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

Yamaha YZF-R125 Service Manual / Chassis / Front brake / Checking the front brake caliper

Checking the front brake caliper


1. Check:

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

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

Checking the front brake caliper


2. Check:

  • Brake caliper bracket Cracks/damage Replace.

    Removing the front brake caliper
    NOTE: Before disassembling the brake caliper, drain the brake fluid from the entire brake system. 1. Remove: Brake hose union bolt "1" Copper washers "2" Brake hose "3" NOTE: Put the en ...

    Assembling the front 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:

    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 piston from the brake caliper. WARNING Cover the brake caliper piston with a rag. Be careful no ...

    Troubleshooting
    Although Yamaha motorcycles receive a thorough inspection before shipment from the factory, trouble may occur during operation. Any problem in the fuel, compression, or ignition systems, for example, can cause poor starting and loss of power. The following troubleshooting charts repre ...

    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 M ...

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