Most modern motorbike forks have a damping cartridge sitting inside their outer tubes. The internal suspension oil can either be shared with the rest of the fork leg (open chamber), or can be separately sealed (closed chamber), and you can read more in our Closed vs Open Chamber Forks technical article.

At the top of the case you usually find the Compression Adjuster group with fork cap screwed in. Sliding up and down inside and sticking out the base you find the Cartridge Rod Assembly including the rebound adjuster components. Wrapped around the outside of the cartridge you find the spring perch and coil spring. If you need to adjust the preload on your fork springs try the spacers in our fork spring hardware section, and we also offer performance spring perches too.

We sell all the individual cylinders, tubes, inner seals, bushings and perches needed to rebuild your bike's front forks to brand new - plus we sell some amazing performance DIY adjustable fork cartridges.