35
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 rear idler wheels are equal distance
from the inner track drive lugs. Excessive
wear to the idler wheels, drive lugs, and
track will occur if the track is improperly
aligned. Yamaha recommends that the
track alignment be checked once a week
or whenever the track tension is adjusted.
Checking Track Alignment
1. Remove excess ice and snow buildup
from the track, track drive sprockets,
and the inside of the skid frame.
2. 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.
3. 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 inac-
curate alignment condition.
4. When the track stops rotating, check
the relationship of the rear idler
wheels and the inner track drive lugs.
If the rear idler wheels are centered
between the inner track drive lugs, no
adjustment is necessary.
0745-809
0748-448
5. If the idler wheels are not centered
between the inner track drive lugs,
an adjustment is necessary.
Adjusting Track Alignment
1. On the side of the track which has the
inner track drive lugs closer to the rear
idler wheel, loosen the idler wheel
axle cap screw; then rotate the adjust-
ing bolt clockwise 1 to 1 1/2 turns.
WARNING
Always make sure the adjusting
bolts are snug against the axle and
the idler wheel cap screws are tight-
ened to specifications. Failure to do
so could cause 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
personal 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.
WARNING
DO NOT stand behind the snowmo-
bile or near the rotating track.
NEVER run the track at high speed
when the track is suspended.
Idler Wheel Assembly
Inner Track Lugs
Inner Track Lugs
Idler Wheel Assembly
Inner Track Lugs
Inner Track Lugs
146”
U8KCS1E0.book Page 35 Tuesday, May 16, 2017 5:42 PM
