2008 Arctic Cat ThunderCat ATV Service Manual, Page 42Get this manual
NOTE: If the existing rings will not be replaced with new ones, note the location of each ring for proper installationWhen installing new rings, install as complete set only CleaningInspecting Piston Rings 1Take an old piston ring and snap it into two pieces; then grind the end of the old ring to 45 angle and to sharp edge2Using the sharpened ring as tool, clean carbon from the ring-groovesBe sure to position the ring with its tapered side up
ATV-1070
! CAUTION
Improper cleaning of the ring-grooves by the use of the wrong type of ring-groove cleaner will result in severe damage to the piston
2Insert an inside dial indicator into the piston-pin boreThe diameter must not exceed specificationsTake two measurements to ensure accuracy
Measuring 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 specificationsATV-1069