Yamaha YZF-R125 Service Manual: Checking the starter clutch

1. Check:

• Starter clutch rollers "1"
• Starter clutch spring caps "2"
• Starter clutch springs "3"

Damage/wear Replace the starter
clutch assembly.

2. Check:

• Starter clutch idle gear
• Starter clutch gear Burrs/chips/roughness/wear Replace the defective part(s).

3. Check:

• Starter clutch gear contacting surfaces Damage/pitting/wear Replace the starter clutch gear.

4. Check:

• Starter clutch operation

a. Install the starter clutch gear "1" onto the starter clutch and hold the generator rotor.

b. When turning the starter clutch gear clockwise "A", the starter clutch and the starter clutch gear should engage, otherwise the starter clutch is faulty and must be replaced.

c. When turning the starter clutch gear counterclockwise "B", it should turn freely, otherwise the starter clutch is faulty and must be replaced.