2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 328Get this manual

2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 328

Measuring Piston Pin (Outside Diameter) and Piston-Pin Bore 1Measure the piston pin outside diameter at each end and in the
the cylinder front to back in six places CleaningInspecting Cylinder Head 2Measure the corresponding piston diameter at a
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 in CAUTION The cylinder head studs
must be removed for this procedure Installing Piston Rings 1Install thin oil ring (3), ring expander (4), and thin oil ring
(3) in the bottom groove of the pistonStagger the end gaps of the upper and lower thin oil rings according to the illustration
NOTE: Note the direction of the exhaust side of the piston (5) for correct ring end gap orientation 1Using non-metallic carbon
removal tool, remove any carbon buildup from the combustion chamber being careful not to nick, scrape, or damage the combustion