2011 Arctic Cat 400 TRV ATV Service Manual, Page 28Get this manual
2Remove the cylinder head cover cap screwsNote the rubber washers on the four top-side cap screws; remove the coverNote the orientation of the cylinder head plug and remove itNote the location of the two alignment pins MD1251
5Bend the washer tabs and remove the two cap screws securing the sprocket to the camshaft
MD1354A