Yamaha YZF-R125 Service Manual: Replacing the front brake pads

Yamaha YZF-R125 Service Manual / Chassis / Front brake / 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

NOTE:

Always install new brake pads, a new brake pad spring and a new brake pad support as a set.

a. Connect a clear plastic hose "1" tightly to the bleed screw "2". Put the other end of the hose into an open container.

Replacing the front brake pads


b. Loosen the bleed screw and push the brake caliper pistons into the brake caliper with your fingers.

c. Tighten the bleed screw.


d. Install new brake pad support, a new brake pad spring and new brake pads.

NOTE:

The arrow mark "a" on the brake pad spring must point in the direction of disc rotation.

Replacing the front brake pads


3. Install:

  • Brake pad pin
  • Brake pad clips
  • Front brake caliper

4. Check:

  • Brake fluid level Below the minimum level mark "a" → Add the recommended brake fluid to the proper level.

    Refer to "CHECKING THE BRAKE FLUID LEVEL" on page 3-18.

Replacing the front brake pads


5. Check:

  • Brake lever operation Soft or spongy feeling Bleed
    the brake system.

    Refer to "BLEEDING THE HYDRAULIC BRAKE SYSTEM" on page 3-20.

    Checking the front brake disc
    1. Remove: Front wheel Refer to "FRONT WHEEL" on page 4-6. 2. Check: Brake disc Damage/galling Replace. 3. Measure: Brake disc deflection Out of specification Correct the b ...

    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 ...

    Other materials:

    Checking and replacing the rear wheel sprocket
    1. Check: Rear wheel sprocket More than 1/4 tooth "a" wear Replace the rear wheel sprocket. Bent teeth Replace the rear wheel sprocket. b. Correct 1. Drive chain roller 2. Rear wheel sprocket 2. Replace: Rear wheel sprocket a. Remove the self-locking nuts and the ...

    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 ...

    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 the brake hose into a container and pump out the brake fluid carefully. ...

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