Fork Spring Preload / FSP & Fork Spring Kit / FSK


  Front spring preload kit (FSP/FSK) aluminum tubes with high-strength steel make large-pitch traveling range. 

This kit increases more loading capacity and reduces the spring weight.

FSP/FSK has 16mm adjustable pre-load traveling distance that allows rider to set their ideal parameters with on time in any condition.

Using high-performance rear shock, riders can easily reach their personal style, lightweight, fast, and balanced handling.




● Adjustable Spring Preload

  16mm adjustable pre-load travel, designed with scale mark on the side of adjustment bar.
  The rider can quickly and efficiently fine tune the harmonic balance between the front and rear suspension to achieve the desired settings for street or track.


 Ferrosilicon Chromium Spring

  The spring is constructed using ferrosilicon chromium steel (SAE9254)for a higher tensile strength over OE. The strong and durable ferrosilicon chromium spring allows us to make the pitch larger then reduce the overall coil count from OE, so turnout the spring lighter.


 Built-In Thrust Needle Roller Bearings (NTN)

  Preload adjusters utilize thrust needle roller bearings to helps reduce surface friction when adjusting preload.


 Light Weight Aluminum Tube

  Reinforced lightweight aluminum tube weighs significantlylighter than the OE factory tube.


 Easy Installation Without Oil Change

  FSP System can be installed without changing the front fork oil.

  But 15W or higher weight oilis recommended for optimal performance.



  FSP is covered by a 5 year limited warranty.
  If spring length decline of more than 5%, free for replacement.