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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
03 YZ250 Forks
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[QUOTE="SpectraSVT, post: 675535, member: 30250"] I only had midstroke harshness when the bike was set stiff but it would still blow through the stroke on hard landings. So I had to pretty much set it way stiff to avoid it. If I rode trails I wouldn't have to worry about bottoming and I personally thought the forks were way plush. I just couldn't have both. Now that the midstroke spike is gone I can plush it out again. From what I understand the midvalve was a stack of shims that were stiff and don't give under small loads like chop or braking bumps. These types of things don't apply enuff pressure for the midvalve to open. Because its not opening you feel every little bump. But under extreme pressure the shim would break away suddenly. As you keep riding, these shims get weaker and it gets worse. You end up blowing thru the stroke so fast its as if there was no resistance. What my buddy did was make it a progressive stack so it has it own support system that allows it to open slightly on chop but still be strong enuff to withstand a heavy blow. With the extra support it won't weaken like the stock setup would. And it allows the mid valve to give a little in the chop. This is a elementary explanation. He explains things to me but I don't get all of it so not sure how well this comes across. Adding shims to the bottom (base valve) will only make the forks stiffer thru the whole range. It will resist bottoming better but only make the midvalve harshness standout even more. Thats why I am having the extra shims he put in taken out of the base valve 2morrow. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
03 YZ250 Forks
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