2011 Arctic Cat 400 TRV ATV Service Manual, Page 40Get this manual
9In crisscross pattern, tighten the four cylinder head cap screws (from step 7) to 28 ft-lbTighten the two lower cylinder head nuts (from step 8) to 20 ft-lb and the cylinder-to-crankcase nuts (from step 4) to ft-lb10With the timing inspection plug removed and the cam chain held tight, rotate the crankshaft until the piston is at top-dead-center11While holding the cam chain sprocket to the side, install the rear cam chain tensioner guide into the cylinder headInstall the pivot cap screw and washer
7Install the four cylinder head cap screws with washersNote that the two cap screws on the right side of the cylinder head nearest the cam sprocket are longer than the two cap screws on the left (spark plug) sideTighten only until snug