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IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle. Always follow the warnings and instructions in Owner's Manual.

Click the link above for the Table Of Contents, or download a full PDF of the Owner Manual in the Owner Support area of Polaris.com.

Rear Track Shock Spring (144)

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. Securely 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 the next page 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 adjustment length shown in the chart. Adjusting beyond maximum adjustment will cause the spring to bottom and result in damage to your rear suspension.

Adjust the rear track shock spring per the charts on below.

EVO RMK Models

REAR TRACK SHOCK SPRING (RTSS) SET-UP
(Standard Spring)

Measure spring length with suspension off the ground

Rider Weight(including all riders, gear, cargo, & accessories

Model

Installed Spring Length(rear suspension off the ground)

Shaded cells indicate factory settings.

< 160 lbs

< 73 kg

EVO RMK

9.5 in.

24.1 cm

 

160-220 lbs

73-100 kg

EVO RMK

9.12 in.

23.2 cm

 

220-280 lbs.

100-127 kg

EVO RMK

8.75 in.

22.2 cm

*RMK EVO maximum adjustment is 8.5 in. (21.6 cm)

550 INDY Models

REAR TRACK SHOCK SPRING (RTSS) SET-UP
(Standard Spring)

Measure spring length with suspension off the ground

Rider Weight (including all riders, gear, cargo, & accessories

Model

Installed Spring Length (rear suspension off the ground)

Shaded cells indicate factory settings.

< 160 lbs

< 73 kg

550 INDY Adventure/Voyageur/LXT

11.125"

28.2 cm

550 INDY 144

160-220 lbs

73-100 kg

550 INDY Adventure/Voyageur/LXT

10.75"

27.3 cm

550 INDY 144

10.5"

26.7 cm

220-280 lbs.

100-127 kg

550 INDY Adventure/Voyageur/LXT

10.5"

26.7 cm

550 INDY 144

10.125"

25.7 cm

280-340 lbs.

127-154 kg

550 INDY Adventure/Voyageur/LXT

10.125"

25.7 cm

550 INDY 144

9.75"
Maximum
Adjustment

24.7 cm
Maximum
Adjustment

340-360 lbs. 154-163 kg

550 INDY Adventure/Voyageur/LXT

9.875"
Maximum
Adjustment

25 cm
Maximum
Adjustment