2008 Arctic Cat ThunderCat ATV Service Manual, Page 50Get this manual
ATV-1027
21Seat the cam sprocket onto the camshaft making sure the alignment pin in the camshaft aligns with the smallest hole in the sprocket; then place the camshaftsprocket assembly onto the cylinder ensuring the following
! CAUTION
Care must be taken that the tab-washer is installed correctly to cover the alignment hole on the sprocketIf the alignment pin falls out, severe engine damage will result
23Install the first cap screw (threads coated with red Loctite #271) securing the sprocket and tab-washer to the camshaftTighten only until snug
732-307B