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

1. Check:

  • Brake pedal position (distance "a" from the center of the rider footrest to the center of the brake pedal) Out of specification Adjust.

Adjusting the rear disc brake


2. Adjust:

  • Brake pedal position

a. Loosen the locknut "1".

b. Remove the cotter pin "2", washer "3", and pin "4".

c. Turn the adjusting nut "5" in direction "a" or "b" until the specified brake pedal position is obtained.


Adjusting the rear disc brake


d. Tighten the locknut "1" to specification.


WARNING

A soft or spongy feeling in the brake pedal can indicate the presence of air in the brake system. Before the vehicle is operated, the air must be removed by bleeding the brake system. Air in the brake system will considerably reduce braking performance.

CAUTION:

After adjusting the brake pedal position, make sure there is no brake drag.

e. Install the pin, washer, and cotter pin.

WARNING

Always use a new cotter pin.

    Chassis
    ...

    Checking the brake fluid level
    1. Stand the vehicle on a level surface. NOTE: Place the vehicle on a suitable stand. Make sure the vehicle is upright. 2. Check: Brake fluid level Below the minimum level mark "a" → ...

    Other materials:

    Installing the drive chain
    1. Lubricate: Drive chain Master link 2. Install: Drive sprocket Drive sprocket retainer bolts 3. Install: Master link O-rings Master link plate Master link clip "1" CAUTION: The closed end of the master link clip must face in the direction of drive ch ...

    Checking the stator coil
    1. Disconnect: Stator coil coupler (from the wire harness) 2. Check: Stator coil resistance Out of specification → Replace the crankshaft position sensor/stator assembly. a. Connect the pocket tester ( × 1) to the stator coil coupler as shown. b. Measure the sta ...

    Checking the clutch plates
    The following procedure applies to all of the clutch plates. 1. Check: Clutch plate Damage Replace the clutch plates as a set. 2. Measure: Clutch plate warpage (with a surface plate and thickness gauge "1") Out of specification Replace the clutch plates as a set. ...

    2019 Copyright www.yam-r125.net |