2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 185Get this manual

2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 185

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VALVES AND VALVE SPRINGS 4 Install: Valve cotters 1
5 To secure the valve cotters onto the valve stem, lightly tap the valve tip with soft-face hammer
CAUTION:
Hitting the valve tip