Yamaha YFM125S Service Manual Download Page 40 | Manualshive

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YAMAHA MOTOR CO., LTD.

2500 SHINGAI IWATA SHIZUOKA JAPAN

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Summary of Contents for YFM125S

Page 1: ...YFM125S3FA AE2 SUPPLEMENTARY SERVICE MANUAL...

Page 2: ......

Page 3: ...e this Supplementary Service Manual together with the following manual YFA1W SERVICE MANUAL 3FA ME1 YFA1 P 2002 SUPPLEMENTARY SERVICE MANUAL 3FA AE1 YFM125S SUPPLEMENTARY SERVICE MANUAL 2004 by Yamaha...

Page 4: ...ons and sig nificant changes in specifications or procedures will be forwarded to all authorized Yamaha dealers and will appear in future editions of this manual where applicable NOTE _ Designs and sp...

Page 5: ...arts and clarify procedure steps there are exploded diagrams at the start of each removal and disassembly section 1 An easy to see exploded diagram 4 is provided for removal and disassembly jobs 2 Num...

Page 6: ...arance D Engine speed E V A Illustrated symbols F to L in the exploded diagrams indicate the types of lubricants and lubrication points F Apply engine oil G Apply gear oil H Apply molybdenum disulfide...

Page 7: ...BUMPER AND CENTER COVER 17 FRONT GRILL ASSEMBLY AND FRONT FENDER 19 REAR CARRIER AND REAR FENDER 20 ELECTRICAL 22 ADJUSTING THE HEADLIGHT BEAMS 22 REPLACING A HEADLIGHT BULB 22 ELECTRICAL 24 IGNITION...

Page 8: ......

Page 9: ...kg 220 lb Fuel Type Regular unleaded gasoline only for CDN and Europe Unleaded gasoline only for Oceania Fuel tank capacity 7 6 L 1 67 Imp gal 2 01 US gal Reserve amount 1 3 L 0 28 Imp gal 0 34 US gal...

Page 10: ...1 1 1 Pilot screw P S 2 and 1 2 turns out for Europe and Oceania Valve seat size V S 1 8 Starter jet G S 45 Fuel level F L 3 5 4 5 mm 0 14 0 18 in With special tool Engine idling speed 1 650 1 750 r...

Page 11: ...Semi conductor short circuit type No load regulated voltage DC 14 0 15 0 V Rectifier capacity 14 0 A Withstand voltage 200 V Electric starting system Type Constant mesh Starter motor Model manufacture...

Page 12: ...el tank breather hose 7 Horn switch lead for Europe 8 Horn switch for Europe 9 Headlight lead left 0 Headlight lead right A Neutral reverse indicator light lead B Main switch lead C Coupler cover D St...

Page 13: ...dlebar switch lead and horn switch lead with two plas tic bands for Europe Do not pull the wire harness after fastening it When installing the front fender do not pinch the coupler cover Pass the lead...

Page 14: ...s 8 Front brake switch lead Pass the front brake cable and rear brake cable through the cable guide for CDN and Oceania Pass the front brake cable rear brake cable and horn switch lead through the cab...

Page 15: ...able Put the cover on the couplers and then fasten a plastic band around the middle of the cover Route the rear brake switch lead and the handle bar switch lead behind the throttle cable and the rear...

Page 16: ...rn lead for Europe 8 Horn for Europe 9 Starter motor lead 0 A C magneto lead A Starter motor Fasten the wire harness starter motor lead and transmission case breather hose to the frame with a plastic...

Page 17: ...ender Do not leave any slack in the main switch lead and wire har ness under the front fender Face the end of the transmission case breather hose down Fasten the wire harness starter motor lead and re...

Page 18: ...he plastic band should be toward the rear of the vehicle facing inward Fasten the starter motor lead and A C magneto lead with a plastic locking tie Fasten the A C magneto lead with the holders Route...

Page 19: ...tarting circuit cut off relay 5 Starter relay 6 Positive battery lead 7 Negative battery lead 8 Transmission case breather hose 9 Reverse switch 0 Neutral switch lead A Reverse switch lead B Starter m...

Page 20: ...harness with the front end of the frame support as shown Route the fuel overflow hose in front of the trans mission case breather hose Install both the holder and the negative battery lead terminal t...

Page 21: ...battery lead neutral switch lead reverse switch lead and starter motor lead to the frame with a plastic band The end of the plastic band should be toward the rear of the vehicle facing inward 60 mm 2...

Page 22: ...e rear brake cable to the outside of the frame Place the end of the fuel tank breather hose in the rubber fuel overflow tray Pass the fuel tank breather hose through the hole in the handlebar cover Ro...

