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

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

1. Remove:

  • Rear wheel Refer to "REAR WHEEL" on page 4-12.

2. Check:

  • Brake disc Damage/galling → Replace.

3. Measure:

Brake disc deflection Out of specification → Correct the brake disc deflection or replace the brake disc.

Refer to "CHECKING THE FRONT BRAKE DISC" on page 4-21.


4. Measure:

Brake disc thickness Measure the brake disc thickness at a few different locations.

Out of specification → Replace.

Refer to "CHECKING THE FRONT BRAKE DISC" on page 4-21.


5. Adjust:

  • Brake disc deflection Refer to "CHECKING THE FRONT BRAKE DISC" on page 4-21.

6. Install:

  • Rear wheel Refer to "REAR WHEEL" on page 4-12.
    Introduction
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    Replacing the rear brake pads
    NOTE: When replacing the brake pads, it is not necessary to disconnect the brake hose or disassemble the brake caliper. 1. Remove: Brake pads Brake pad spring NOTE: To remove the inner b ...

    Other materials:

    Adjusting the brake pedal free play
    Adjusting the brake pedal free play Brake pedal free play The brake pedal free play should measure 3.5-4.5 mm (0.14-0.18 in) as shown. Periodically check the brake pedal free play and, if necessary, have a Yamaha dealer adjust it. WARNING An incorrect brake pedal free play in ...

    Removing the piston
    1. Remove: Piston pin clips "1" Piston pin "2" Piston "3" CAUTION:Do not use a hammer to drive the piston pin out. NOTE: Before removing the piston pin clip, cover the crankcase opening with a clean rag to prevent the piston pin clip from falling in ...

    Checking the connections
    Check the leads, couplers, and connectors for stains, rust, moisture, etc. 1. Disconnect: Lead Coupler Connector 2. Check: Lead Coupler Connector Moisture → Dry with an air blower. Rust/stains → Connect and disconnect several times. 3. Check: All co ...

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