2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 51Get this manual
7Note the timing marks for installing purposes; then drop the sprocket off the camshaftWhile holding the chain, slide the sprocket and camshaft out of the cylinder headAccount for an alignment pin
10Remove the cylinder head from the cylinder, remove the gasket, and account for two alignment pins
MD1163 MD1132
NOTE: Loop the chain over the cylinder and secure it with wire to keep it from falling into the crankcase
AT THIS POINT
To service valves and cylinder head, see Servicing Top-Side Components sub-section