2004 Arctic Cat ATVs factory service and repair manual, Page 373Get this manual
9Loosely install the five cylinder head nuts I NOTE: At this point, oil the camshaft bearings, cam lobes, and the three seating journals on the cylinder
13With the cam lobes directed down (toward the piston)maneuver the camshaftlsrocket assembly through the chain and towards its seating position; then loop the chain over the sprocket
I NOTE: Note the position of the alignment marks on the end of the camshaftThey must be parallel with the valve cover mating surfaceIf rotating the camshaft is necessary for alignment, do not allow the chain and sprocket to rotate and be sure the cam lobes end up in the down position
10In crisscross pattern, tighten the four cylinder head cap screws (from step 8) to 3.8 kg-m (27.5 ft-lb); then tighten the mm nut (from step 9) to 2.5 kg-m (18 ft-lb)Using crisscross pattern, tighten the four mm nuts (from step 9) to 1.1 kg-m (8 ft-lb)Tighten the two cylinder-tocrankcase nuts securely11With the timing inspection plug removed and the chain held tight, rotate the crankshaft until the piston is at top-dead-center12With the alignment pin installed in the camshaft, loosely place the cam sprocket (with the recessed side facing the cam shaft lobes) onto the camshaftAt this point, do not "seat" the sprocket onto the shaft