2006 Arctic Cat Y-6/Y-12 50cc and 90cc Service Manual, Page 50Get this manual
32Depress the ratchet and retract the rod; then install the chain tensioner body to the cylinderTighten the two cap screws to specifications DSC02285
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30Install the four copper washers, four flange nuts, and two cap screwsTighten the nuts to specifications; then tighten the cap screws to specifications