2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 218Get this manual

2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 218

Servicing ValvesValve GuidesValve Seats If valves, valve guides, or valve seats require servicing or replacement, Arctic
and install the valve cotters PISTON ASSEMBLY NOTE: Whenever piston, rings, or pin are out of tolerance, they must be replaced
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 oilCC144D NOTE: If scuffing or seizure marks are too deep to correct with
the sandpaper, replace the piston 2Insert each valve into its original valve location3Install the valve springs with the
painted end of the spring facing away from the cylinder headNOTE: If the paint is not visible, install the ends of the springs
with the closest wound coils toward the head 4Inspect the perimeter of each piston for signs of excessive "blowby Excessive
"blowby" indicates worn piston rings or an out-of-round cylinderRemoving Piston Rings 1Starting with the top ring, slide