2008 Yamaha Snowmobiles FX NYTRO Factory Service Manual, Page 208Get this manual

2008 Yamaha Snowmobiles FX NYTRO Factory Service Manual, Page 208

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CAMSHAFTS b a

Tighten the camshaft cap bolts in stages and in crisscross pattern, working from the inner caps out
CAUTION:
Lubricate the camshaft cap bolts with the engine oil