Traxxion Dynamics / Omni Fork Spring Kit – Kawasaki Ninja 400 / Z400




The Traxxion Dynamics Fork Spring Kit includes two new Omni springs that are shorter and lighter weight than the OEM springs, and two new aluminum spacers cut to the proper length to replace the heavy steel OEM spacers.  This kit is a directly replacement for the OEM springs and spacers, no modification is necessary.

The Traxxion Dynamics Fork Spring Kit is an absolute necessity for anyone who intends to ride their Ninja 400 at a spirited pace and doesn’t want to invest in a full fork cartridge or damper rod kit.  Using proper springs for your weight and balancing the bike will completely change it’s handling and make the bike safer and more enjoyable to ride.  Fork springs are easy to install and inexpensive and make a world of difference in how the bike feels.

The OEM front fork springs in the Ninja 400 are progressive and can work okay for lighter weight riders.  For better handling and more consistent performance, use the spring rate chart here as a guide for our recommendations for the Kawasaki Ninja 400.

Additional information

Weight 1.5 lbs
Dimensions 12 × 4 × 2 in

.70 kg/mm, .725 kg/mm, .75 kg/mm, .775 kg/mm, .80 kg/mm, .825 kg/mm, .85 kg/mm, .875 kg/mm, .90 kg/mm, .925 kg/mm, .95 kg/mm, .975 kg/mm, 1.0 kg/mm


  1. misnblu (verified owner)

    If you’re not racing but want to setup your forks for your rider weight this is the way to go.

    Ingot the springs set for my weight, drained the factory 10 weight oil for some 15 weight and man let me tell you it’s a totally different bike now.

    Add the GSXR rear shock I’m the mix and you’ve got a budget track and good street bike to ride.

    ⭐⭐⭐⭐⭐ Rating

    • Jesse Norton

      Thanks for the awesome review and tips!

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