Have any of you any experience about progresive springs in your forks?

I have just changes my front springs, and put in progresive springs. The result is a very different bike!

IMO the bike has become more flikable, but is has lost some of it's stability, and at lowish speeds
(40-50 mph)it's difficult to "fell the front end".

I don't know if this is just me, or have any of you had the same experience ???

 

Have you got the fork leg internals cleaned up? The phenomena you describe sounds as there may be dirt and contaminations in the shim stack, so the fork dampening does not work OK. I use progressive springs on both the GSX R and the Bird and have no problems with this. They ride soft over small bumps and resist fork bottoming during hard braking. The general consensus is that linear springs are better for track use and the progressive may match road variations better. Modern sport bikes are equipped with progressive fork springs from the factory, and they perform very well both inslow and high-speed corners.