2008 Arctic Cat ATVs factory service and repair manual, Page 219Get this manual
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 2Remove each ring by working it toward the dome of the piston while rotating it out of the grooveiNOTE: 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
Cleaningflnspecting 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
2Insert an inside dial indicator into the piston-pin boreThe diameter must not exceed specificationsTake two measurements to ensure accuracy
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