Len Performance Rear Track Shock, Arctic Cat ZR / XF 2014–2025 incl. ZR Catalyst (54-11000R)
Len Performance Rear Track Shock, Arctic Cat ZR / XF 2014–2025 incl. ZR Catalyst (54-11000R)
Len Performance
FREE ANCHORAGE PICKUP
Most orders are ready within 24 hours. Supplier-order exceptions are confirmed by email; freight to A2D is included in the product price. Need same-day pickup? Call 907-306-3062.
Shipping options and charges are shown at checkout. Shipping information.
CHECK YOUR FITMENT
Confirm your machine’s year, model, submodel, and the selected size or option before ordering. Need help? Contact the A2D team.
Product details
Len Performance LS4-11000R rebuildable rear track shock for the rear suspension on Arctic Cat ZR 5000 through ZR 9000 (129 / 137, including RR and Thundercat) 2014–2025, XF 6000 / 7000 / 8000 / 9000 Sno Pro, LXR, CrossTrek and Cross Country 2014–2019, and the 2024–2025 ZR 600 and 2025 ZR 858 Catalyst 129 / 137. It replaces the factory rear track shock with a reservoir shock that has 5-click compression adjustment. At $493.95 each, it is A2D's value pick for a rebuildable, adjustable reservoir rear track shock: clicker adjustment, a reservoir and a serviceable design without the cost of a race-level shock.
The rear track shock sets how the skid handles big hits, G-outs and bottoming with a passenger or gear on the tunnel. This is a springless unit that works with the factory rear torsion springs, so it drops in without changing the rest of the skid.
Fitment. Sold each. Pairs with the Len Performance 54-11000F front track shock for a complete rear suspension (Len Performance sells the pair as kit LS4-11000K). Matching ski shock: 54-11000. Chassis: Arctic Cat ProCross and Catalyst (ZR 600 / 858).
Fitment list (Len Performance year/model lookup)
- XF: 2014-2015 XF 6000; 2016-2019 XF 6000 Cross Country; 2016-2018 XF 6000 Crosstrek; 2014-2017 XF 7000 LXR 137; 2014-2017 XF 7000 Sno Pro 137; 2014-2017 XF 7000 Sno Pro 141; 2016-2019 XF 8000 Cross Country; 2016-2018 XF 8000 Crosstrek; 2014-2015 XF 8000 LXR 137; 2014-2015 XF 8000 Sno Pro 137; 2014-2015 XF 8000 Sno Pro 141; 2017-2019 XF 9000 Cross Country; 2016-2019 XF 9000 Crosstrek; 2014-2015 XF 9000 LXR 137; 2014-2015 XF 9000 Sno Pro 137
- ZR: 2014-2017 ZR 5000; 2024-2025 ZR 600 Catalyst 129; 2024-2025 ZR 600 Catalyst 137; 2014-2023 ZR 6000; 2016-2019 ZR 7000; 2014-2024 ZR 8000; 2022, 2024 ZR 8000 ES 137; 2025 ZR 858 Catalyst 129; 2025 ZR 858 Catalyst 137; 2016-2017 ZR 9000 129 RR; 2017-2025 ZR 9000 137 RR; 2019 ZR 9000 LTD; 2019-2025 ZR 9000 Thundercat 137
Features
- 5-click compression adjustment, tool-free.
- Aluminum reservoir shock: the remote-style reservoir keeps oil temperature down and damping consistent on long pulls.
- Fully rebuildable, serviceable shock. Len Performance rebuild kits and replacement parts are available.
- Hardened chromoly shaft for strength and seal life.
- Forged aluminum eyelet heads with premium steel and NBR bushings.
- Sold each.
Specifications
| Part number | 54-11000R (Len Performance LS4-11000R) |
| OEM part number replaced | 3704-252 (per distributor listings) |
| Shock location | Rear track shock (rear suspension) |
| Chassis / platform | Arctic Cat ProCross / Catalyst |
| Adjustments | Compression (5) |
| Length, extended | 386 mm / 15.2 in |
| Length, compressed | 264 mm / 10.4 in |
| Stroke | 122 mm / 4.8 in |
| Spring | None (uses the factory torsion springs) |
| Top eyelet | 14.3 mm ID x 24.8 mm wide (0.6 in x 1.0 in) |
| Bottom eyelet | 10.3 mm ID x 25.3 mm wide (0.4 in x 1.0 in) |
| Weight | 3.95 lb (6 lb shipping) |
| Includes | One shock |
| Rebuild kit | Len Performance rebuild kits available; call to confirm the kit number for this shock |
| Sold | Each |
Ordering and installation. Sold each. Ships from stock at our Anchorage shop, or from our distributor's Boise, Idaho warehouse when not on the shelf. In-store pickup is available at checkout. Installation and shock setup are available at A2D Motorsports; call (907) 306-3062 to schedule. Len Performance rebuild kits are available, so the shock can be serviced or re-valved rather than replaced.