2001 Arctic Cat ATVs factory service and repair manual, Page 216Get this manual
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2 Using feeler gauge, measure each piston-ring end gapAcceptable ring end gap must be maximum 0.70 mm (0.028 in 1st ring and 1.0 mm (0.039 in 2nd ring for the 250300 cc, maximum 0.50 mm (0.020 in both