1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 114Get this manual

INSPECTION AND REPAIR

VALVE SPRING 1Measure:Free length (valve spring) Out of specification- ReplaceFree length (valve spring): Inner spring 39.9 mm (1.57 in) Outer spring 43.27 mm (1.70 in)
2Measure: -Compressed force (valve spring) Out of specification- Replace
Installed length

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives