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:

    Periodic maintenance and lubrication chart
    NOTE: The annual checks must be performed every year, except if a kilometer-based maintenance, or for the UK, a mileage-based maintenance, is performed instead. From 30000 km (17500 mi), repeat the maintenance intervals starting from 6000 km (3500 mi). Items marked with an asterisk s ...

    Checking the rear brake caliper
    1. Check: Brake caliper piston "1" Rust/scratches/wear Replace the brake caliper piston. Brake caliper cylinder "2" Scratches/wear Replace the brake caliper assembly. Brake caliper body "3" Cracks/damage   Replace the brake caliper assembly. Brake fluid deli ...

    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 ...

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