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


48.Horn switch

49.Turn signal switch

56.Multi-function meter


61.Turn signal indicator light

62.Neutral indicator light

64.Ignition fuse

66.Signaling system fuse

67.Speed sensor

    Signaling system

    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 the clutch springs
    The following procedure applies to all of the clutch springs. 1. Check: Clutch spring Damage Replace the clutch springs as a set. 2. Measure: Clutch spring free length "a" Out of specification Replace the clutch springs as a set. ...

    Checking the rectifier/regulator
    1. Check: Rectifier/regulator output voltage Out of specification → Replace the rectifier/ regulator. a. Set the engine tachometer to the spark plug lead. b. Connect the pocket tester (DC 20 V) to the rectifier/regulator coupler as shown. Positive tester probe red "1" Negat ...

    Adjusting the exhaust gas volume
    NOTE: Be sure to set the CO density level to standard, and then adjust the exhaust gas volume. 1. Remove: Rider seat Refer to "GENERAL CHASSIS" on page 4-1. 2. Set the main switch to "OFF". 3. Disconnect: Self-diagnosis signal connector "1" 4. Connect: FI diagnostic tool "2 ...

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