1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 122Get this manual
INSPECTION AND REPAIR
6Measere: -Clutch spring free length Out of specification Replace spring as set
Free length (clutch spring): 47.8 mm (1.88 in)Limit: 46.5 mm (1.83 in)
7Inspect:
-Clutch housing dogs CracksPitting (edges): Moderate-s DeburrSevere-r Replace clutch housingNOTE:
Pitting on friction plate dogs of clutch housing will cause erratic operation