2007 Arctic Cat ATVs 400/500/650/700 Service Manual, Page 216Get 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 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) and tighten to specificationsBend the tab to secure the cap screw
! CAUTION
If any of the above factors are not as stated, go back to step 11 and carefully proceed
16Place the tab-washer onto the sprocket making sure it covers the pin in the alignment hole
19Rotate the crankshaft until the first cap screw (from step 17) can be addressed; then tighten to specificationsBend the tab to secure the cap screw