1990 kdx fork upgrade

[chriswill]

need some advice on forks please. ive got a 1990 kdx 200 which ive stripped and rebuilt, its a fantastic bike but im just not happy with the front end!!the forks have been stripped and rebuilt with heavier oil but they still bottom out under heavy riding ive set compression damping to max but no good,ive been told i can fit upside down forks to solve the problem but what will fit???

[Mr. Wibbens]

Start here

http://kdxrider.net/forums/viewforum.php?f=104

[SS109]

Start here

http://kdxrider.net/forums/viewforum.php?f=104

Yup!

[Mr. Wibbens]

And read read read!

[ldspowersports]

Lots of good info on here...an upgrade would be the 95 and up forks, or KX forks, or XR Springs...all the info is in that link! Good luck!

Luke

[Mr. Wibbens]

Lots of good info on here...an upgrade would be the 95 and up forks, or KX forks, or XR Springs...all the info is in that link! Good luck!

Luke

Not!

[ldspowersports]

I guess I should say a "budget" upgrade" with some XR springs....is that better??

[Indawoods]

H series forks are no better than your 91 E series forks.

So, either upgrading the springs to a higher rate or KX forks is the only improvements.

[kdxquebec]

I guess I should say a "budget" upgrade" with some XR springs....is that better??

I would say XR springs are the best BOING for the buck mod (40$) for your front end!

m0rie found them for me on thumpertalk classifieds. I think they are .40kg. Great improvement overall compared to the .29kg for the strockers. I love them, they eat whatever you put in front of them!

[michael]

I whacked some springs in myne out of the old mans 2000 XR400. Made a world of difference, It really did.

[ldspowersports]

I have personally never done it, but I would love to swap the KX forks soon.

[rbates9]

Indawoods
Site Admin


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Joined: 12 Jun 2003
Posts: 9605
Location: Midwest


Post subject: BEST OF THE BEST MODS!

First and foremost should be suspension upgrades.

On stock forks you should get springs that support your weight. Stock springs on a E series KDX are .32kg and stock springs on H series KDX's are .35kg. These forks on the different series KDX's are of different technologies but the H series springs are an upgrade to the E series springs and are usually the first step to getting the E series forks up to snuff. When I say E series I am not talking about the 93-94 USD forks. These forks require aftermarket springs I believe.
The shock should be serviced once a year. make sure the spring installed is for your weight. The stock spring is generally good to 180 pounds.

KX fork Conversion....

I personally believe the best fork modification for the KDX is a KX fork conversion. The benefits are newer technology through rebound and compression settings, less underhang and better control through less flex. It is believed that and KX forks 96 and up are the best upgrade. All of these can be made to work very well with only modest modifications. A KX 500 front end is a direct replacement for the KDX so this will require almost no modification to work and many people look for these to ease installation. More information is posted in the Fork Conversion Forum.
*** Administrator //***
****'95 KDX 200/****

"People ate cows a thousand years ago for the same reason we eat them now. Cause they are easy to catch.We're not savages,we're just lazy. A cheetah could taste like chocolate heroin. But will never know. Those bastards are fast!!! "

Last edited by Indawoods on 09:00 am Oct 09 2009; edited 2 times in total



Hmmmm.

[Indawoods]

What's Hmmmmm.... Out with it man.

[rbates9]

>|<>QBB<

H series forks are no better than your 91 E series forks.

So, either upgrading the springs to a higher rate or KX forks is the only improvements.

Seems as tho you have conflicting opinions.

[Indawoods]

I don't think so at all... upgrade the springs! So what if they are different technology... they both are subpar IMO.

Where is the conflict?

[rbates9]

Agreed, yes they are both subpar. But if he put on a set of H forks would they not have stiffer springs making them an improvement over the E forks. And if they are of different technology did they make the H more primitive or mabe just a little better? The question I saw at the top of the post was looking for options not just the best upgrade.

[Indawoods]

No... The E series forks are the equivalent to H series forks in stock form.

By increasing the spring rate in the E series, it makes them better than stock H forks with stock springs.

When I had my 92, this is the first upgrade I did. It made it rideable at that point.

[Mr. Wibbens]

Seems like the H forks are not as stout as the E's

[rbates9]

>|<>QBB<

No... The E series forks are the equivalent to H series forks in stock form.

By increasing the spring rate in the E series, it makes them better than stock H forks with stock springs.

When I had my 92, this is the first upgrade I did. It made it rideable at that point.

Stock springs on a E series KDX are .32kg and stock springs on H series KDX's are .35kg. These forks on the different series KDX's are of different technologies but the H series springs are an upgrade to the E series springs and are usually the first step to getting the E series forks up to snuff.


?

[Indawoods]

Right....