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.