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:
Troubleshooting method
The engine operation is not normal and the
engine trouble warning light comes on.
1. Check:
Fault code number
a. Check the fault code number displayed on
the FI diagnostic tool.
b. Identify the faulty system with the fault code.
Refer to "Self-Diagnostic Function table".
c. Identi ...
Installing the front wheel (disc)
1. Install:
Front brake disc
NOTE:
Be sure to install the front brake disc with the
arrow mark "a" on the disc facing out.
Tighten the brake disc bolts in stages and in a
crisscross pattern.
2. Check:
Front brake disc
Refer to "CHECKING THE FRONT BRAKE
DISC" on page 4 ...
Circuit diagram
4. Main fuse
5. Main switch
9. Battery
25.ECU (engine control unit)
36.License plate light
37.Tail/brake light
44.Headlight relay
46.Pass switch
47.Dimmer switch
51.Headlight (low beam)
52.Auxiliary light
54.Headlight (high beam)
58.Meter light
60.High beam indicator light
64.Ignit ...