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:

Disassembling the front fork legs
The following procedure applies to both of the front fork legs. 1. Remove: Rubber cap Clip "1" Front fork cap "2" (with O-ring) Fork spring NOTE: Push the front fork cap in the direction of the arrow shown in the illustration to remove the clip. 2. Drain: Fork oil NOTE ...

Checking the coolant temperature sensor
1. Remove: Coolant temperature sensor WARNING Handle the coolant temperature sensor with special care. Never subject the coolant temperature sensor to strong shocks. If the coolant temperature sensor is dropped, replace it. 2. Check: Coolant temper ...

Identification numbers
Record the key identification number, vehicle identification number and model label information in the spaces provided below for assistance when ordering spare parts from a Yamaha dealer or for reference in case the vehicle is stolen. KEY IDENTIFICATION NUMBER: VEHICLE IDENTIFICATION ...