2008 Arctic Cat 366 ATV Service Manual, Page 44Get this manual
ATV-1069
ATV-1085B
Measuring Piston Skirt Cylinder Clearance 1Measure the cylinder front to back in six places
2Install the compression rings (1 and 2) so the letter(s) on the top surface of each ring faces the dome of the pistonRotate the rings until the ring end gaps are on directly opposite sides of the piston according to the illustrationNOTE: The chrome (silver) ring should be installed in the top position
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 ring expander (4) in the bottom groove of the piston; then install the thin oil rings (3) over the expander making sure the expander ends do not overlapStagger the end gaps of the upper and lower thin oil rings according to the illustrationNOTE: Note the direction of the exhaust side of the piston (5) for correct ring end gap orientation