About the Product

Öhlins FKS Supersport Front Fork Cartridge Kit

Kawasaki Ninja 400 (2018–Present)

Race-Derived Suspension Performance for Lightweight Supersport Riders

Upgrade the handling and front-end confidence of your Kawasaki Ninja 400 with the Öhlins FKS Supersport Front Fork Cartridge Kit. Developed from decades of Öhlins racing experience, this cartridge system delivers stable damping performance, improved comfort, and significantly enhanced rider control — transforming the Ninja 400 into a true track-capable machine.

Designed specifically for the Ninja 400 platform, this kit replaces the stock fork internals with precision Öhlins components engineered to provide consistent damping characteristics and predictable handling across street and track conditions. The result is improved braking stability, sharper steering response, and increased rider confidence at every pace.

Performance Benefits

• Improved front-end stability and control

• Reduced fork dive during hard braking

• Increased front tire grip and feedback

• Smoother suspension response over bumps

• Greater confidence entering and exiting corners

• Race-inspired performance while maintaining ride comfort

Advanced Öhlins Technology

FKS Supersport Cartridge Design
Developed using knowledge gained from top-tier racing programs, delivering stable damping characteristics and precise suspension control.

NIX Damping Architecture
Compression damping operates in one fork leg while rebound damping operates in the other, improving damping accuracy and chassis balance.

Full External Adjustability
Compression, rebound, and spring preload adjustments are located at the top caps for easy and precise tuning.

Bike-Specific Development
Each cartridge kit is engineered and tested specifically for the Ninja 400 chassis to optimize performance and rideability.

Drop-In Installation
Designed to fit inside the original fork legs without modifying external geometry.

Key Features

• Öhlins FKS Supersport cartridge technology

• NIX-style separated compression and rebound damping

• External preload, compression, and rebound adjusters

• Stable and consistent damping performance

• Improved braking support and rider feedback

• Precision CNC-machined internal components

• Fully serviceable and rebuildable design

Technical Specifications

Ideal For

• Track-day riders and lightweight supersport racers

• Ninja 400 race builds and performance upgrades

• Riders upgrading non-adjustable OEM forks

• Riders seeking improved confidence and handling precision

Installation Notes

Professional installation is recommended. Proper spring rate selection based on rider weight and riding style is essential to achieve optimal suspension performance.