Spark plug 22.Crankshaft position sensor 27.Starter generator...

  • Page 60: Electric Starting System (For Disc)

    – ELEC ELECTRIC STARTING SYSTEM (For Disc) ELECTRIC STARTING SYSTEM (For Disc) CIRCUIT DIAGRAM...
  • Page 61 – ELEC ELECTRIC STARTING SYSTEM (For Disc) 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 8. Sub fuse 2 10.Main switch 11.Main relay 14.Rear brake light switch 15.Front brake light switch 16.Joint connection 3 19.SGCU (Starter generator control unit)

  • Page 62: Electric Starting System (For Drum)

    – ELEC ELECTRIC STARTING SYSTEM (For Drum) ELECTRIC STARTING SYSTEM (For Drum) CIRCUIT DIAGRAM...
  • Page 63 – ELEC ELECTRIC STARTING SYSTEM (For Drum) 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 8. Sub fuse 2 10.Main switch 12.Main relay 14.Front brake light switch 15.Joint connection 3 18.SGCU (Starter generator control unit) 22.Crankshaft position sensor...
  • Page 64 – ELEC STOP AND START SYSTEM (For Disc) STOP AND START SYSTEM (For Disc) CIRCUIT DIAGRAM...

  • Page 65: Stop And Start System (For Disc)

    5. Main fuse 6. Backup fuse 7. Sub fuse 10.Main switch 11.Main relay 16.Joint connection 3 18.YDT (Yamaha diagnostic tool) coupler 19.SGCU (Starter generator control unit) 23.Crankshaft position sensor 24.Engine temperature sensor 26.MAQS (Modularized air quantity sensor) 28.Starter generator 29.Sidestand switch 33.Joint connection 4...

  • Page 66: Circuit Diagram

    – ELEC STOP AND START SYSTEM (For Drum) STOP AND START SYSTEM (For Drum) CIRCUIT DIAGRAM 6-11...

  • Page 67: Stop And Start System (For Drum)

    5. Main fuse 6. Backup fuse 7. Sub fuse 10.Main switch 12.Main relay 15.Joint connection 3 17.YDT (Yamaha diagnostic tool) coupler 18.SGCU (Starter generator control unit) 22.Crankshaft position sensor 23.Engine temperature sensor 25.MAQS (Modularized air quantity sensor) 27.Starter generator 28.Sidestand switch 33.Joint connection 4...

  • Page 68: Circuit Diagram

    – ELEC CHARGING SYSTEM (For Disc) CHARGING SYSTEM (For Disc) CIRCUIT DIAGRAM 6-13...
  • Page 69 – ELEC CHARGING SYSTEM (For Disc) 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 10.Main switch 11.Main relay 16.Joint connection 3 19.SGCU (Starter generator control unit) 23.Crankshaft position sensor 28.Starter generator 65.Engine ground 1...

  • Page 70: Circuit Diagram

    – ELEC CHARGING SYSTEM (For Drum) CHARGING SYSTEM (For Drum) CIRCUIT DIAGRAM 6-15...
  • Page 71 – ELEC CHARGING SYSTEM (For Drum) 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 10.Main switch 12.Main relay 15.Joint connection 3 18.SGCU (Starter generator control unit) 22.Crankshaft position sensor 27.Starter generator 63.Engine ground 1...

  • Page 72: Circuit Diagram

    – ELEC LIGHTING SYSTEM (For Disc) EAS20075 LIGHTING SYSTEM (For Disc) CIRCUIT DIAGRAM 6-17...
  • Page 73 – ELEC LIGHTING SYSTEM (For Disc) 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 9. Terminal fuse 1 10.Main switch 19.SGCU (Starter generator control unit) 28.Starter generator 38.Dimmer/Pass switch 39.Headlight switch 40.Meter assembly...

  • Page 74: Circuit Diagram

    – ELEC LIGHTING SYSTEM (For Drum) EAS20075 LIGHTING SYSTEM (For Drum) CIRCUIT DIAGRAM 6-19...
  • Page 75 – ELEC LIGHTING SYSTEM (For Drum) 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 9. Terminal fuse 1 10.Main switch 18.SGCU (Starter generator control unit) 27.Starter generator 38.Dimmer switch 39.Meter assembly 46.Meter light...

  • Page 76: Circuit Diagram

    – ELEC SIGNALING SYSTEM (For Disc) SIGNALING SYSTEM (For Disc) CIRCUIT DIAGRAM 6-21...
  • Page 77 – ELEC SIGNALING SYSTEM (For Disc) 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 8. Sub fuse 2 10.Main switch 12.Horn 13.Turn signal relay 14.Rear brake light switch 15.Front brake light switch 19.SGCU (Starter generator control unit) 28.Starter generator...

