2008 yz450f pressure springs

Does anyone know what the rating (kg) is for the stock pressure springs in the front fork of a 2008 yz 450f are?:thumbsup:

If you mean the "ICS", or free piston spring in the damper cartridge chamber, I believe they are 2.0 kg/mm.

I switched mine for 1.3's, and my son's for 1.7's, along with drilling the free piston and changing over to 251.VM2.K5 Suspension fluid from Dave Johnson at Smart Performance. I weigh 185, and my son, who is somewhat faster, weighs 190. The results have been somewhat amazing.

My review:


The free piston modification:


...and one reason you might want to do it:


Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now