Yamaha YZF-R125 Service Manual: Checking and replacing the rear wheel sprocket

Yamaha YZF-R125 Service Manual / Chassis / Rear wheel / 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.

Checking and replacing 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.

Checking and replacing the rear wheel sprocket


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:

    Replacing the fuses
    Replacing the fuses Fuse box Spare fuse Headlight fuse Signaling system fuse Ignition fuse Radiator fan fuse Main fuse The fuse box is located under the rider seat. If a fuse is blown, replace it as follows. Turn the key to "OFF" and turn off the electrical circuit i ...

    Checking the front brake hose
    1. Check: Brake hose "1" Cracks/damage/wear  Replace. 2. Check: Brake hose holder "2" Loose connection Tighten the holder bolt. 3. Hold the vehicle upright and apply the front brake several times. 4. Check: Brake hose Brake fluid leakage Replace the da ...

    Checking the front fork
    1. Stand the vehicle on a level surface. WARNINGSecurely support the vehicle so that there is no danger of it falling over. 2. Check: Inner tube Damage/scratches Replace. Oil seal Oil leakage Replace. 3. Hold the vehicle upright and apply the front brake. 4. Che ...

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