2004 650 Twin Arctic Cat ATV Service Manual, Page 50Get this manual

2004 650 Twin Arctic Cat ATV Service Manual, Page 50

CleaningInspecting Piston Rings 1Take an old piston ring and snap it into two pieces; then grind the end of the old ring
piston-ring end gapAcceptable ring end gap must be within specificationsMeasuring Piston Skirt Cylinder Clearance ATV-1069
1Measure the cylinder front to back in six places 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 2Measure the corresponding piston diameter at 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 specificationsInstalling
Piston Rings 1Install thin oil ring (3), ring expander (4), and thin oil ring (3) in the bottom groove of the pistonStagger