2006 Arctic Cat Y-6/Y-12 50cc and 90cc Service Manual, Page 47Get this manual
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NOTE: Make sure the rings rotate freely and the ring gaps are separated by 120 as illustrated
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20Install one of the piston pin circlips into one side of the piston with the opening directed toward the skirt or the domeNOTE: When installing the circlips, compress them just enough to installDo not over-compress the circlips
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22Apply engine oil to the piston and the cylinder wallDSC02253