Arctic Cat 500 Service Manual page 151

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 alignment
hole (smallest) are aligned.
CAUTION
If any of the above factors are not as stated, go back to
step 11 and carefully proceed.
15. 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 cor-
rectly to cover the alignment hole on the sprocket. If the
alignment pin falls out, severe engine damage will result.
16. Install the first cap screw (threads coated with red
Loctite #271) securing the sprocket and tab-washer
to the camshaft. Tighten only until snug.
GZ190B
17. Keeping tension on the opposite cam chain, rotate
the crankshaft until the second cap screw securing
the sprocket to the camshaft can be installed; then
install the cap screw (threads coated with red Loctite
#271) and tighten to 11 ft-lb. Bend the tab to secure
the cap screw.
Failure to keep tension on any loose cam chain may
cause severe engine damage.
18. Rotate the crankshaft until the first cap screw (from
step 16) can be tightened; then tighten to 11 ft-lb.
Bend the tab to secure the cap screw.
Return the engine to TDC on the front cylinder making
ATV1027
sure the cam lobes are directed downward to ensure
correct starting point for step 19.
19. Keeping tension on the rear cam chain, rotate the
engine forward 270° until rear piston is at TDC indi-
cated by timing mark R.
CAUTION
AT THIS POINT
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GZ195
GZ193
149