no variation in rebound (Shiver 45)

[Klausen]

1, 22x1.0
2, 12x1.0
3, 20x1.0
4, 12x1.0
5, 17x1.0
6, 16x1.0
7, 14x1.0
8, 13x1.0
9, 12x1.0

Hi Nick,

is this stack not to stiff in high speed damping?
Because you stack is very thin and the base shim can't move very much and stops early.

I work for a German company called Klaus multiparking, any connection?

no connection sorry


Now I use Motul expert fork oil mixed 5W and 10W 1:1.
I feel more rebound. But I will test it more on the weekend.
And I triple up the base face shim. Low Speed damping is stiffer may be quadruple up.

I ride no cross tracks.
I ride enduro competition with obstacles, hard ground and also stones. Sometimes also sand tracks. Here I need more low speed dumping.

Is there anywhere a explanation for shim stacks.
For examble what happens when I make the stack thinner or thicker?

[nick790]

Originally Posted by Klausen

Hi Nick,

is this stack not to stiff in high speed damping?
Because you stack is very thin and the base shim can't move very much and stops early?

I think you may be right, I'm still fine tuning things
This will be my next step.

[moto9]

Originally Posted by nick790

I think you may be right, I'm still fine tuning things
This will be my next step.

I'm running 3w, I like the compression action, specially on the small square stuff, but the rebound needs a stiffer H/S stack arrangment...I'm getting some pogo on the bigger hits.
Next time in I should have it pretty close.

[Klausen]

the rebound isn´t enough

actual stack Marzocchi 2006

21 x 0,1
21 x 0,1
19 x 0,1
19 x 0,1
18 x 0,1
17 x 0,1
15 x 0,1

I use Motul expert Oil 5W /10W mixed 1:1 (26,9 reported cst@40C° [centistokes])
(for your info genuine Marzocchi original 7,5 W (26,10 reported cst@40C° [centistokes]))
air 135mm a little bit to much
preload 3mm
4,5 N/mm springs

may be I need a 22x0,1 face shim??

[Klausen]

Yesterday we were on the sand track,after them I tested the reboundscrew again.
No variation (open/close) when I push the fork and release.
Is this normal that the L/S rebound is so soft.
When I rode on the track it feels good
May be the H/S rebaound is better?

actual stack Marzocchi 2006

22 x 0,1
21 x 0,1
19 x 0,1
19 x 0,1
17 x 0,1
17 x 0,1
15 x 0,1

I use Motul expert Oil 5W /10W mixed 1:1 (26,9 reported cst@40C° [centistokes])
air 125mm a little bit to much
preload 5mm
4,5 N/mm springs



MV


15 x 0,3
15 x 0,3
22 x 0,3
11 x 0,2

Do this MV (bleed shim) also affect the rebound

[nick790]

You should feel a difference by just pushing the forks down.
The MV bleed shim shouldn't affect the rebound unless it's not letting any oil through at all. Is the seal ring on the rebound piston ok?

I would have thought you would have plenty of rebound damping with this set up

[GMP]

The MV bleed shim shouldn't affect the rebound unless it's not letting any oil through at all

This is incorrect. The MV functions like a check valve in the rebound direction. If there is bleed from a shim spacing the face shim off the piston, or from a shim smaller in dia than the piston exposing some port area, you have less rebound control and the low speed adjustment (clicker) has little effect.

I beleive I suggested to you in the other thread to remove the 11mm bleed shim on the MV stack before you do anything else.

[nick790]

Originally Posted by GMP

This is incorrect. The MV functions like a check valve in the rebound direction. If there is bleed from a shim spacing the face shim off the piston, or from a shim smaller in dia than the piston exposing some port area, you have less rebound control and the low speed adjustment (clicker) has little effect.

I beleive I suggested to you in the other thread to remove the 11mm bleed shim on the MV stack before you do anything else.

Of course you are correct, sorry must have been late when I wrote that

I have a similar stack to this but with no bleed shim on the MV, I have plenty of rebound damping.

What affect does a bleed shim have on the check valve MV? Other than possibly messing up your rebound.

[moto9]

Originally Posted by GMP

This is incorrect. The MV functions like a check valve in the rebound direction. If there is bleed from a shim spacing the face shim off the piston, or from a shim smaller in dia than the piston exposing some port area, you have less rebound control and the low speed adjustment (clicker) has little effect.

I beleive I suggested to you in the other thread to remove the 11mm bleed shim on the MV stack before you do anything else.

Was that some kind of mistake or off-thinking by the Marz factory...why would anyone place a bleed shim on the MV?
Adding more float would accomplish the same thing without sacrificing bleed off from the rebound circuit.

[GMP]

Moto9,

If its a mistake its been one for three years as my '07 was the same. I was surprised that the fork worked stock, but I didn't ride it initially in a situation that would exploit that flaw. BTW, GasGas specs the valving, and you would think that if it was a mistake they woukd have caught it. Crazy idea for sure.