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:

    Troubleshooting details
    This section describes the measures per fault code number displayed on the FI diagnostic tool. Check and service the items or components that are the probable cause of the malfunction following the order given. After the check and service of the malfunctioning part have been completed, re ...

    Specifications
    Dimensions: Overall length: 2015 mm (79.3 in) Overall width: 660 mm (26.0 in) Overall height: 1065 mm (41.9 in) Seat height: 818 mm (32.2 in) Wheelbase: 1355 mm (53.3 in) Ground clearance: 155 mm (6.10 in) Minimum turning radius: 3100 mm (122.0 in) Weight: With oil and fuel: 138.0 k ...

    Checking the valve springs
    The following procedure applies to all of the valve springs. 1. Measure: Valve spring free length "a" Out of specification Replace the valve spring. 2. Measure: Compressed valve spring force "a" Out of specification Replace the valve spring. b. Installed length 3. ...

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