1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 264Get this manual
OVERHEATINGFAULTY BRAKE
PROBABLE CAUSE CLUTCH DRAGGING
Clutch.Warped pressure plate Unevenly tensioned clutch springs Match marks not aligned Loose clutch boss nut Burnt primary driven gear bushing Bent clutch plate Swollen friction plate Broken clutch boss Transmission Oil-,CHi9h oil level .Improper quality (High viscosity) Deterioration
OVERHEATING