Drive Chain Tensioner; Rear Suspension; Track Tension - Yamaha SRX 120 2017 Operator's Manual

 NOTE: If the recommended chain
lube or a dry, graphite-based chain
lubricant is not available, lubricate
the drive chain with several drops of
petroleum-based oil. If the snowmo-
bile is operated in the summer with
the optional wheel kit, the drive chain
should be lubricated more frequently.

Drive Chain Tensioner

The drive chain tensioner is automatic;
therefore, no adjustment is required by
the snowmobile owner. The tensioner
and chain should be checked annually for
proper operation and excessive wear and
replaced when necessary. Check the ten-
sioner by pushing down on it and releas-
ing it. It should immediately spring back
and put tension on the drive chain.

Rear Suspension

This procedure should be done every 20
operating hours.
1. Shut engine off and wait for all mov-
ing parts to stop.
2. With the gas tank nearly empty (less
than 1/4 full), lay the snowmobile on
its side. A piece of cardboard should
be used to protect the finish on the
hood and belly pan.
3. Remove ice and snow buildup from
the skid frame to expose the two
grease fittings.
4. Lubricate the grease fittings with an
all-temperature grease.

Track Tension

NOTE: Track tension and track

alignment are interrelated; there-
fore, always check both, even if only
one adjustment seems necessary.
Track tension is directly related to the
overall performance of the snowmobile.
If the track is too loose, it may slap
against the tunnel causing wear, or it may
ratchet on the track drive sprockets.
Yamaha recommends that the track ten-
sion be checked once a month and
adjusted accordingly.
Downloaded from ManualsNet.com
Track tension must be properly main-
tained. Personal injury could result if
a track is allowed to become exces-
sively loose.
Checking Track Tension
DO NOT attempt to check or adjust
track tension with engine running.
Turn ignition key to the OFF position.
Personal injury could result from
contact with a rotating track.
1. Remove excess ice and snow
2. Place the rear of the snowmobile up
3. Without exerting any pressure on the
Adjusting Track Tension
1. Loosen the idler wheel cap screws.
2. Loosen the rear idler wheel adjust-
search engine
! WARNING
! WARNING
buildup from the track, track drive
sprockets, and the inside of the skid
frame.
on a safety stand high enough so the
track is free of the floor.
track, measure the distance between
the bottom of the wear strip and the
inside surface of the track. The mea-
surement must be within specifica-
tions of 6.4-9.5 mm (1/4-3/8 in.). If
the measurement is not within speci-
fications, an adjustment is necessary.
ing bolt jam nuts.
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