2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 74Get this manual

2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 74

Measuring Rocker Arm Shaft (Outside Diameter) CleaningInspecting Piston 1Using micrometer, measure the outside diameter of
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 "blowby" indicates worn piston rings or an
out-of-round cylinderRemoving Piston Rings ATV-1011 1Starting with the top ring, slide one end of the ring out of the ring-groove
NOTE: The 250 has only the larger spring 4Place spring retainer over the valve springs; then using the valve spring compressor,
compress the valve springs and install the valve cotters 2Remove each ring by working it toward the dome of the piston while
rotating it out of the groove NOTE: If the existing rings will not be replaced with new ones, note the location of each ring
for proper installationWhen installing new rings, install as complete set only PISTON ASSEMBLV NOTE: Whenever piston, rings,