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

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

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INSPECTION AND REPAIR
Compressed force (valve spring): Inner spring 10.7 -12.3 kg at 33.6 mm (23.59-27.12 Ib at 1.323 in) Outer spring 24.025.6 kg at 36.6 mm (52.9156.44 Ib at 1.441 in)