2004 Arctic Cat ATVs factory service and repair manual, Page 329Get this manual
2Place the valve cover on the Surface Plate (pn 0644-016) covered with #400 grit wet-or-dry sandpaperUsing light pressure, move the valve 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 valve cover in figure eight motion until uniform bright metallic finish is attained 2Remove the valve seal and the lower remaining spring seatDiscard the valve seal
Do not remove an excessive amount of the sealing surface or damage to the camshaft will resultAlways check camshaft clearance when resurfacing the valve cover
I NOTE: The valve seals must be replaced
Water or parts-cleaning solvent must be used in conjunction with the wet-or-dry sandpaper or damage to the sealing surface may result