KDXRIDER.NET

Just got a 2003 KX 125 front end to swap on to my 2000 KDX 220. Anybody know which years will fit it for wheel/hub/axle assmebly? I'll be using my KDX brake set-up. Is knurling required? Also, what revalve/spring mods are recomended? Are there bladders that need to be removed? I'm 5'7" 170 and I ride very tight, muddy woods most of the time. Thanks for any help!

I can tell you the forks will need re valving, go one lighter on the fork springs
the the spring rate calculator will call for .42 fork springs I would recommend
.40 from experience the KDX just responds better to a softer front end.

I also have a KX250 with .42 fork springs and it works and feels fine but the
.42s in the KDX and it was a jitter bug.

just my humble Opinion.

Matt

At 170 I'd be tempted to go with .38 springs. I am 215 and have .42's in my 03 KX 125 forks and they are stiff! If course that may change when I revalve them (remove 2-4 of the largest shims in each valve).

Mine did require knurling....

I have '03 KX forks on my '05 KDX. I didn't have to knurl. We just pressed out and pressed in. Didn't use any Loctite pressfit goop or anything. I used the KX steering stem nut as a spacer then used some shim stock around the top of the stem inside the top KX triple clamp. I bought the shim stock at Hobby Lobby. It was basically a small sheet of very thin aluminum. I cut it to the right size and then bent it around the stem until it slid down into the top triple clamp hole nicely. Very easy really. I also posted some pictures of how I re-mounted my headlight in the furoms.

Thanks guys! Krazyinski, did you use shim stock as well? Is a custom bushing a better idea? Where can I get fork springs? You guys left the valving stock and just changed springs? Anybody know what year wheel assemblies will fit the 2003 forks?

rdsrf wrote:Thanks guys! Krazyinski, did you use shim stock as well? Is a custom bushing a better idea? Where can I get fork springs? You guys left the valving stock and just changed springs? Anybody know what year wheel assemblies will fit the 2003 forks?

I think MonkeyButt has the best price on race tech springs.
Also check out India's post on KYB's and look at the section
for the mid valve conversion.

http://www.kdxrider.net/forums/viewtopic.php?t=478
Race Tech also recommends this conversion.

*Note* Check the out side diameter of the fork tubes before you buy parts
46mm 2001 and older/ 48mm 2002 and newer

I used shim stock never had any problem. I do think they will perform much better with the correct valving and shims for your riding conditions.

krazyinski wrote:I used shim stock never had any problem. I do think they will perform much better with the correct valving and shims for your riding conditions.

TWMOODY,

I got the 2001 KX 125 forks and I have a 2004 KDX 220R - you mentioned the size of the 2001 and older being a smaller diameter - is this a problem?

You will need to buy for the 2001 kx which should be 46MM.
The 48mm's will not fit.
Measure the size of the fork tubes BEFORE you buy.