99 YZ 125 Stock Valving Stack Specifications

[Street_Kleaver]

Hi guys, Trying find out the Fork & Shock Stock Shim stack arrangements for my 99 yz125/ 144 build.

Before I cut loose and open the forks and shock up, I'll be running it in and tuning/dyno before I touch the suspension.

I'm after specs on Both mid and cylinder/base on the 46mm KYB open chamber forks and the stack arrangement is on the rear shock.

And any problems/areas what can be addressed to make these old forks work well.

So far I can only get 01 stock valve stack specs. I've read that the rods changed from steel to alloy between 99 and 01. And apparently the 99 does NOT have the cylinder valve.

I have installed springs for my weight, .43 front (.41 stock) 4.8 rear (4.6 stock)


When I bought the bike :
Forks : Replaced the outer bush, new seals and new bottom bumpstops, the rest is un-touched and stock.
Shock :Fresh oil and gas. When it comes to opening that up again. I'll replace the seal head and bush when I come to re-valving it.

Its had 6 rides since, then I pulled it apart for the restoration.

Thanks for your help guys.

[Street_Kleaver]

Pulled my forks apart. Got a few warn parts. CV seal and bush is warn. Trying to hunt a replacement now.

Here are the specs if anyone wants them.

99 yz 125 fork.

Base valve.

Nut
25 x .40
Piston
24 x .10 (x9)
14 x .10
22 x .10
12 x .10
20 x .10
18 x .10 (seized on shaft, bent it getting it off)
16 x .10
14 x .10
12 x .10
18 x .50

Rebound
11 x .20 (x3)
14 x .10
16 x .10
18 x .10
20 x .15
12 x .15
27 x .10 (x4)

Mid Valve
27 x .10 (x4)
20 x .10
16 x .10
14 x .25 (x2)
25 x .40
11 x .30 Below spring collar.

Here's the 01 forks to compare.

2001 yz 125

Fork
24 x .10 (x13)
22 x .15
20 x .15
18 x .15
16 x .15
14 x .15
12 x .15
11 x .20

RB Fork
24 x .10 (x4)
12 x .10 (crossover shim)
20 x .10
18 x .10
16 x .10
14 x .10
11 x .20

Mid Valve

27 x .10 (x4)
20 x .10
16 x .10
14 x .30 (x2)
25 x .40
11 x .30 (x2) Below Spring Collar

[Coop]

Sorry for not getting a response. We don't have many suspension gurus on the site.

Thanks for taking the time to post that. Very helpful information.

[juliend]

I'm wanting to re-valve my 93 yz250 forks as well. I haven't pulled them apart yet, but I hope to sometime this fall.