no variation in rebound (Shiver 45)

[Klausen]

I have a 2006 GG 250 Marzocchi fork
my weight 85 kg without gear
my Fork specs:

130mm air
4,5N/mm spring
6mm preload
SAE 5 oil

Rebound stack:
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

when I open or close the rebound screw full I don't feel a difference
What is the reason?
Is the thin oil bleed to much beside the first shims.
Is a 22x0.1 Shim better - I want continue to use the SAE5 oil.

Another problem is the fork feels a little bit uptight on the first 3cm.
But the forks are parallel and the srews have right torque.
Why?

[armyoforange]

this is my rebound stack 07 45mm zokes-22x.20 -21x.30 -20x.30 -19x.30 -17x.30 i use 7wt .43 kg spring 10mm preload

[nick790]

It's very easy to over tighten the triple clamps, i think the spec in the manual is to tight? I made this mistake at first.

I think your have to go heavier with your shim stack with the 5w oil.
I tried 5w, but changed it straight back because I couldn't get any rebound.

1, 22x1.0
2, 21x1.0
3, 19x1.0
4, 19x1.0
5, 18x1.0
6, 17x1.0
7, 15x1.0

This is my rebound stack with 7.5w oil, I run the same spring as you.
And yes, you will need a 22x10 at the top, maybe two with the 5w oil.

I'd be interested to see where you get to with it, keep us informed please.

[Klausen]

OK I will try the 22 Shim.

It's very easy to over tighten the triple clamps, i think the spec in the manual is to tight? I made this mistake at first.

When I maintained my fork I notice a different resistance when I push the inner tube in the outer tube.
Have anyone of you experience with "fine" honing of the outer tubes?

[nick790]

Never felt it before, but never really looked. Sorry

[Klausen]

My fork has also a too soft low speed damping.

Just I read an nice article about suspension.
This sentence I found very interesting.
"Oil is such a critical suspension tuning decision that is the first priority to get worked out after spring/sag choice."

Which oil recommends Marzocchi exactly?
Because the SAE weight system has a very broad and vague viscosity range and does not even cover the viscosity range that most quality motorcycle suspension systems require.

Is there any basevalve with a parabolic shape on the market for Shiver 45?