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.
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.
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:
Starting circuit cut-off system operation
If the engine stop switch is set to "
" and the main switch is set to
"ON" (both switches are closed), the
starter motor can only operate if at least one of the following conditions is
met:
The transmission is in neutral (the neutral switch is closed).
The clutch lever is pulled to the ...
Checking the diode
1. Check:
Diode
Out of specification Replace.
NOTE:
The pocket tester or the analog pocket tester
readings are shown in the following table.
a. Disconnect the diode from the wire harness.
b. Connect the pocket tester ( × 1)
to the diode
terminals as shown.
c. Check the diod ...
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 ...