Yamaha YZF-R125 Service Manual: Checking the rear brake caliper

Yamaha YZF-R125 Service Manual / Chassis / Rear brake / Checking the rear brake caliper

Checking the rear brake caliper


1. Check:

  • Brake caliper piston "1" Rust/scratches/wear Replace the
    brake caliper piston.
  • Brake caliper cylinder "2" Scratches/wear Replace the
    brake caliper assembly.
  • Brake caliper body "3" Cracks/damage   Replace the
    brake caliper assembly.
  • Brake fluid delivery passages (brake caliper body)Obstruction
    Blow out with compressed air.

    Obstruction Blow out with compressed air.


WARNING

Whenever a brake caliper is disassembled, replace the brake caliper piston dust seals and piston seals.

2. Check:

  • Brake caliper bracket Cracks/damage  Replace.

    Disassembling the rear brake caliper
    1. Remove: Brake caliper piston "1" Brake caliper piston dust seal "2" Brake caliper piston seal "3" a. Blow compressed air into the brake hose joint opening "a" to force out the pisto ...

    Assembling the rear brake caliper
    WARNING Before installation, all internal brake components should be cleaned and lubricated with clean or new brake fluid. Never use solvents on internal brake components as ...

    Other materials:

    Troubleshooting
    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: Before troubleshooting, remove the following part(s): 1. Seats 2. Fuel tank 3. Left upper ...

    Checking the water pump
    1. Check: Water pump housing cover Water pump housing Cracks/damage Replace. Impeller shaft Cracks/damage/wear Replace. Bearing Rough movement Replace. Radiator outlet hose Cracks/damage Replace. ...

    Checking the fid (fast idle solenoid)
    1. Disconnect: FID (fast idle solenoid) coupler 2. Check: FID (fast idle solenoid) resistance a. Disconnect the FID (fast idle solenoid) coupler from the FID. b. Connect the pocket tester ( × 10) to the terminals of the FID (fast idle solenoid). Positive tester probe ...

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