2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 145Get this manual

2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 145

Measuring Rocker Arm (Inside Diameter) 4Place spring retainer over the valve springs; then using the valve spring compressor,
CleaningInspecting Piston 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 2Insert each valve into its original valve location3Install the valve
springs with the painted end of the spring facing away from the cylinder head NOTE: If the painted end is not visible, install
the ends of the springs with the closest coils toward the head Towards NOTE: If scuffing or seizure marks are too deep to
correct with the sandpaper, replace the piston 4Inspect the perimeter of each piston for signs of excessive "blowby Excessive