15
6. When proper track tension is
obtained, tighten the adjusting bolt
jam nuts against the axle housings.
7. Tighten the idler wheel cap screws
securely.
NOTE: Since track tension and
track alignment are interrelated,
always check both even if only one
adjustment seems necessary.
Track Alignment
Proper track alignment is obtained when
the outside of the rear idler wheels are
equal distance from the edge of the track.
Excessive wear to the idler wheels, drive
lugs, and track will occur if the track is
improperly aligned. Yamaha recom-
mends that the track alignment be
checked once a week or whenever the
track tension is adjusted.
Checking Track Alignment
1. Position the tips of the skis against a
wall; then using a shielded safety
stand, raise the rear of the snowmo-
bile off the floor making sure the
track is free to rotate.
2. Start the engine and accelerate
slightly. Use only enough throttle to
turn the track several revolutions.
SHUT ENGINE OFF.
NOTE: Allow the track to coast to a
stop. DO NOT apply the brake
because it could produce an inaccu-
rate alignment condition.
3. When the track stops rotating, check
the relationship of the idler wheels
and the edge of the track. If the dis-
tance from the rear idler wheels to
the edge of the track is the same on
both sides, no adjustment is neces-
sary.
4. If the distances from the idler wheels
to the edge of the track are not the
same on both sides, an adjustment is
necessary.
Adjusting Track Alignment
1. On the side of the track which has
the edge of the track furthest to the
outside of the rear idler wheel,
loosen the idler wheel cap screw and
the adjusting bolt jam nut; then
rotate the adjusting bolt clockwise 1
to 1 1/2 turns.
SNO-949
2. Check track alignment and continue
adjustment until proper alignment is
obtained.
NOTE: Make sure correct track
tension is maintained after adjust-
ing track alignment (see Track Ten-
sion section).
! WARNING
If jam nuts are not tightened prop-
erly, the adjusting bolts could loosen
causing the track to become
extremely loose and, under some
operating conditions, allow the idler
wheels to climb over the track lugs
forcing the track against the tunnel
causing the track to “lock.” If a track
“locks” during operation, severe per-
sonal injury could result.
! WARNING
Make sure the ignition key is in the
OFF position and the track is not
rotating before checking or adjust-
ing track alignment. Personal injury
could result if contact is made with a
rotating track.
! WARNING
The tips of the skis must be posi-
tioned against a wall or similar
object for safety.
