Motorcycle Fork Inner Chamber Springs

If your motorbike has modern "Separate Function Forks", you probably have a comp adjustment clicker on one top cap & reb on the other, but for many adjustable designs both caps have compression damping adjusters - learn more about open or closed chamber front forks. If you've never adjusted your dampers, read our clickers article - they're like opening or closing a tap for more or less suspension oil to flow.

Adjuster assemblies are compact but complex, a top cap at it's head & centre shaft screwed underneath.

A free piston slides up & down that center rod inside oil forks, with one of these Inner Chamber Springs pressing between top cap & sliding piston. It sets initial fork plushness - changing the ICS rate will make the forks softer or firmer at the beginning of the stroke. Air forks have a similar PSF Balance Spring.

The upper cap has a clicker assembly & a bleed screw on its face, sealed against the fork tube with an o-ring. The floating piston has inner & outer seals plus bushes to prevent oil getting past.

At the end of the center rod are the comp valving piston parts - a specific set of shims & washers assembled either side of a piston and locked onto a base valve "tower" with a locknut. A pushrod slides inside the centre shaft, pressing harder or softer on the valves depending on your clicker adjustments, compressing or loosening the stack.

If you can't find what you are after, we have a collection of small clicker parts in our Fork Adjuster Parts category - plus we have some great aftermarket parts for comp assemblies like clicker knobs and super strong billet alloy free pistons.