02-04 yz250 suspension

BryceJefferson33j
Edited Date/Time 1/4/2020 1:07pm
What is your opinion on the suspension on these bikes? if I did the fork conversion from a yzf would that work ok with the shock or should i get the newer style shock. What all would the suspension swap entail, just pressing bearings on the clamps for the front end right? what about an 06+ yzf shock how would that work? Also what bearings do you use on the 06+ clamps?
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BryceJefferson33j 1/3/2020 4:07pm
1/3/2020 4:07pm
Also how does the stock 03' suspension compare to what comes on a cr,kx or rm. Just to get an idea
Kristen_Valentino 1/3/2020 4:10pm
1/3/2020 4:10pm
Need sss forks, triple clamps and caliper bracket also, if I remember you have to use your steering stem pressed into new clamps, your forks now can be made to work fairly well, ask yourself what are you really looking to gain, there is many good suspension places out there, might be cheaper to make those forks work than doing a whole swap
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m21racing
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m21racing 1/3/2020 8:21pm
1/3/2020 8:21pm
You can tune those oc forks, sub tanks help.
UGOTBIT
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UGOTBIT 1/4/2020 9:11am
1/4/2020 9:11am
My experience with the 46’s-

I went the Race Tech route, sprung correctly and installed gold valves. I also installed the cartridge/cylinder valve kit.

The CV block off kit added stiction to the forks. Speaking with Terry Hay, now I would just remove the “guts” from the stock CV and block off that way.

I have had major issues with blowing through the stroke, what these forks are known for. I added oil and sub-tanks, it helped very little, I believe a lot of the problem is in the mid-valve. To be 100% honest, this was the end of the season So I didn’t get much time to play with them.

RT has no suggestions or setting for the mid valve, and there is not a lot of info out there on them at this point. Everyone has abandoned them for the newer SSS stuff.

I spoke with Dave at Smart performance, he had a set up for the mid valve I was going to use, but I actually found a set of SSS forks for cheap locally so I picked them up.

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m21racing
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m21racing 1/4/2020 9:22am
1/4/2020 9:22am Edited Date/Time 1/4/2020 9:23am
UGOTBIT wrote:
My experience with the 46’s- I went the Race Tech route, sprung correctly and installed gold valves. I also installed the cartridge/cylinder valve kit. The CV...
My experience with the 46’s-

I went the Race Tech route, sprung correctly and installed gold valves. I also installed the cartridge/cylinder valve kit.

The CV block off kit added stiction to the forks. Speaking with Terry Hay, now I would just remove the “guts” from the stock CV and block off that way.

I have had major issues with blowing through the stroke, what these forks are known for. I added oil and sub-tanks, it helped very little, I believe a lot of the problem is in the mid-valve. To be 100% honest, this was the end of the season So I didn’t get much time to play with them.

RT has no suggestions or setting for the mid valve, and there is not a lot of info out there on them at this point. Everyone has abandoned them for the newer SSS stuff.

I spoke with Dave at Smart performance, he had a set up for the mid valve I was going to use, but I actually found a set of SSS forks for cheap locally so I picked them up.
I had a set of 99 forks, and ran a clamped mid. They worked well, but the cylinder valve was added later. That seemed an issue for the forks. Removing it as terry suggested would be a good start, then finding a better mv. If i remember right they run the larger id shims, and you may be able to machine up some parts to run a more conventional mid.i did sub tanks with the clamped mid, and ran like 125-135mm of oil. They worked pretty well for my old yz250. The sss forks are obviously the choice, but I would assume you could find some cheap air forks, all the transplants we've done have worked well on 2t bikes.
UGOTBIT
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UGOTBIT 1/4/2020 12:08pm
1/4/2020 12:08pm Edited Date/Time 1/4/2020 1:07pm
I was under the impression the clamped mid was more geared for off road type riding, not MX. I did have someone suggest to run a clamped mid, but I didn’t get around to trying anything.

Here’s a picture of the CV deletes that Terry used to offer, again when I contacted him last season about a set he said he no longer produces them, But gave info about how to disable the stock units.






Probably worth mentioning the 04 YZ250 had 48mm open chambers, supposedly much Improved over the 46’s

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