2006 Arctic Cat Y-6/Y-12 50cc and 90cc Service Manual, Page 38Get this manual

2006 Arctic Cat Y-6/Y-12 50cc and 90cc Service Manual, Page 38

2Insert an inside dial indicator into the piston pin boreThe maximum diameter must be within specificationsTake two measurements
do not overlapStagger the end gaps of the scraper rings according to the illustration ! CAUTION Incorrect installation of
the piston rings will result in engine damage 1Using non-metallic carbon removal tool, remove any carbon buildup from the
combustion chamber being careful not to nick, scrape, or damage the combustion chamber or the gasket sealing surface2Inspect
the spark plug hole for any damaged threadsRepair damaged threads using "heli-coil" insert3Place the cylinder head on Surface
Plate (pn 0644-016) covered with #400 grit wet-or-dry sandpaperUsing light pressure, move the cylinder head in figure eight
motionInspect the sealing surface for any indication of high spotsA high spot can be noted by bright metallic finishCorrect
any high spots before assembly by continuing to move the cylinder head in figure eight motion until uniform bright metallic
finish is attained ! CAUTION Water or parts-cleaning solvent must be used in conjunction with the wet or dry sandpaper or