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

Yamaha YZF-R125 Service Manual / Periodic checks and adjustments / Chassis / 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:

Troubleshooting
Any of the following fail to light: turn signal lights, brake light or indicator lights. The horn fails to sound. The fuel gauge fails to operate. The speedometer fails to operate. NOTE: Before troubleshooting, remove the following part(s): 1. Seats 2. Fuel tank 3. Left upper ...

Indicator and warning lights
Indicator and warning lights Neutral indicator light"" Turn signal indicator light"" High beam indicator light"" Engine trouble warning light"" Coolant temperature warning light"" Turn signal indicator light"" This indicator light flashes when the turn signal switch is pushed t ...

Installing the clutch
1. Install: Conical spring washer "1" NOTE: Install the conical spring washer as shown in the illustration. 2. Install: Clutch housing Thrust washer "1" NOTE: Be sure to install the thrust washer so that its sharp edge "a" is facing away from the clutch boss. 3. Instal ...