2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 148Get this manual

2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 148

2Place strip of plasti-gauge in each of the camshaft lands in the cylinder head3Place the valve cover on the cylinder head
securing the valve cover to the cylinder; then remove the valve cover and camshaft 5Match the width of the plasti-gauge with
the chart found on the plasti-gauge packaging to determine camshaft to cylinder head and valve cover clearance NOTE: With
the weight extended, the unloader pin should be flat-side out; with the weight retracted, the unloader pin should be round-side