  • Page 78: Circuit Diagram

    – ELEC SIGNALING SYSTEM (For Drum) SIGNALING SYSTEM (For Drum) CIRCUIT DIAGRAM 6-23...
  • Page 79 – ELEC SIGNALING SYSTEM (For Drum) 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 8. Sub fuse 2 10.Main switch 11.Turn signal relay 13.Horn 14.Front brake light switch 18.SGCU (Starter generator control unit) 27.Starter generator 32.Fuel sender...

  • Page 80: Circuit Diagram

    – ELEC FUEL INJECTION SYSTEM (For Disc) FUEL INJECTION SYSTEM (For Disc) CIRCUIT DIAGRAM 6-25...
  • Page 81 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 8. Sub fuse 2 10.Main switch 17.Injector 18.YDT (Yamaha diagnostic tool) coupler 19.SGCU (Starter generator control unit) 20.Joint connection 2 21.Ignition coil 22.Spark plug 23.Crankshaft position sensor 24.Engine temperature sensor 25.ISC (Idle speed control) unit...

  • Page 82: Circuit Diagram

    – ELEC FUEL INJECTION SYSTEM (For Drum) FUEL INJECTION SYSTEM (For Drum) CIRCUIT DIAGRAM 6-27...
  • Page 83 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 8. Sub fuse 2 10.Main switch 16.Injector 17.YDT (Yamaha diagnostic tool) coupler 18.SGCU (Starter generator control unit) 19.Joint connection 2 20.Ignition coil 21.Spark plug 22.Crankshaft position sensor 23.Engine temperature sensor 24.ISC (Idle speed control) unit...

  • Page 84: Circuit Diagram

    – ELEC FUEL PUMP SYSTEM (For Disc) FUEL PUMP SYSTEM (For Disc) CIRCUIT DIAGRAM 6-29...

  • Page 85: Fuel Pump System (For Disc)

    – ELEC FUEL PUMP SYSTEM (For Disc) 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 10.Main switch 19.SGCU (Starter generator control unit) 31.Fuel pump 65.Engine ground 1 66.Engine ground 2 6-30...

  • Page 86: Circuit Diagram

    – ELEC FUEL PUMP SYSTEM (For Drum) FUEL PUMP SYSTEM (For Drum) CIRCUIT DIAGRAM 6-31...
  • Page 87 – ELEC FUEL PUMP SYSTEM (For Drum) 1. Battery 2. Battery positive lead 3. Battery negative lead 4. Fuse box 5. Main fuse 6. Backup fuse 7. Sub fuse 10.Main switch 18.SGCU (Starter generator control unit) 31.Fuel pump 63.Engine ground 1 64.Engine ground 2 6-32...

  • Page 88: Electrical Components

    – ELEC ELECTRICAL COMPONENTS EAS20089 ELECTRICAL COMPONENTS Analogue Meter Digital Meter 10,11,12,13,14 16, 17 6-33...
  • Page 89 – ELEC ELECTRICAL COMPONENTS 1. Turn signal relay 2. Rear brake light switch 3. Front brake light switch 4. Meter assembly 5. Main switch 6. Main relay 7. Ignition coil 8. SGCU (starter generator control unit) 9. Fuel pump 10.Intake air pressure sensor 11.Intake air temperature sensor 12.Throttle position sensor 13.ISC (idle speed control) unit...

  • Page 90: Checking The Switches (For Disc)

    – ELEC ELECTRICAL COMPONENTS EAS30549 CHECKING THE SWITCHES (For Disc) Check each switch for continuity with the multimeter. If the continuity reading is incorrect, check the wir- ing connections and if necessary, replace the switch. Pass Br/Y Br/L Br/Y Br/L 1.
  • Page 91 16. Joint connection 3 Br/L Brown/Blue 64. Junction (Ground) 17. Injector Br/W Brown/White 65. Engine ground 1 18. YDT (Yamaha diagnostic tool) Br/Y Brown/Yellow 66. Engine ground 2 coupler Green/Blue 67. Engine ground 3 19. SGCU (Starter generator con- Green/Red 68.
  • Page 92 64. Engine ground 2 15. Joint connection 3 Br/B Brown/Black 65. Engine ground 3 16. Injector Br/L Brown/Blue 66. Body ground 17. YDT (Yamaha diagnostic tool) Br/W Brown/White coupler Br/Y Brown/Yellow 18. SGCU (Starter generator con- Green/Blue trol unit) Green/Red 19.
  • Page 94 B7J-F8197-E1 1Y238(SSM-01)1548-6-21-E...
  • Page 95 LCX125D/LCX125 2021 (For disc) WIRING DIAGRAM...
  • Page 96 LCX125 2021 (For drum) WIRING DIAGRAM...

This manual is also suitable for:

Fascino 2021Lcx125dLcx125

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