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However, the drive clutch and driven
clutch should be disassembled, cleaned,
and inspected by an authorized Yamaha
Snowmobile dealer after every 4000 km
(2500 miles) or seasonally, whichever
occurs first. This service is at the discre-
tion and expense of the snowmobile
owner.
When operating the snowmobile at high
altitudes, it may be necessary to change
certain component parts of the drive
clutch and/or the driven clutch. See an
authorized Yamaha Snowmobile dealer
for further information.
CAUTION
DO NOT attempt to service the drive
clutch and driven clutch. The drive
clutch and driven clutch must be ser-
viced by an authorized Yamaha Snow-
mobile dealer only.
Drive Clutch/Driven
Clutch Alignment
The alignment between the drive clutch
and driven clutch is set at the factory.
Normally, no adjustment is necessary as
long as neither the drive clutch nor the
driven clutch is removed or disassem-
bled. However, if premature drive belt
wear is experienced or if the drive belt
turns over, the drive clutch/driven clutch
alignment must be checked. Take the
snowmobile to an authorized Yamaha
Snowmobile dealer for this service. If not
under warranty, this service is at the dis-
cretion and expense of the snowmobile
owner.
Fuel Pump
The fuel pump is designed to provide
adequate amount of gas to the
at all throttle settings. If a fuel delivery
problem is suspected, take the snowmo-
bile to an authorized Yamaha Snowmo-
bile dealer. If not under warranty, this
service is at the discretion and expense of
the snowmobile owner.
Track/Track Studs
Accelerated wear strip and track clip
wear caused by operating on ice or hard-
packed snow conditions is NOT covered
under Yamaha warranty policy.
10
NOTE: If operating on ice or hard-
packed snow conditions, it is recom-
mended that Ice Scratchers be
installed to reduce wear strip wear
and engine overheating. If regularly
operating on ice or hard-packed
snow conditions, Performance Wear
Strips may be installed at the
expense of the snowmobile owner.
In general, track life will be shortened
when studs are installed. Drilling stud
holes into the drive track will cut the
internal fibers weakening the track.
Avoid spinning the drive track. Studs
may catch on an object and pull out of the
track leaving tears and damage around
the already weakened area. To minimize
possible damage, consult your stud man-
ufacturer for installation and stud pattern
recommendations. Yamaha does not rec-
ommend studding a track.
Reverse Operation
The electrical reverse function offers the
operator the convenience of being able to
back up the snowmobile rather than hav-
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
injectors
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.
1. Always warm up the engine for 2-3
minutes prior to shifting into reverse.
741-438A
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