2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 60Get this manual
2Place strip of plasti-gauge in each of the camshaft lands in the cylinder head3Place the valve cover on the cylinder head and secure with the valve cover cap screwsTighten securelyNOTE: Do not rotate the camshaft when measuring clearance
NOTE: If the journals are worn, replace the camshaft; then measure the clearance againIf it is still out of tolerance, replace the cylinder head
Inspecting Camshaft SpringDrive Pin 1Inspect the spring and drive pin for damage