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

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

1. Remove:

  • Brake caliper piston "1"
  • Brake caliper piston dust seal "2"
  • Brake caliper piston seal "3"

Disassembling the rear brake caliper


a. Blow compressed air into the brake hose joint opening "a" to force out the piston from the brake caliper.

WARNING

  • Cover the brake caliper piston with a rag.

    Be careful not to get injured when the piston is expelled from the brake caliper.

  • Never try to pry out the brake caliper piston.

Disassembling the rear brake caliper


b. Remove the brake caliper piston seal and dust seal.

    Removing the rear brake caliper
    NOTE: Before disassembling the brake caliper, drain the brake fluid from the entire brake system. 1. Remove: Union bolt "1" Copper washers "2" Brake hose "3" NOTE: Put the end of th ...

    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 ...

    Other materials:

    Checking the camshaft sprocket and timing chain guide
    1. Check: Camshaft sprocket More than 1/4 tooth wear "a" Replace the camshaft sprocket, timing chain and crankshaft as a set. a. 1/4 tooth b. Correct 1. Timing chain roller 2. Camshaft sprocket 2. Check: Timing chain guide (exhaust side) Damage/wear Replace. ...

    Checking the cooling system
    1. Remove: Side covers Upper side cowlings Refer to "GENERAL CHASSIS" on page 4-1. 2. Check: Radiator "1" Radiator inlet hose "2" Radiator outlet hose "3" Coolant reservoir hose "4" Water pump breather hose "5" Cracks/damage → Replace. Refer to "RADIATOR" on page 6-1 ...

    Replacing the front brake pads
    NOTE: When replacing the brake pads, it is not necessary to disconnect the brake hose or disassemble the brake caliper. 1. Measure: Brake pad wear limit "a" Out of specification Replace the brake pads as a set. 2. Install: Brake pad support Brake pad spring Brake pads ...

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