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:
Checking the switches
1. Clutch switch
2. Main switch
3. Front brake light switch
4. Sidestand switch
5. Rear brake light switch
6. Neutral switch
7. Turn signal switch
8. Horn switch
9. Dimmer switch
10.Pass switch
11.Engine stop switch
12.Start switch
Check each switch for continuity with the pocket tes ...
Chain drive
Removing the drive chain
1. Stand the vehicle on a level surface.
WARNINGSecurely support the vehicle so that there
is
no danger of it falling over.
NOTE:
Place the vehicle on a suitable stand so that the
rear wheel is elevated. ...
Aftermarket Parts, Accessories, and Modifications
While you may find aftermarket products
similar in design and quality to
genuine Yamaha accessories, recognize
that some aftermarket accessories
or modifications are not suitable because
of potential safety hazards to you
or others. Installing aftermarket products
or having other modif ...