Took my forks apart, 2001 KX125 valving advice

Questions and comments about converting to beefier forks..
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strider80
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Took my forks apart, 2001 KX125 valving advice

Post by strider80 »

Got bored of writing a grad school paper today and decided to do something fun, like revalve my forks! These are 2001 KX125 forks from my 2000 KDX200.
Here is the stock valving in the base valve:

nut
cup
spring
sleeve
thick washer 25x.4mm
piston
24 X7
22
20
18
16
14
12
11
18 x2 thick
15 x2
18
25 x2

I am confused by the shims after the 11, they don't seem to match other setups I have read about. What do they do? Regulate the flow through the bleeder? I am going to remove all but 4 of the 24's and leave the rest alone. Any other suggestions?

I am going to remove the bladders (and mod the RB) and look at the midvalve next.

Cartridge:

nut
thick washer
18 thick
11 x3
13
16
21
15
23 x 2
piston
26 x3
24
22
20
18
16
collar
15 thick
16 x2
16 thick
12

Now I am clueless on the midvalve, none of the numbers are similar to what Bradf's doc says, maybe that just means his setup is fairly custom.
2005 KTM 250EXC
2000 KDX200 (gone)
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scheckaet
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Post by scheckaet »

check my profile, I have the same fork.
http://www.kdxrider.net/forums/viewtopic.php?t=3270
So far it seems to work pretty good for me (170 lb w/o gear)
I tried to match Bradf setup as close as I could (some shims were missing from stock).

Hope this help.
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strider80
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Post by strider80 »

What were your stock stacks?

I am missing the "bleeder" shim in the midvalve, not sure what is up with that. what about the shims on lower side of the 11's in the basevalve?
2005 KTM 250EXC
2000 KDX200 (gone)
Matt-itude
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Post by Matt-itude »

the way i understand it is that they act as a 11 diameter shim of the same thickness because that is all the surface area contacts is the 11 diameter. so basically just used to take up space.
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scheckaet
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Post by scheckaet »

This is what was there for stock, and obviously was already custumized for the previous owner.

Base Valve, LSC:
nut
cup
spring
washer sleeve
piston
17 (removed now)
24 x 4
22
20
18
16
14
11
thick spacer

cartridge:
HS Rebound
nut
thick washer
11
14
17
20
13
23 x 3

piston
HSC
20
25 x 4
22
20
17
shim missing
12

LS Rebound
15
shim missing
17
20
22
25
20
o ring
cup
rod
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strider80
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Post by strider80 »

I also don't have an o-ring or cup on the midvalve.

What about the 25mm shims on the bottom of the basevalve stack? It looks like they restrict the bypass flow.
2005 KTM 250EXC
2000 KDX200 (gone)
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strider80
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Post by strider80 »

Well if you are still running stock valving in your KX forks, revalve them. I did mine last week and rode on them this weekend. Night and day difference from the stockish valving I had. I don't cringe before hitting rocks and roots anymore, way more comfortable.

I took out 3 24's from the basevalve, the midvalve is still a work in progress since I was missing some parts from it. Check my bike profile for my valving setup.
2005 KTM 250EXC
2000 KDX200 (gone)
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