FOX Street Performance Series Fork Cartridge Kit - 41mm — Harley-Davidson Electra Glide Classic, Electra Glide Ultra Classic, Road King (1986-2013)

FOX Street Performance Series fork cartridge kit for 41mm forks on V-twin motorcycles, engineered to drop into existing forks without cosmetic changes. Speed-sensitive damping and linear spring rates deliver improved comfort and cornering control while reducing brake dive.

Features

• Speed-sensitive closed cartridge damping
• Model-specific ride tune
• Linear spring rates reduce brake dive
• Works with existing fork tubes and seals
• Fully rebuildable and re-valvable
• Maintains original fork appearance

Specifications

• Brand: FOX
• Manufacturer Part #: 890-27-004
• UPC: 788000424445
• Fork Diameter: 41mm
• Length: 28.81 in
• Width: 12.25 in
• Height: 4.87 in
• Weight: 8.5 lbs
• Country of Origin: China (Taiwan)

Fitment

Fits 41mm fork tubes on V-twin motorcycles, including Harley-Davidson and Indian Motorcycle models with compatible fork geometry.

Frequently Asked Questions

Will this cartridge fit my existing fork tubes?

Yes — this kit installs inside your current 41mm fork tubes without requiring new tubes or cosmetic changes to the fork.

Do I need to revalve this cartridge?

Out of the box, it comes model-tuned and ready to ride. It is fully re-valvable if you want to customize damping later.

What's the main benefit over stock damping?

Speed-sensitive damping and linear spring rates improve rider comfort, cornering control, and reduce unwanted brake dive under deceleration.

Is professional installation required?

Fork cartridge installation requires disassembly of the fork leg and oil changes. Most riders have this done by a qualified suspension shop.

Can I service or rebuild this cartridge myself?

Yes — the cartridge is fully rebuildable and re-valvable, though professional service is recommended for optimal results.