1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 126Get this manual
INSPECTION AND REPAIR
BEARINGS AND OIL SEALS 1Inspect:Bearing Clean and lubricate, then rotate inner race with fingerRouqhness- Replace bearing (see Removal)2Inspect: -Oil seals DarnaqeWear- Replace (see Removal)