2011 Arctic Cat 350/425 ATV Service Manual, Page 76Get this manual
2Place the cylinder head cover on the Surface Plate covered with #400 grit wet-or-dry sandpaperUsing light pressure, move the cylinder head cover 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 cover in figure eight motion until uniform bright metallic finish is attained CAUTION
Do not remove an excessive amount of the sealing surface or damage to the camshaft will resultAlways check camshaft clearance when resurfacing the cylinder head coverCC134D
NOTE: The valve seals must be replacedCC130D
CAUTION
Water or parts-cleaning solvent must be used in conjunction with the wet-or-dry sandpaper or damage to the sealing surface may result
3Remove the valve springs; then invert the cylinder head and remove the valvesMeasuring Valve Stem Runout 1Support each valve stem end with the Blocks; then check the valve stem runout using dial indicator