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:

    Checking the fuel line
    1. Remove: Left side panel Refer to "GENERAL CHASSIS" on page 4-1. 2. Lift the fuel tank. (Do not disconnect the fuel hose, drain hose 3. Check: Fuel hose "1" Cracks/damage → Replace. Loose connection Connect properly. 4. Install: Fuel tank Refer to "FUEL TANK" on pa ...

    Cable routing
    Front brake light switch lead Right handlebar switch lead Throttle cable Main switch Clutch cable Clutch switch lead Left handlebar switch lead Sub-wire harness Horn Speed sensor lead Front brake hose Main switch lead Left headlight assembly lead Right headlight asse ...

    Installing the front fork legs
    The following procedure applies to both of the front fork legs. 1. Install: Front fork leg Temporarily tighten the upper and lower bracket pinch bolts. NOTE: Make sure the inner tube end position "a" is 24.5 mm (0.96 in) from the top of the upper bracket. 2. Tighten: Lower br ...

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