Yamaha RST90G Owner's Manual page 96

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Periodic maintenance and adjustment
1. Spring scale
TIP
Measure the gap between the slide runner
and the edge of the track window on both
sides.
1. Drive track deflection
2. Slide runner
Standard drive track deflection:
30.0–35.0 mm (1.18–1.38 in)
3.
If the deflection is incorrect, adjust the
drive track.
Adjusting the drive track alignment and de-
flection
1.
Loosen the rear axle nut.
90
1. Rear axle nut
2.
Lift the rear of the snowmobile onto a
suitable stand to raise the drive track off
the ground.
3.
Start the engine and rotate the drive
track one or two turns. Stop the engine.
4.
Align the drive track by turning the left
2
and right adjusting nuts.
Drive track
alignment
Left adjusting
nut
Right adjust-
ing nut
1. Left adjusting nut
2. Right adjusting nut
Shifted to
Shifted to left
right
Turn out
Turn in
Turn in
Turn out

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