2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 270Get this manual

2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 270

CleaningInspecting Piston Rings 1Take an old piston ring and snap it into two pieces; then grind the end of the old ring
gauge, measure each piston-ring Measuring Piston Skirt Cylinder Clearance 1Measure the cylinder front to back in six places
end gapAcceptable ring end gap must be within arange of 0.10-0.25 mm (0.0039-0.0098 in both nngs 2Measure the corresponding
piston diameter at a Measuring Piston Pin (Outside Diameter) and Piston-Pin Bore point 15 mm (0.6 in above the piston skirt
at right angle to the piston-pin boreSubtract this measurement from the measurement in step 1The difference (clearance) must
be within range of 0.030-0.040 mm (0.0011-0.0015 inInstalling Piston Rings 1Measure the piston pin outside diameter at each
end and in the centerIf measurement is less than 22.98 mm (0.905 in, the piston pin must be replaced 1Install thin oil ring