2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 289Get this manual
7Place the head gasket into position on the cylinderPlace the alignment pins into position; then place the head assembly into position on the cylinder
10Align the TDC line on the rotorflywheel with the index mark on the magneto cover; then install the camshaft idler into the cam chain and align the punch mark (1) with the index rib (2)Adjust the idler in the chain as necessary to align the marks
8Install the five 10 mm cylinder head cap screws and tighten in the sequence shown to an initial torque of 18 ft-lb; then using the same sequence, tighten to final torque of 27 ft-lbNOTE: Apply engine oil to the threads and both sides of the washers before installing the cylinder head cap screws