2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 76Get this manual

2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 76

#1 Compression Ring End Gap #3 Thin #3 Thin Oil Ring Oil Ring 3Place the cylinder head on the surface plate covered with
opposite sides of the piston (see illustration) Measuring Cylinder Head Distortion 726-306A CAUTION 1Remove any carbon buildup
in the combustion chamber2Lay straightedge across the cylinder head; then using feeler gauge, check the distortion factor
between the head and the straightedge3Maximum distortion is 0.05 mm (0.002 in Incorrect installation of the piston rings
will result in engine damage CYLINDERCYLINDER HEAD ASSEMBLY NOTE: If the cylindercylinder head assembly cannot be trued,
they must be replaced CleaningInspecting Cylinder Head CAUTION The cylinder head studs must be removed for this procedure
1Using non-metallic carbon removal tool, remove any carbon buildup from the combustion chamber being careful not to nick,
scrape, or damage the combustion chamber or the sealing surface2Inspect the spark plug hole for any threadsRepair damaged