2007 Arctic Cat Four-Stroke Factory Service Manual, Page 86Get this manual

2007 Arctic Cat Four-Stroke Factory Service Manual, Page 86

! NOTE: The sprocket on the end of the crankshaft also serves as the oil pump drive AO324B

! CAUTION

27Rotate the crankshaft until the keyway faces straight up with the No1 piston at top dead center (TDC) and aligns with the mark on the crankcase
On the turbo engine, make sure the camshafts are installed on the correct sides of the cylinder head: the intake camshaft has first digit marked on the gear face and the exhaust camshaft has first digit marked on the gear face