FOX 34 Topcap Factory FIT4 Remote 3-Position U-Cup (Push to Lock) Service Kit
820-05-580-KIT - FOX Service Set: 2020 34 FIT4 FS Topcap Assy
Complete Topcap Assembly service kit for FOX 34 forks with FIT4 system (Factory Series) from model year 2020.
This service set is intended for replacing the upper part of the FIT4 damping cartridge, which is designed for remote control. The kit includes a complete top plug assembly including a U-ring (U-Cup) for a perfect seal of the damping cartridge. This replacement is ideal in cases where there is oil leakage around the control mechanism or reduced functionality of switching between the individual modes of the 3-position system.
Main features and benefits:
Specific Compatibility: The kit is optimized for model year 2020+ and FOX 34 Factory Series forks with FIT4 cartridge.
Remote Control: Components are designed for seamless integration with handlebar remote controls.
Precision Sealing: Includes a U-ring that maintains hydraulic pressure in the cartridge and prevents oil leaks during aggressive use.
Restore functionality: Resolves issues with "dirty" position switching (Open, Medium, Firm) and restores smooth operation of the control mechanism.
Technical specifications:
Product code (MPN): 820-05-580-KIT
Purpose: Damper cartridge top cap service kit (Topcap Assembly).
Compatibility: FOX 34 Factory Series (FIT4, model year 2020+) forks, Remote version.
Recommendation: When replacing the top cap (Topcap), ensure absolute cleanliness so that no dirt gets inside the FIT4 cartridge, which could damage the sensitive valves. Lightly lubricate the U-ring seal with shock absorber oil before installation. After assembly, check that the control mechanism moves smoothly and that all three positions (Open, Medium, Firm) are clearly defined. If you are using a remote control, make sure the cable and the cable have the correct tension and are not under unnecessary strain, which could lead to incomplete damping. The package includes a complete top cap assembly. If you are converting a fork from manual control to a lever, make sure you also have a compatible 3-position control lever and the appropriate Bowden cable.
| product ID | 385749 |
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