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Race tech spring rate suggestions?

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Ok I am going to revalve my suspension on my 04 YZ 250F. I was doing some spring rate search over at race tech's website and the reccommended spring rate for the forks is a .435 and the stock spring rate is .430. Is that close enough to where I wont notice a difference?

On the shock they reccomended a spring rate of 4.92 and the stock rate is 4.7. Now I noticed a little bottoming from the stock shock but I went a half turn on the high speed compression(I think) and it seemed to fix it. Will I notice a huge difference going with stiffer spring? Or will I be ok with the stock spring?

I planned on just buying the gold valves(type 1), but was thinking, would replacing the seals and bushings make a noticible differance also? Also in case you were wondering I am about 170 lbs with gear off but I entered 175 lbs just in case I have a big meal before I ride or something. So thats how all the spring rates were measured.

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I have gold valves and not a big fan of them.I heard they elimadate the mid valve not sure.But with gold valve my bike seems to be soft a mussy.Just my opinion.I wish i would have just got a stiffer spring because revalve parts and labor 200 dollars and doesent seem any better than stock with right spring. :cry:

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As a 170 lb mx'er, you are very close to what the bike was originally set up for. I think that in your case, gold valves would worsen your suspension until you pulled them apart several times for tuning.

If you want to learn about suspension re-valving though, they are great. If you just want good suspension, stick with stock or a re-valve from a quality shop.

I put gold valves in my yz250f. The shock worked pretty well right away, but I had too re-valve the forks at least 10 times before I was finally satisfied. The forks never worked right until I put the mid-valve back in and used a softer base valving. :cry:

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Well I didnt expect to see those responses for the gold valves. I thought KYB worked well with gold valves. I knew showa did but seems like you guys had problems. Maybe it would be better if I went with the type 2 gold valves instead of the standard. They are the same price but the type 2 is for aggressive motocross supercross applications and reduces bottoming. What do you guys think or, do you have any recommendations on who I should go to besides racetech? Also I would like to know if you were over or under the reccomended spring rates that racetech suggested.

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I just got a brand new Kx 100, and I could use some suggestions as to how to set the suspension, since I have no idea how to adjust it. Any help is appreciated, thanks.

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Hey skinsfan I could give you a hand on a couple things. First I need to know your weight and year bike. Im assumming its 05 but maybe its 04. I can look up the spring rates and see what they are and see whats reccommended for your weight. Also tell me what you didnt like and liked about the suspension.

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Thanks for the help. I weigh about 140. Its a year 2005 KX100. And I just felt like it was a little too soft. Like when it was on the bike stand. I could pick up the back end it actually came up through part of the stroke. Thanks a whole lot. You meet the nicest people on a dirt bike.And sometimes the meanest too.

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I personally have been satisfied by the GV in the shock, in the fork it's a different matter because you have separate valves on each side of a cartridge. The base valve on the bottom, and the mid-valve on top.

Race Tech recommends removing the midvalve and installing a check-plate, which is just a washer on a spring that opens up, letting the oil pass through. This really softens up the valving and takes away harshnes, but it's about as sophisticated as drilling a couple of quarter-inch holes in the side of your cartridge. Race Tech recommends it because it's much easier for amatuers to adjust their valving when they only have 1 valve to work with. Plus it gives them a base-line to start all their recomendations on.

As an amatuer who needs simplicity, I've had the best luck with the forks I've re-valved by just leaving the mi-valve stock, and starting with race tech's "prefers soft" settings on the base. (because a mid-valve adds allot of damping compared to a check-plate.) This way I have a good, working mid-valve, and only have to think about tuning the base. It's a decent compromise that works for novices like myself. I picked it up from some of the experts on this forum, who believe that the stock mid-valves are pretty good these days for the typical rider. Good luck in your quest :cry:

P.S. Their is allot you can do with the mid-valve and how much it "floats", but small changes make a huge difference and throw off everything you've done to the base.

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Hey Skinsfan6 I will post tomorrow with the results. Like another guy said Racetech's spring rate calculator was down so I will check again. Also I found out my next door neighbor ravalved his front and rear on his yz 250. He didnt tell me but I noticed he was going a little faster thru the rough stuff. I am going to ride his bike when I get a chance and see how I like it.

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The Race Tech spring calculator / product search page is up again. They switched to the old style. In the past couple of days when it was down, I was able to access this older style interface by clicking on "DVS valving search", which is right below the product search link.

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