2004-2007 Honda Aquatrax ARX1200N3/T3/T3D Factory Service Manual, Page 323Get this manual
CYLINDER HEADVALVE Take care not to jam the cam chain at the crankshaft when turningThe "IN" mark is on the intake side and the "EX" mark is on the exhaust side
Turn the crankshaft counterclockwise (viewed from rear side) and align the "T" mark on the drive coupler boss with the index mark (arrow) on the crankcaseInstall the camshafts onto the cylinder head through the cam chain so the No1 cam lobes are facing up and inward diagonally
CAM CHAIN
"IN" No1 CAM LOBES