2007 Arctic Cat Y-12 90cc ATV Service Manual, Page 37Get this manual

2007 Arctic Cat Y-12 90cc ATV Service Manual, Page 37

DSC02176 2Insert an inside dial indicator into the piston pin boreThe maximum diameter must be within specificationsTake
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 DSC02178 INSTALLING PISTON RINGS 1Install the oil expander
ring in the bottom ring groove of the piston; then install the lower and upper scraper rings over the expander making sure
the ends of the expander 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 ! CAUTION Water or parts-cleaning solvent must be