LEN PERFORMANCE LS4-50003F Front Track Shock for Select Polaris Snowmobiles

The LEN PERFORMANCE LS4-50003F Front Track Shock is designed for select Polaris snowmobile applications, including specified 2021 and 2022 Indy VR1 and Indy XCR models. This front track shock features adjustable performance settings to help tailor suspension behavior for trail and mountain riding.

A 5-click compression adjustment makes on-trail and mountain setting changes straightforward. The shock also features anodized dual-ring locking adjusters for preload adjustment while helping keep the selected setting in place. Its hardened Chromoly shaft is designed to increase overall strength and seal longevity, while the forged aluminum eyelet head uses premium steel and NBR bushings.

The spring is powder coated to help reduce corrosion and support durability under harsh conditions. The threaded body provides preload adjustability, and rebuild kits and replacement parts are available for servicing and custom valving. This shock is sold individually.

Fitment includes 2021 Polaris 650 Indy VR1 129-inch and 137-inch models, 2021 Polaris 850 Indy VR1 129-inch and 137-inch models, 2022 Polaris 650 Indy VR1 129-inch and 137-inch models, 2022 Polaris 850 Indy VR1 129-inch and 137-inch models, and 2022 Polaris 650 Indy XCR 128/129-inch and 136/137-inch models.

Features:

• 5-click compression adjustment makes it easy to adjust settings on the trail and mountain
• Anodized dual-ring locking adjusters provide preload adjustment and help keep settings in place
• Hardened Chromoly shaft increases overall strength and seal longevity
• Powder-coated spring helps reduce corrosion and support durability
• Threaded body provides preload adjustability
• Forged aluminum eyelet head with premium steel and NBR bushings
• Rebuild kits and replacement parts are available for servicing and custom valving
• Sold individually

Fitment:
Polaris 650 Indy VR1 129" 2021
Polaris 650 Indy VR1 129" 2022
Polaris 650 Indy VR1 129" 2023
Polaris 650 Indy VR1 137" 2021
Polaris 650 Indy VR1 137" 2022
Polaris 650 Indy VR1 137" 2023
Polaris 650 Indy VR1 137" 2024
Polaris 650 Indy VR1 137" 2025
Polaris 650 Indy XC 129" 2022
Polaris 650 Indy XC 129" 2023
Polaris 650 Indy XC 129" 2024
Polaris 650 Indy XC 137" 2022
Polaris 650 Indy XC 137" 2023
Polaris 650 Indy XC 137" 2024
Polaris 650 Indy XCR 128/129" 2022
Polaris 650 Indy XCR 128/129" 2023
Polaris 650 Indy XCR 128/129" 2024
Polaris 650 Indy XCR 128/129" 2025
Polaris 650 Indy XCR 136/137" 2022
Polaris 650 Indy XCR 136/137" 2023
Polaris 650 Indy XCR 136/137" 2024
Polaris 650 Indy XCR 136/137" 2025
Polaris 850 Indy Adventure 137" 2022
Polaris 850 Indy Adventure 137" 2023
Polaris 850 Indy VR1 129" 2021
Polaris 850 Indy VR1 129" 2022
Polaris 850 Indy VR1 129" 2023
Polaris 850 Indy VR1 137" 2021
Polaris 850 Indy VR1 137" 2022
Polaris 850 Indy VR1 137" 2023
Polaris 850 Indy VR1 137" 2024
Polaris 850 Indy VR1 137" 2025
Polaris 850 Indy XC 129" 2022
Polaris 850 Indy XC 129" 2023
Polaris 850 Indy XC 129" 2024
Polaris 850 Indy XC 137" 2022
Polaris 850 Indy XC 137" 2023
Polaris 850 Indy XC 137" 2024
Polaris 850 Indy XCR 128" 2022
Polaris 850 Indy XCR 128" 2023
Polaris 850 Indy XCR 128" 2024
Polaris 850 Indy XCR 128" 2025
Polaris 850 Indy XCR 136" 2022
Polaris 850 Indy XCR 136" 2023
Polaris 850 Indy XCR 136" 2024
Polaris 850 Indy XCR 136" 2025
Polaris Patriot 9R Indy XCR 128" 2025
Polaris Patriot 9R Indy XCR 136" 2025