2007 Arctic Cat Four-Stroke Factory Service Manual, Page 145Get this manual
11With light film of engine oil applied to the tappets, install the correct shim (A) and tappet (B) to each valve being adjusted 14With the cam chain properly seated to the gears of the crankshaft and exhaust camshaft, install the intake camshaft noting that the timing marks (B) are properly aligned! NOTE: With the camshafts and cam chain in place, there should be exactly 16 pins from intake cam mark to exhaust cam mark 2
! NOTE: Prior to installing the camshaft, it is advisable to apply engine-assembly grease to the camshaft journals and lobes
12With the crankshaft rotated to the top-dead-center position, place the cam chain over the sprocket of the exhaust camshaft! NOTE: The exhaust camshaft must be installed first