2005 Arctic Cat ATVs factory service and repair manual, Page 87Get this manual

2005 Arctic Cat ATVs factory service and repair manual, Page 87

Measuring Rocker Arm Shaft (Outside Diameter) CleaningInspecting Piston 1Using micrometer, measure the outside diameter of
coils toward the head Towards I NOTE: If scuffing or seizure marks are too deep to correct with the sandpaper, replace the
piston 4Inspect the perimeter of the 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 one end of the ring out of the ring-grooveI
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 grooveI 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 ASSEMBLY I NOTE: Whenever piston,