Arctic Cat 400 Service Manual page 229

14. With the cam lobes directed down (toward the
piston), maneuver the camshaft/sprocket assem-
bly through the chain and towards its seating
position; then loop the chain over the sprocket.
NOTE: Note the position of the alignment marks
on the end of the camshaft. They must be parallel
with the valve cover mating surface. If rotating the
camshaft is necessary for alignment, do not allow
the chain and sprocket to rotate and be sure the
cam lobes end up in the down position.
15. Seat 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 camshaft/sprocket assembly onto the cylin-
der ensuring the following.
A. Piston still at top-dead-center.
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B. Camshaft lobes directed down (toward the
piston).
C. Camshaft alignment marks parallel to the
valve cover mating surface.
D. Recessed side of the sprocket directed toward
the cam lobes.
E. Camshaft alignment pin and sprocket align-
ment hole (smallest) are aligned.
! CAUTION
If any of the above factors are not as stated, go
back to step 11 and carefully proceed.
16. Place the tab-washer onto the sprocket making
sure it covers the pin in the alignment hole.
! CAUTION
Care must be taken that the tab-washer is installed
correctly to cover the alignment hole on the
sprocket. If the alignment pin falls out, severe
engine damage will result.
17. Install the first cap screw (threads coated with
red Loctite #271) securing the sprocket and
tab-washer to the camshaft. Tighten only until
snug.
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