2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 178Get this manual
PICKUP COIL ROTOR AND STARTER CLUTCH
CHECKING THE STARTER CLUTCH 1Check: Starter clutch rollers DamagewearReplace the starter clutch
2Check: Starter idle gear Starter wheel gear Starter clutch gear BurrschipsroughnesswearReplace the defective part(s)3Check: Starter clutch gear's contacting surfaces DamagepittingwearReplace the starter clutch gear4Check: Starter clutch operation aInstall the starter wheel gear onto the starter clutch and hold the starter clutchbWhen turning the starter wheel gear clockwisethe starter clutch and the starter wheel gear should engage, otherwise the starter clutch is faulty and must be replacedcWhen turning the starter wheel gear counterclockwiseit should turn freely, otherwise the starter clutch is faulty and must be replaced5Check: Shaft Damagefatiguewear defective part(s)