3-25
3
ATV1027
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.
GZ195
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 Loc-
tite #271) and tighten to 10 ft-lb. Bend the tab to
secure the cap screw.
GZ193
18. Rotate the crankshaft until the first cap screw
(from step 17) can be tightened; then tighten to 10
ft-lb. Bend the tab to secure the cap screw.
19. Keeping tension on the rear cam chain, rotate the
engine forward 270° until rear piston is at TDC
indicated by timing mark R.
GZ060
20. With the cam lobes directed down (toward the pis-
ton), maneuver the camshaft/sprocket assembly
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 NOT be par-
allel with the valve cover but offset slightly to the
rear (approximately 5°). 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.
GZ189A
! 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.
! CAUTION
Failure to keep tension on any loose cam chain may
cause severe engine damage.
AT THIS POINT
Return the engine to TDC on the front cylinder making
sure the cam lobes are directed downward to ensure
correct starting point for step 19.
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