2010 Arctic Cat Prowler XT/XTX/XTZ ATV Service Manual, Page 43Get this manual
6Inspect the perimeter of each piston for signs of excessive "blowby Excessive "blowby" indicates worn piston rings or an out-of-round cylinderMeasuring Piston-Ring End Gap (Installed) 1Place each compression ring in the wear portion of the cylinderUse the piston to position each ring squarely in the cylinder2Using feeler gauge, measure each piston-ring end gapAcceptable ring end gap must be within specificationsCC132D
PISTON ASSEMBLY
NOTE: Whenever piston or pin is out of tolerance, it must be replaced
Removing Piston Rings 1Starting with the top ring, slide one end of the ring out of the ring-groove2Remove each ring by working it toward the dome of the piston while rotating it out of the grooveCC280D
Measuring Piston Pin (Outside Diameter) and Piston-Pin Bore 1Measure the piston pin outside diameter at each end and in the centerIf measurement is not within specifications, the piston pin must be replaced