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For proper installation, use the following
procedure:
1. Using the appropriate stud template
(see chart), mark the desired stud
pattern to be used.
Stud Template Chart
Track Length
129 in.
137/141 in.
2. Using the proper-sized stud hole
drill bit, drill out the stud holes.
3. Push the stud through the hole from
inside the track; then place the
domed support plate and lock nut on
the exposed stud.
4. Using a wrench to secure the stud,
tighten the lock nut on the exposed stud.
It is also recommended that whenever studs
are installed on a track, carbide wear bars
should be installed on the skis. Carbide wear
bars complement the track studs to balance
steering control under these conditions. The
length of the carbide on the wear bars should
be proportionate to the number of track
studs (i.e. small number of track studs ——
short length of carbide...many track studs ——
long length of carbide). The proper propor-
tion between the number of studs and car-
bide length on the wear bar will maintain
steering balance.
! WARNING
Always balance the snowmobile with
the proper proportion between the
number of studs and carbide length
on the wear bars. Do not "over drive"
conditions; use common sense in all
operating conditions.
CAUTION
Do not use studs that are more than
9.525 mm (0.375 in.) longer than the
track lug height.
! WARNING
Do not operate a snowmobile with
loose studs as they may be thrown
from the track. Always use a shielded
safety stand whenever performing
any maintenance or adjustments.
18
DO NOT stand behind the snowmo-
bile or near the rotating track. NEVER
run the track at high speed when the
track is suspended.
Reverse Operation
The engine reverse function offers the
p/n
operator the convenience of being able to
6639-143
back up the snowmobile rather than hav-
4639-991
ing to turn the snowmobile around by
hand. This feature, under most situations,
should not be used to free a stuck snow-
mobile as it will tend to dig the skis
deeper into the snow. Always use mini-
mal speed when operating in reverse and
come to a complete stop before shifting
from either forward to reverse or reverse
to forward.
Shifting Into Reverse
NOTE: Correct drive belt tension
(deflection) is important for the
reverse function to operate properly.
If the belt is too tight, difficulty in
engaging reverse will be experi-
enced (the reverse function will
make up to three attempts to engage
into reverse, and if the function is
not
completed
attempt, the engine will shut down).
1. Always warm up the engine for 2-3
minutes
reverse. The reverse function is can-
celled when engine temperature is
below or above normal operating
range.
2. Shift only with the engine at idle
RPM and the snowmobile com-
pletely stopped. The reverse func-
tion will not engage if engine is
above 3000 RPM.
! WARNING
741-438A
after
the
prior
to
shifting
third
into
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