Len Performance Front Track (Center) Shock, Ski-Doo Expedition / Expedition Xtreme 2016–2025 (54-80003F)
Len Performance Front Track (Center) Shock, Ski-Doo Expedition / Expedition Xtreme 2016–2025 (54-80003F)
Len Performance
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Product details
Len Performance LS4-80003F rebuildable front track shock, also called the center shock, for the rear suspension on the Ski-Doo Expedition 600 HO (2016–2018), Expedition Xtreme 800R E-TEC (2016–2019), Expedition Xtreme 850 E-TEC (2020–2025) and Expedition Xtreme 900 ACE Turbo R (2023–2025). It replaces the factory front track shock with a coil-over reservoir shock. At $452.95 each, it is A2D's value pick for a rebuildable, adjustable reservoir front track shock: clicker adjustment, a reservoir and a serviceable design without the cost of a race-level shock.
The front track shock controls how the skid loads under acceleration, how the sled transfers weight with a passenger or cargo on board and how much ski pressure you keep when you get on the throttle. 5-click compression adjustment and threaded preload rings let it be set for the load and the conditions instead of running fixed factory valving.
Fitment. Sold each. Ski-Doo Expedition only; despite the distributor's "SD / Lynx" description, Len's lookup lists no Lynx model for this part. Pairs with the Len Performance 54-80003R rear track shock for a complete rear suspension (Len Performance kit LS4-80003K). Matching ski shock: 54-80002. Platform: Ski-Doo REV-XU (2016–2019) and REV Gen4 wide-body (2020–2025).
Fitment list (Len Performance year/model lookup)
- Expedition: 2016-2018 Expedition 600 HO; 2016-2019 Expedition Xtreme 800R E-TEC; 2020-2025 Expedition Xtreme 850 E-TEC; 2023-2025 Expedition Xtreme 900 ACE Turbo R
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.
- Powder-coated spring resists corrosion and holds rate in cold, wet conditions.
- Threaded shock body with anodized dual-ring locking preload adjusters: set sag once and it stays set.
- Sold each.
Specifications
| Part number | 54-80003F (Len Performance LS4-80003F) |
| OEM part number replaced | 503194337 (per distributor listings) |
| Shock location | Front track shock / center shock (rear suspension) |
| Chassis / platform | Ski-Doo REV-XU / REV Gen4 wide-body |
| Adjustments | Compression (5), plus threaded spring preload |
| Length, extended | 330 mm / 13 in |
| Length, compressed | 230 mm / 9.06 in |
| Stroke | 100 mm / 3.94 in |
| Spring | Powder-coated coil spring included, 65 mm / 2.56 in diameter |
| Top eyelet | 10 mm ID x 29.5 mm wide (0.4 in x 1.17 in) |
| Bottom eyelet | 18 mm ID x 26.5 mm wide (0.71 in x 1.05 in) |
| Weight | 4.74 lb |
| 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.