2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 227Get this manual
16Install the first cap screw (threads coated with red Loctite #271) securing the sprocket and tab-washer to the camshaftTighten only until snug
20Install the cylinder head plug in the cylinder head with the opening of the plug directed downward and toward the inside
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17Rotate 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 11 ft-lbBend the tab to secure the cap screw