Track tension is important to the overall performance of the snowmobile. A new track will stretch after break-in and will require adjustment. From then on, the track should be inspected before every ride to ensure the sled is reaching its full potential. Failure to do so may lead to ratcheting, hesitation and excessive wear to the rear suspension and track.
Model Year 2021 Pro-RMK and RMK KHAOS with 155 and 165 Tracks
New for model year 2021, Pro-RMK and RMK KHAOS models feature high-performance 155 or 165 Series 8 tracks. The Series 8 track has 2.75-inch tall lugs and a 3.5-inch pitch. These tracks are lightweight, offering 4 to 5 pounds of weight savings over the equivalent Series 7 track, while the longer pitch provides more off-trail performance with increased lift and response. The track's high-performance features result in a track that requires regular maintenance during the break-in period.
It is very important to inspect and adjust track tension after every ride for the first 150 miles of use to ensure the proper tension as the track stretches during break-in. Check the track tension every 150 miles after the initial break-in period. If track tension is neglected, a loose track may result in damage to the suspension, track or driveshaft. If you experience extreme vibration under hard acceleration or track loads, track tension should be checked immediately, as continued use could result in permanent damage.
Track Tension Inspection and Adjustment
To inspect and adjust the track tension and alignment on your Polaris snowmobile, follow these steps:
1. Before beginning, ensure the track has been warmed up.
2. Safely elevate the vehicle. Refer to your Owner’s Manual for proper lifting techniques.
3. Rotate the track by hand to check for damage.
4. If inspection reveals any concerns, see your authorized Polaris Service Center.
5. Next, measure 16 inches (40 cm) ahead of the rear idler shaft on the track.
6. Apply 10 pounds of weight on the track and measure the slack between the track and the rails. Reference your Owner’s Manual for accurate specifications.
7. If the track requires adjustment, start by loosening the rear idler shaft bolt with a 16mm socket. Do not remove.
8. Then use a 16mm wrench to loosen the adjuster locknuts on both sides of the track.
9. Use a 10mm socket to tighten or loosen the track adjusting screws on both sides of the track to provide equal adjustment of the track tension.
10. After adjusting, tighten the locknuts until fully seated.
11. Then torque the idler shaft fastener to specification. Refer to your Owner’s Manual for specifications.
12. Next, start the engine and apply a small amount of throttle until the track slowly turns at least five complete revolutions. Stop the engine and allow the track to come to a complete stop without applying the brakes.
13. Inspect the track alignment through the track windows in the rear to ensure the rails are evenly spaced on each side.
14. If the track is offset to either side, loosen the adjustment nuts and tighten the affected side as needed to gain alignment.
15. Start the engine again and apply a small amount of throttle until the track turns slowly for at least five revolutions. Stop the engine and allow the track to come to a complete stop without applying the brakes.
16. Reinspect the track alignment and repeat this procedure as needed.
17. Safely lower the vehicle to the ground after completing your adjustments.
To learn more about track maintenance, listen to the Don't Slack, Check Your Skis and Track episode of the Polaris Podcast.
For more information, see your authorized Polaris Dealer. To find a dealer near you, use the Dealer Locator.
Maintenance tips, procedures and specifications can be found in your Owner's Manual.
To find diagrams and replacement part numbers, use the online parts catalog.