82 replies to this topic

[Family Man TT Gold Member]

I have a 2005 rm 250 with 2005 rmz450 internals, both base valves and damper valving are from a 2005 rmz450. I would like to revalve it for my 2005 rm 250. Im a fast novice, borderline intermediate MX rider and intermediate offroad rider. 172 pounds. I want to valve for intermediate motocross.  Ive read that people reccomend fliping the bleed stack? are they talking base valve or damper rod? Do any of you have pics or a diagrams of it, where is it? I have an extra set of base valves off an 05 rmz450, so I was thinking about revalving them first since there out of the bike. Not sure if they have been revalved before. I removed the nuts on the compression dampers, they unscrewed with minimal force. but they unwound a few of the mail threads, Im thinking it not a big deal as the threads are past the nut when tightened. maybee there there to be peened?
The Shock feels really good and planted and predictable most of the time so I want to focus on the forks.

Edited by Family Man, 10 July 2012 - 04:57 PM.

[no hand TT Silver Member]

The bleed stack is under the basevalve. You will see it under the large plate and it's the last few shims before the compression tap. Start with the smaller shim instead of the 16s. I'm pretty shure you will like the results.

[Family Man TT Gold Member]

how does flipping the bleed valve affect performance?

[Family Man TT Gold Member]

so I would flip the entire stack after the large plate? so the three thickest shims are closer to the compression clicker adjuster? any of you happen to have a reccomended shim stack for the 2005 rm 250. how differant is it form the 2005 rmz450 stack.  The forks have tendency to be harsh on square edges at speed.

[Family Man TT Gold Member]

I found a pic of the 2005 rmz450 base valve and shims on the internet. Same as what I have.

[Family Man TT Gold Member]

[Family Man TT Gold Member]

disregarde the modified stacks and those are the stock 2005 rmz450 stacks

[mog Get Help Now]

As far as I can remember the rmz uses totally different stacks than the rm

[Family Man TT Gold Member]

Thanks to nohands: Stock Fork setting 05RM250 Base valve:
30.1(15)
29.1(2)
28.1
27.1
26.1
25.1
24.1
23.1
22.1
21.1
20.1

[Family Man TT Gold Member]

It looks like the differance is the subtraction of one 28.1 shim for the rm250.

[Family Man TT Gold Member]

Also thanks to nohands Im thinking about this stack for intermediate MX:
30(8)
24
28
26
24
23
22
21
20
18
16
Midvalve
20.1(4)
17.1(3)
Float.20

[Family Man TT Gold Member]

according to other spec sheets found on here the 2006 rm 250 has the same base valve setting as the 2005 rmz450. Do you think its a good idea to flip the bleed for Motocross? Ive read that this is a woods mod.  No Hand pointed out that the mid valve is stronger on the 2005rmz 450, so it might balance it out.

[Family Man TT Gold Member]

Any suggestions to make the stock shims work better, moving them around?
15-30.1 mm 4-20.1 mm 6-12.2
29.1 3-17.1 10.2
29.1 Collar 8x1.85mm 11.1
28.1 9.45 x .2 12.1
28.1 9.45x.2 14.1
27.1 16.1
26.1 23mm Piston 13.1
25.1 Bleed 1mm 19.1
24.1 Float .15mm 20.1
23.1 Piston Recess 1mm 20.1
22.1
21.1
20.15
Bleed Stack
16.3
10.2
12.1
14.1
15.1
16.1
16.1

[Vietze TT Silver Member]

The bleedstack gives additional lowspeed damping.
I flipped it on most forks or at least soften it up. Most rider feel more adjustability without it.
On a twostroke as novice you dont it at all.

Your stack looks really soft. less faceshims, crossover and a smaller clamp.
It will bottom very easy I think.

[Vietze TT Silver Member]

Flip the bleedstack and see how it feels.
You will notice a major difference.

What are your complains?

[Family Man TT Gold Member]

Could you reccomend a stack for me than, so i can compare? I was told The stack I posted is how RG3 valves for a 190 pound intermediate mx rider. the forks feel stiff overall, harsh at times. Im running 325cc of oil in the outer chamber. But Im kinda afraid to make them too much softer.  I figure that the suspension could be made to feel better, more planted with out bottoming.The back end feels real soft in comparison to the forks even with the compression clickers at 4-5 turns out on the shock.

[jwaseman TT Platinum Member]

Family Man, on 17 July 2012 - 03:05 PM, said:

Could you reccomend a stack for me than, so i can compare? I was told The stack I posted is how RG3 valves for a 190 pound intermediate mx rider. the forks feel stiff overall, harsh at times. Im running 325cc of oil in the outer chamber. But Im kinda afraid to make them too much softer.  I figure that the suspension could be made to feel better, more planted with out bottoming.The back end feels real soft in comparison to the forks even with the compression clickers at 4-5 turns out on the shock.

You may go to the midvalve and do some work there.  Don't think flipping the bleed stack will be enough IMO.  it could just be enough.
you can try taking a 1 faceshim on the comp. side on the mid valve.

Matter of fact, you can do this in stages.  1st. flip bleed stack like vietz mentioned then test.  If you need softer then go to Mid valve.
  Bring up the outer chamber oil 10 cc from 325.
If it were me I would go straight to the midvalve.  But if you do it stages and take notes you may learn more.

[Vietze TT Silver Member]

You cant copy a stack for a different piston.

Good advice given by jwaseman, I would do the same as he described.

[Family Man TT Gold Member]

Bleed Stack
16.3
10.2
12.1
14.1
15.1
16.1
16.1
when flipped it should look like this right?
Bleed Stack
16.3
16.1
16.1
15.1
14.1
12.1
10.2

[Vietze TT Silver Member]

you got it!