2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 293Get this manual

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MAINTENANCE SPECIFICATIONS Model Valve dimensions: Valve head diameter Intake Exhaust Valve face width Intake Exhaust
0.9 1.1 mm (0.035 0.043 in) 0.9 1.1 mm (0.035 0.043 in)

0.5 0.9

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