2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 211Get this manual

2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 211

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CRANKCASE
15 Select: Big end bearings (P1 P4) NOTE: The numbers stamped into the crankshaft web and the numbers on the connecting rods are used to determine the replacement big end bearing sizes