Yamaha YZF-R125 Service Manual: Checking and replacing the rear wheel sprocket
1. Check:
- Rear wheel sprocket
More than 1/4 tooth "a" wear
Replace the rear wheel sprocket.Bent teeth
Replace the rear
wheel sprocket.
b. Correct
1. Drive chain roller
2. Rear wheel sprocket
2. Replace:
- Rear wheel sprocket
a. Remove the self-locking nuts and the rear wheel sprocket.
b. Clean the rear wheel drive hub with a clean cloth, especially the surfaces that contact the sprocket.
c. Install the new rear wheel sprocket.
NOTE:
Tighten the self-locking nuts in stages and in a crisscross pattern.
Assembling the rear wheel
1. Install:
- Wheel bearings
- Oil seals
Refer to "ASSEMBLING THE FRONT WHEEL" on page 4-9.
Checking the rear wheel
1. Check:
Rear wheel axle
Rear wheel
Wheel bearings
Oil seals
Refer to "CHECKING THE FRONT WHEEL"
on page 4-8.
2. Check:
Tire
Rear wheel
Damage/wear → Replace.
Refer ...
Adjusting the rear wheel static balance
NOTE:
After replacing the tire, wheel or both, the rear
wheel static balance should be adjusted.
Adjust the rear wheel static balance with the
brake disc and rear wheel drive hub installed.
...
Other materials:
Removing the rear wheel (disc)
1. Stand the vehicle on a level surface.
WARNINGSecurely support the vehicle
so that there is
no danger of it falling over.
2. Elevate:
Rear wheel
NOTE:
Place the vehicle on a suitable stand so that the
rear wheel is elevated.
3. Remove:
Rear brake caliper
NOTE: ...
Circuit diagram
4. Main fuse
5. Main switch
9. Battery
14.Neutral switch
25.ECU (engine control unit)
31.Fuel sender
34.Rear brake light switch
35.Front brake light switch
37.Tail/brake light
38.Rear right turn signal light
39.Rear left turn signal light
40.Front right turn signal light
41.Front lef ...
Checking the spark plug cap
1. Check:
Spark plug cap resistance
Out of specification Replace.
a. Remove the spark plug cap from the spark
plug lead.
b. Connect the pocket tester ( × 1k)
to the
spark plug cap as shown.
c. Measure the spark plug cap resistance. ...