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:
Checking the fuel pressure
1. Check:
Pressure regulator operation
a. Remove the fuel hose connector cover "1"
and disconnect the fuel hose "2" from the fuel
pump.
CAUTION:Although the fuel has been removed from
the fuel tank, be careful when removing the
fuel hose, since there may be fuel remaining
i ...
Checking and charging the battery
WARNINGBatteries generate explosive hydrogen gas
and contain electrolyte which is made of poisonous
and highly caustic sulfuric acid.
Therefore, always follow these preventive
measures:
Wear protective eye gear when handling or
working near batteries.
Charge batt ...
Removing the cylinder head
1. Align:
"I" mark "a" on the generator rotor
(with the stationary pointer "b" on the generator
cover)
a. Turn the crankshaft counterclockwise.
b. When the piston is at TDC on the compression
stroke, align the "I" mark "c" on the camshaft
sprocket with the mark "d" on the
cylinder h ...