Arctic Cat 400 Service Manual page 172

12. With the alignment pin installed in the camshaft
and the cam lobes directed down (toward the
piston), place the camshaft in position and verify
that the timing mark on the magneto is visible
through the inspection plug and that the timing
marks on the camshaft sprocket are parallel with
the valve cover mating surface.
NOTE: When the camshaft assembly is seated,
make sure the alignment pin in the camshaft aligns
with the smallest hole in the sprocket.
13. With the alignment pin installed in the camshaft,
loosely place the cam sprocket (with the
recessed side facing the camshaft lobes) onto the
camshaft and place it into position with the cam
chain over the sprocket.
14. Place the C-ring into position in its groove in the
cylinder head.
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NOTE: At this point, oil the camshaft bearings,
cam lobes, and the three seating journals on the
cylinder.
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. When the camshaft assembly is seated, ensure
the following.
A. Piston still at top-dead-center.
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 13 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. Apply red Loctite #271 to the first cap screw
securing the sprocket and tab washer to the cam-
shaft; then install the cap screw and tab washer.
Tighten cap screw only until snug.
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MD1363
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