Yamaha YZF-R125 Service Manual: Troubleshooting

If the fuel pump fails to operate.

NOTE:

  • Before troubleshooting, remove the following part(s):

1. Rider seat

2. Fuel tank

Troubleshooting


    Circuit diagram
    4. Main fuse 5. Main switch 9. Battery 17.Engine stop switch 25.ECU (engine control unit) 30.Fuel pump 64.Ignition fuse ...

    Electrical components
    1. Main switch 2. Clutch switch 3. Front brake light switch 4. Ignition coil 5. Throttle body sensor assembly (intake air pressure sensor, intake air temperature sensor, throttle position se ...

    Other materials:

    Installing the valves
    The following procedure applies to all of the valves and related components. 1. Deburr: Valve stem end (with an oil stone) 2. Lubricate: Valve stem "1" Valve stem seal "2" (with the recommended lubricant) 3. Install: Lower spring seat "1" Valve stem seal "2" V ...

    Checking the front and rear brake pads
    The front and rear brake pads must be checked for wear at the intervals specified in the periodic maintenance and lubrication chart. Front brake pads Remove the front brake caliper by removing the bolts. Bolt Brake caliper Lining thickness Check each front br ...

    Catalytic converters
    This vehicle is equipped with catalytic converters in the exhaust system. WARNING The exhaust system is hot after operation. To prevent a fire hazard or burns: Do not park the vehicle near possible fire hazards such as grass or other materials that easily burn. Park the vehic ...

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