2004 Arctic Cat ATVs factory service and repair manual, Page 72Get this manual
Measuring Rocker Arm Shaft (Outside Diameter)
Cleaningllnspecting Piston
1Using micrometer, measure the outside diameter of the rocker arm shaft2Acceptable outside diameter range must be within specificationsInstalling Valves
1Using non-metallic carbon removal tool, remove any carbon buildup from the dome of the piston2Inspect the piston for cracks in the piston pin, dome, and skirt areas3Inspect the piston for seizure marks or scuffingRepair with #400 grit wet-or-dry sandpaper and water or honing oil
1Apply grease to the inside surface of the valve seals; then place lower spring seat and valve guide seal over each valve guide2Insert each valve into its original valve location
3Install the valve springs with the painted end of the spring facing away from the cylinder headI NOTE: If the painted end is not visible, install the ends of the springs with the closest coils toward the head
Towards
I NOTE: If scuffing or seizure marks are too deep to correct with the sandpaper, replace the piston