Yamaha YZF-R125 Service Manual: 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 part(s):

1. Seats

2. Fuel tank

Troubleshooting


Troubleshooting


    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) ...

    Signaling system
    ...

    Other materials:

    Installing the generator
    1. Install: Woodruff key Generator rotor Washer Generator rotor nut NOTE: Clean the tapered portion of the crankshaft and the generator rotor hub. When installing the generator rotor, make sure the woodruff key is properly sealed in the keyway of the crankshaft. 2. Tighte ...

    Disassembling the front wheel
    1. Remove: Oil seal Wheel bearings a. Clean the surface of the front wheel hub. b. Remove the oil seal "1" with a flat-head screwdriver. NOTE: To prevent damaging the wheel, place a rag "2" between the screwdriver and the wheel surface. c. Remove the wheel bearings "3" with a ge ...

    Checking the relays
    Check each switch for continuity with the pocket tester. If the continuity reading is incorrect, replace the relay. 1. Disconnect the relay from the wire harness. 2. Connect the pocket tester ( × 1) and battery (12 V) to the relay terminal as shown. Check the relay operation. Out ...

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