Polaris 550 Indy 144 Owner's Manual page 40

THE PERFECT FIT
Rear Suspension Adjustments
Rear Track Shock Spring
Measure the rear track shock spring length and adjust to the appropriate
length based on rider weight. Include passenger weight (if applicable)
and all riding gear, accessories and cargo weight in the calculation.
WARNING! Allow a passenger to ride only on models equipped with a
passenger seat.
1. Elevate and support the rear of
the snowmobile to remove the
weight from the suspension.
2. Use a tape measure to measure
the spring installed length
between the two spring retainers.
3. Refer to the chart on page 39 to
determine the correct spring
length for rider weight. If
adjustment is needed, clear away
any snow or ice trapped within
the spring or threads.
4. Using a spanner wrench, rotate the spring to adjust length.
NOTICE: Never adjust a spring beyond the maximum length shown in the chart.
Adjusting beyond maximum adjustment will cause the spring to
bottom and result in damage to your rear suspension.
38
Installed Length
Measurement