Arctic Cat 400 Service Manual page 304

25. Loosen the four adjuster screw jam nuts; then
loosen the four adjuster screws on the rocker
arms in the valve cover.
26. Apply a thin coat of Three Bond Sealant (p/n
0636-070) to the mating surfaces of the cylinder
head and valve cover.
27. Place the valve cover into position.
NOTE: At this point, the rocker arms and
adjuster screws must not have pressure on them.
28. Install the four top side valve cover cap screws
with rubber washers; then install the remaining
cap screws. Tighten only until snug.
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29. In a crisscross pattern starting from the center
and working outward, tighten the cap screws
(from step 28) securely.
30. Adjust valve/tappet clearance using the follow-
ing procedure.
NOTE: Use Valve Clearance Adjuster (p/n
0444-078) for this procedure.
A. Turn the engine over until the piston reaches
top dead center on the compression stroke.
B. Place the valve adjuster onto the jam nut
securing the tappet adjuster screw; then rotate
the valve adjuster dial clockwise until the end
is seated in the tappet adjuster screw.
C. While holding the valve adjuster dial in
place, use the valve adjuster handle and
loosen the jam nut; then rotate the tappet
adjuster screw clockwise until friction is felt.
D. Align the valve adjuster handle with one of
the marks on the valve adjuster dial.
E. While holding the valve adjuster handle in
place, rotate the valve adjuster dial counter-
clockwise until specified valve/tappet clear-
ance is attained.
NOTE: Rotating the valve adjuster dial counter-
clockwise will open the valve/tappet clearance by
0.05 mm (0.002 in.) per mark.
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