Yamaha YZF-R125 Service Manual: Faulty front fork legs

Leaking oil

- Bent, damaged or rusty inner tube

- Cracked or damaged outer tube

- Improperly installed oil seal

- Damaged oil seal lip

- Incorrect oil level (high)

- Loose damper rod assembly bolt

- Damaged damper rod assembly bolt copper washer

- Cracked or damaged front fork cap O-ring

Malfunction

- Bent or damaged inner tube

- Bent or damaged outer tube

- Damaged fork spring

- Worn or damaged outer tube bushing

- Bent or damaged damper rod

- Incorrect oil viscosity

- Incorrect oil level

    Poor braking performance
    - Worn brake pad - Worn brake disc - Air in hydraulic brake system - Leaking brake fluid - Faulty brake caliper kit - Faulty brake caliper seal - Loose union bolt - Damaged brake hose - Oil or ...

    Unstable handling
    Handlebars - Bent or improperly installed right handlebar - Bent or improperly installed left handlebar 1. Steering head components - Improperly installed upper bracket - Improperly installed low ...

    Other materials:

    Troubleshooting method
    The engine operation is not normal and the engine trouble warning light comes on. 1. Check: Fault code number a. Check the fault code number displayed on the FI diagnostic tool. b. Identify the faulty system with the fault code. Refer to "Self-Diagnostic Function table". c. Identi ...

    Checking and lubricating the brake and shift pedals
    Brake pedal Brake pedal Shift pedal Shift pedal The operation of the brake and shift pedals should be checked before each ride, and the pedal pivots should be lubricated if necessary. Recommended lubricant:Lithium-soap-based grease ...

    Operation and important riding points
    Read the Owner's Manual carefully to become familiar with all controls. If there is a control or function you do not understand, ask your Yamaha dealer. WARNING Failure to familiarize yourself with the controls can lead to loss of control, which could cause an accident or injury. TIP ...

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