What exactly is a shim stack? Long story short. Previous owner of my '05wr450 sent the bike to a supension shop to be adjusted to his weight (225) and off road riding style. They added heavier springs and gold valves. Then he decided to try MX racing and sent it back to the supension shop and they did something to the shim stack to stiffen it up. He then sold it to me and bought a YZF. I have had the bike for about six months and ride it all the time. I weigh about 205 and ride a lot of single track and dual sport it as well (did I mention it's plated). I believe it to be very stiff for what I use it for. Some of the symptoms are; front end washes out from braking or cliping rocks then quickly replants (kinda scary), when hillclimbing up rocky, shelflike banks, it doesn't absorb the bumps but bounces off and sends the bike into a harsh redirection or a wheelie. I have played with the clickers and improved it but I think I need to undo the shim stack adjustment at a minimum. I looked in my owners manual and don't see anything called a shim stack. Another post I read said the WR's don't have shim stacks. Were these added to make the forks YZ like? I'm a decent mechanic and on a limited budget. Is this something I can do myself?