Spears Racing Kawasaki Ninja 400cc/Z400 "Wurx" Clutch Kit
Kawasaki Ninja EX400/Z400 Racing Clutch Fiber/Spring Kit/Gasket 2018/Current - Image 2
Kawasaki Ninja EX400/Z400 Racing Clutch Fiber/Spring Kit/Gasket 2018/Current - Image 3
Kawasaki Ninja EX400/Z400 Racing Clutch Fiber/Spring Kit/Gasket 2018/Current - Image 4
Kawasaki Ninja EX400/Z400 Racing Clutch Fiber/Spring Kit/Gasket 2018/Current - Image 5
Kawasaki Ninja EX400/Z400 Racing Clutch Fiber/Spring Kit/Gasket 2018/Current - Image 6

Kawasaki Ninja EX400/Z400 Racing Clutch Fiber/Spring Kit/Gasket 2018/Current

These clutch kit for 2018/current kawasaki ninja 400 friction plates come to you the end user after decades of research and development both on and off the race track, constantly striving to offer the best possible friction material for your motorcycle .

Unlike any other clutch sold for this bike this is a  Japanese manufacturer racing clutch kit.Most of the other clutches sold for this bike are made in a third world country (OEM Kawasaki)  and it will not last.

The kit has a 20% increased clutch surface area which mean more surface area +less wear, slippage and better high performance durability.

$39.99 – $199.99

SKU SP34-400-2 Categories , , , Tags ,

Description

Spears Racing Kawasaki Ninja 400cc/Z400 “Wurx” Clutch Kit
For decades, Spears Racing has led the way in creating high-performance products for commuter-style motorcycles like the Kawasaki Ninja 400cc/Z400, transforming them into race-ready machines. Our “Wurx” Clutch Kit, designed for 2018 and newer Kawasaki EX400/Z400 models, combines cutting-edge Japanese-made friction plates, USA-engineered “Wurx” clutch springs, and a reusable clutch cover gasket for unmatched performance and durability.
Why Choose the Spears Racing Kawasaki Ninja 400cc/Z400 “Wurx” Clutch Kit?
The stock Kawasaki Ninja EX400/Z400 clutch is built for commuting, not racing. Under race conditions, it can slip or fail, leaving you stranded. Our “Wurx” Clutch Kit is engineered to deliver superior control, eliminate slippage, and withstand the demands of track days, club racing, and professional competitions like WSSP 300, BSB Junior Teams, CSBK, and Moto America.
Kit Components and Features
1. Japanese-Made Racing Friction Plates
  • 20% More Surface Area: Reduces wear, minimizes slippage, and enhances durability for high-performance racing.
  • CNC-Machined 6061-T Aluminum Cores: Increases drive tab width for better wear resistance and minimal impact on clutch baskets (weighs only 125 grams).
  • Non-OEM Design: Crafted by a world-leading manufacturer of racing clutch and brake components.
  • Race-Proven: Developed through decades of on- and off-track research for optimal friction material.
2. Spears Racing “Wurx” Clutch Springs
  • Heavy-Duty Performance: Designed and manufactured in the USA for precise launches and no-slip performance at race pace.
  • Enhanced Pressure: Reduces high-RPM slippage compared to stock OEM springs.
  • Race-Tested Durability: Pre-set, shot-peened, and heat-treated for reliability, trusted by track day riders to world-level race teams.
3. Reusable Clutch Cover Gasket
  • Advanced AFM Material: Chemically blown nitrile synthetic rubber bonded to an aluminum core, with 85% shape recovery and torque retention.
  • High-Temperature Resistance: Withstands over 2500°F without requiring sealers or re-tightening.
  • Easy Maintenance: Non-stick design eliminates scraping during replacement, ensuring a superior seal and no oil seepage.
  • Built for Performance: Used by engine builders and factory race teams worldwide, designed with state-of-the-art software and manufacturing processes.
Key Benefits
  • Race-Ready Reliability: Eliminates clutch failure and slippage, even under extreme racing conditions.
  • Global Trust: Used by WSSP 300, BSB Junior Teams, CSBK, Moto America, and club racers worldwide.
  • Made in the USA: Clutch springs and gaskets are proudly designed and manufactured in the USA for top quality.
  • Long-Lasting Design: Reusable gasket and durable friction plates reduce maintenance costs and downtime.
Upgrade Your Kawasaki Ninja 400cc/Z400 Today
Spears Racing Kawasaki Ninja 400cc/Z400 “Wurx” Clutch Kits is the ultimate solution for transforming your Kawasaki EX400/Z400 into a high-performance racing machine. Built with precision, tested on the track, and trusted by racers worldwide, this kit ensures your bike performs at its best when it matters most.
Made in the USA and Japan with pride.

 

 

Additional information

Weight 1.0 lbs
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