Motorcycle Fork Compression Free Piston Centre Shafts

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, with everything revolving around one of these genuine factory KYB & Showa suspension threaded hollow centre rods.
These guide shafts act as a backbone, with the upper cover cap screwed up top, comp valving piston & shim base tower attached to the bottom end, a free piston & Inner Chamber Spring sliding up & down over it, and the inner adjuster pushrod inside it, compressing or loosening the valve stack.

The top cap is sealed against the fork tube using an o-ring, with a clicker assembly & bleed screw inside. The floating piston has inner & outer seals plus bushes to prevent oil getting past. The ICS presses between the two - helping set the initial fork plushness - so changing spring rate will make the forks feel softer or firmer at the beginning of the stroke.

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. For people looking to tune beyond the OEM valving we carry revalving kits to push your performance to the next level!