1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 278Get this manual
FRONT DRIVING MECHANISM (TRX300FW) INSPECTION GEAR AND SHAFT Check the gear and shaft for wear or damage
BEARING Turn the inner race of each bearing with your fingerThe bearing should turn smoothly and quietlyAlso check that the bearing outer race fits tightly in the case or coverRemove and discard the bearings if the races do not turn smoothly, quietly or if they fit loosely in the case or cover