Page 23: ...ad 4 Wire harness 5 Transmission case breather hose 6 Ignition coil 7 Negative battery leads 8 Positive battery lead 9 Air vent hose 0 Crankcase breather hose A Starter cable B Starting circuit cut of...

Page 24: ...me Pass the air vent hose through the hole in the fuel tank from the top The end of the air vent hose should extend 15 20 mm 0 59 0 79 in from the hole Do not kink the air vent hose Pass the crankcase...

Page 25: ...23 Nm 2 3 m kg 17 ft Ib T R 23 Nm 2 3 m kg 17 ft Ib 4 3 2 1 7 5 6 4 Order Job Part Q ty Remarks Removing the seat front carrier front bumper and center cover Remove the parts in the order listed 1 Sea...

Page 26: ...2 ft Ib T R 23 Nm 2 3 m kg 17 ft Ib T R 23 Nm 2 3 m kg 17 ft Ib T R 23 Nm 2 3 m kg 17 ft Ib 4 3 2 1 7 5 6 4 Order Job Part Q ty Remarks 7 Center cover 1 NOTE Install the fuel tank cap after removing t...

Page 27: ...t grill assembly and front fender Remove the parts in the order listed Seat center cover Refer to SEAT FRONT CARRIER FRONT BUMPER AND CENTER COVER 1 Main switch coupler 1 Disconnect 2 Headlight couple...

Page 28: ...er and rear fender Remove the parts in the order listed Seat center cover Refer to SEAT FRONT CARRIER FRONT BUMPER AND CENTER COVER Front grill assembly front fender Refer to FRONT GRILL ASSEMBLY AND...

Page 29: ...7 ft Ib 3 4 4 4 9 8 2 5 1 4 7 6 Order Job Part Q ty Remarks 5 Battery 1 6 Carburetor joint clamp screw 1 Loosen 7 Crankcase breather hose 1 Disconnect 8 Air filter case 1 9 Rear fender 1 For installat...

Page 30: ...G THE HEADLIGHT BEAMS 1 Adjust headlight beam vertically a Turn the adjusting screw 1 in direction a or b Direction a Headlight beam is raised Direction b Headlight beam is lowered b 1 a EBS00124 REPL...

Page 31: ...your hands away from the bulb while it is on since it will be hot Do not touch the bulb until it cools down 4 Install bulb CAUTION _ Avoid touching the glass part of the bulb Keep it free from oil oth...

Page 32: ...Sb R B Br R W B B R R R R B B G Y B G Y B Y G B Y G B Y G B R B L Br R W G Y B Br B Y L Y 1 2 3 5 6 8 7 0 A Br Sb F H G Y Br G L G W B G I K J L M N N OFF ON O Br R GRAY 4 B C L L L D G W B B Br Y E 9...

Page 33: ...R B Br L R W W W W B R L R B R W Br W R BLACK R W BLACK R Br Br G Y Y B G Y Br B GRAY Y Br GRAY B B R W L W R W L W L W L W Sb R B Br R W B B R R R R B B Y G B R B L Br R W G Y B Br B Y 1 2 3 5 6 8 7...

Page 34: ...G W R B B O G Y R W L W R W L W B B L W L W Sb R B Br R W B B R R R R B B G Y B G Y B Y G B Y G B Y G B R B L Br R W G Y B Br B Y L Y 1 2 3 5 6 8 7 0 A Br Sb F H G Y Br G L G W B G I K J L M N N OFF...

Page 35: ...Check the fuse for continuity Refer to CHECKING THE SWITCH Manual No 3FA AE1 Is the fuse OK Replace the fuse 2 Battery Check the condition of the battery Refer to BATTERY INSPECTION in chapter 3 Manua...

Page 36: ...em s wiring Refer to WIRING DIAGRAM Is the lighting system s wiring properly connected and without defects Check the condition of each of the lighting system s circuits Refer to LIGHTING SYSTEM in cha...

Page 37: ...L W B B L W L W Sb R B Br R W B B R R R R B B G Y B G Y B Y G B Y G B Y G B R B L Br R W G Y B Br B Y L Y 1 2 3 5 6 8 7 0 A Br Sb F H G Y Br G L G W B G I K J L M N N OFF ON O Br R GRAY 4 B C L L L D...

Page 38: ...minal as shown Positive tester probe pink 1 Negative tester probe ground Set the main switch to ON Push the horn switch Measure the voltage DC 12 V of pink at the horn terminal Is the voltage within s...

Page 39: ......

Page 40: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN...

Page 41: ...G B Br Br B P Br P P B B B Y B B G Br Br G L Sb Sb G L R W R W Br G L 1 A C magneto 2 Rectifier regulator 3 Main switch 4 Fuse 5 Battery 6 Starter relay 7 Starter motor 8 Starting circuit cut off rel...

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