2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 64Get this manual
BCamshaft lobes directed down (toward the piston)CCamshaft alignment marks parallel to the valve cover mating surfaceDRecessed side of the sprocket directed toward the cam lobesECamshaft alignment pin and sprocket alignment hole (smallest) are aligned ! CAUTION
If any of the above factors are not as stated, go back to step 10 and carefully proceedCC404D
16Place the tab washer onto the sprocket making sure it covers the pin in the alignment hole
ATV-1027
18Rotate the crankshaft until the second cap screw securing the sprocket to the camshaft can be installed; then install the cap screw (threads coated with red Loctite #271)Tighten to 11 ft-lb; then bend the tab to secure the cap screw