Yamaha YZF-R125 Service Manual: Circuit diagram

Circuit diagram


4. Main fuse

5. Main switch

9. Battery

25.ECU (engine control unit)

36.License plate light

37.Tail/brake light

44.Headlight relay

46.Pass switch

47.Dimmer switch

51.Headlight (low beam)

52.Auxiliary light

54.Headlight (high beam)

58.Meter light

60.High beam indicator light

64.Ignition fuse

65.Headlight fuse

66.Signaling system fuse

    Lighting system
    ...

    Troubleshooting
    Any of the following fail to light: headlight, high beam indicator light, taillight, license plate light, auxiliary light or meter light. NOTE: Before troubleshooting, remove the following par ...

    Other materials:

    Installing the rear wheel (disc)
    1. Install: Rear brake disc NOTE: Tighten the brake disc bolts in stages and in a crisscross pattern. 2. Check: Rear brake disc Refer to "CHECKING THE REAR BRAKE DISC" on page 4-33. 3. Lubricate: Rear wheel axle Contact surface of rear wheel hub and rear wheel Whee ...

    Overheating
    Engine 1. Clogged coolant passages Cylinder head and piston Heavy carbon buildup 2. Engine oil Incorrect oil level Incorrect oil viscosity Inferior oil quality Cooling system 1. Coolant Low coolant level 2. Radiator Damaged or leaking radiator Faulty radiator cap ...

    Checking the shift drum assembly
    1. Check: Shift drum groove Damage/scratches/wear Replace the shift drum assembly. Shift drum segment "1" Damage/wear  Replace the shift drum assembly. Shift drum bearing "2" Damage/pitting Replace the shift drum assembly. ...

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