EPIEPICA Cartridge Spring Conversion for WP XACT 48mm Husqvarna FC & TC (2022–2026)
Original price was: $1,980.00.$1,650.00Current price is: $1,650.00.
Available on backorder
The EPICA Cartridge Spring Conversion for WP XACT 48mm forks is a premium closed-cartridge suspension system designed for riders who want better front-end control, comfort, consistency, and tuning capability from their Husqvarna motocross bike. Developed by Lainer Suspension Racing in Italy, the EPICA system converts the OEM WP air fork into a fully tunable spring-based cartridge platform built for professional-level performance.
Designed specifically for 2022–2026 Husqvarna FC and TC models equipped with WP XACT 48mm forks, the EPICA Cartridge improves hydraulic consistency, front-end traction, damping sensitivity, and overall chassis stability. In addition, the system creates a more planted and connected feel through braking bumps, acceleration chop, rough terrain, and deep impacts.
Unlike traditional air fork systems, the EPICA spring conversion delivers more predictable performance during long motos and changing temperatures. As a result, riders experience improved confidence, better comfort, and more consistent suspension behavior throughout the ride.
At the core of the system is Lainer Suspension’s advanced bladder-style cartridge architecture combined with the Progressive Damping System (PDS). Together, these technologies improve oil compensation, damping control, and end-stroke resistance while maintaining excellent small-bump sensitivity.
Technology Overview
The EPICA Cartridge System was engineered to maximize suspension tunability while maintaining hydraulic stability and rider comfort across a wide range of riding conditions. The bladder-style cartridge design improves damping consistency while reducing hydraulic fade commonly associated with traditional internal spring systems. Additionally, the larger internal oil volume helps improve thermal stability and long-term performance consistency.
The cartridge includes externally adjustable compression damping, rebound damping, and spring preload adjustment. Therefore, riders and tuners can make meaningful setup changes without disassembling the fork. The reversible high-speed compression piston also allows tuning changes for motocross, supercross, off-road, and technical terrain applications.
In addition, the EPICA system integrates Lainer Suspension’s Progressive Damping System (PDS). This design increases hydraulic control near the end of the stroke, improving bottoming resistance and chassis stability during aggressive riding conditions.
Performance Benefits
- Converts WP XACT air forks to a spring-based cartridge system
- Improved front-end comfort and traction
- More predictable damping consistency during long motos
- Reduced harshness on braking bumps and chop
- Increased hydraulic stability compared to OEM air systems
- Enhanced bottoming resistance through Lainer PDS technology
- External preload adjustment from 0–15mm
- Wide external clicker adjustment range for precise tuning
- Increased tunability for motocross, supercross, off-road, and GP-style terrain
- Large-volume bladder cartridge architecture for improved damping consistency
- Reversible high-speed compression piston configuration
- Premium hard-anodized aerospace-grade alloy construction
- Designed and manufactured in Italy
Riding Applications
- Professional Motocross
- Professional Supercross
- GP and technical terrain
- Off-road racing
- Vet and amateur racing
- Enduro and cross-country riding
HUSQVARNA FC 250/350/450 2022-2026
HUSQVARNA TC 125/250 2022-2026
Bladder System
– Bladder system prevents performance loss that can occur with standard internal spring systems (due to hydraulic support decay).
– Internal oil compensation with increased volume for better high speed response.
– Ability to tune bladder pressures via the side bleed spring.
EPICA cartridge incorporates Lainer’s Progressive Damping System (PDS) for increased hydraulic damping at the end stroke.
– PDS system has up to 12 different adjustments for the end stroke stiffness.
High Speed compression piston is reversible with a large range of settings.
– Machined from premium 7075 and 6060 alloys and hard anodized.
– Reversible High Speed compression piston outer diameter = 38 mm.
– Side A (Flat valve surface) 34mm OD shims for motocross and enduro.
– Side B (Convex valve surface) 32mm OD shims for supercross
Option to configure Low Speed Valve (LSV) on compression base valve.
Cartridge rod diameter = 14 mm (for an increased oil flow).
Rebound piston diameter = 25mm for better hydraulic control.
Compression high/low speed shims ID 12 mm.
Maximum travel = 310 mm.
Maximum shim diameter for Mid-Valve By-pass = 21 mm.
Ability to set Mid-Valve float clearance with the stack shims.
Mid-Valve/By-pass floating shim ID = 6 mm (for a soft response at high speed on the braking bumps).
Rebound shims ID = 6 mm (uses delta mid-valve shims to avoid any oil turbulence on compression).
Low friction NBR bottom seal.
Ability to extend the cartridge through the nylon washers.
EPICA Cartridge Mounting Instructions
NOTE: A modification to the OEM lug is required to install this cartridge. The tool below is not required, however aids in the process.
EpIca Cartridge – Lug Fixture For Lathe
| Weight | 6 lbs |
|---|---|
| Dimensions | 44 × 6 × 4 in |
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