Yamaha YZF-R125 Service Manual: Circuit diagram

Circuit diagram


4. Main fuse

5. Main switch

9. Battery

14.Neutral switch

25.ECU (engine control unit)

31.Fuel sender

34.Rear brake light switch

35.Front brake light switch

37.Tail/brake light

38.Rear right turn signal light

39.Rear left turn signal light

40.Front right turn signal light

41.Front left turn signal light

42.Turn signal relay

43.Horn

48.Horn switch

49.Turn signal switch

56.Multi-function meter

57.Tachometer

61.Turn signal indicator light

62.Neutral indicator light

64.Ignition fuse

66.Signaling system fuse

67.Speed sensor

    Signaling system
    ...

    Troubleshooting
    Any of the following fail to light: turn signal lights, brake light or indicator lights. The horn fails to sound. The fuel gauge fails to operate. The speedometer fails to operate. NOTE ...

    Other materials:

    Checking and replacing the rear wheel sprocket
    1. Check: Rear wheel sprocket More than 1/4 tooth "a" wear Replace the rear wheel sprocket. Bent teeth Replace the rear wheel sprocket. b. Correct 1. Drive chain roller 2. Rear wheel sprocket 2. Replace: Rear wheel sprocket a. Remove the self-locking nuts and the ...

    Checking the rear brake master cylinder
    1. Check: Brake master cylinder Damage/scratches/wear Replace. Brake fluid delivery passages (brake master cylinder body) Obstruction Blow out with compressed air. 2. Check: Brake master cylinder kit Damage/scratches/wear Replace. 3. Check: Brake fluid reservoir Cracks/ ...

    Checking the radiator fan motor
    1. Check: Radiator fan motor Faulty/rough movement → Replace. a. Disconnect the radiator fan motor coupler from the wire harness. b. Connect the battery (DC 12 V) as shown. Positive tester probe → blue "1" Negative tester probe → black "2" c. Measure ...

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