2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 203Get this manual
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CRANKCASE
2nd step: Measure piston skirt diameter "P" with the micrometera mm (0.20 in) from the bottom edge of the pistonPiston size (standard) (P): 73.955 73.970 mm (2.9116 2.9122 in) If out o