Help SACHS CC 2018 Shim stack from Spain

[cr_5]

Hi from Spain. I have a problem with this fork, is very harsh in rocks and roots. I change the oil for a Bel Ray 2,5 W and improve a little, more soft but when you go through a rocky area are very uncomfortable. In the circuit when you brake hard, the fork is very hard too and if you go through an area with a lot of potholes in a row is very harsh.
Anyone know any shim setting for more sensitive results??

The spring is the standard, second position preload to softer and my weight is 163lb.

This is the stock shims:
BASE:
25
23
16
25
25
25
25
24
22
20
20
18
16
14X0.2
12X0.2

MID:
19
20
20
15
13
11X0.2
11X0.2
11X0.2
11X0.2
11X0.35
FLOAT LOOSE 0.35

Thanks and sorry for my bad English

[Hyde]

Taking pre-load off these fork springs helps a lot, I' believe it should be 4-6mm and they come stock much more than that.

Made a noticeable difference on my 18' 250rr and 20' 250rr.

[cr_5]

Taking pre-load off these fork springs helps a lot, I' believe it should be 4-6mm and they come stock much more than that.

Made a noticeable difference on my 18' 250rr and 20' 250rr.

I take off one position. If take off all, the SAG won't it go down a lot?

[dirtbird]

Hi from Spain. I have a problem with this fork, is very harsh in rocks and roots. I change the oil for a Bel Ray 2,5 W and improve a little, more soft but when you go through a rocky area are very uncomfortable. In the circuit when you brake hard, the fork is very hard too and if you go through an area with a lot of potholes in a row is very harsh.
Anyone know any shim setting for more sensitive results??

The spring is the standard, second position preload to softer and my weight is 163lb.

This is the stock shims:
BASE:
25
23
16
25
25
25
25
24
22
20
20
18
16
14X0.2
12X0.2

MID:
19
20
20
15
13
11X0.2
11X0.2
11X0.2
11X0.2
11X0.35
FLOAT LOOSE 0.35

Thanks and sorry for my bad English

That 25X4 shims after the crossover doesn't look like the stock valving nor the 20X2 or the 14 and 12 clamps. The valving you have is not standard.
Try something similar to this with a SAE 5w oil between 15-20 cst viscosity.

25X2
16
25
23
22
20
18
16
14
12X0.2

[Darione]

This is the stock Shin stack RR390 my 18
Base:
25-0,10
23
20
25
25
25
25
24
22
20-0,15
18-0,15
16 -0,15
16
14 -0,20
12-0,30

Mid:
19 0,10
20
20
15
13
11-0,20
11
11
11
11
Reb.
20 -0,10 delta
18 semi delta
16
14
12- 0,15
10- 0,30
Greetings from Italy

[twowheels]

At the very least you're oversprung. You might also consider increasing the float on the midvalve to improve suppleness.

[cr_5]

Hi from Spain. I have a problem with this fork, is very harsh in rocks and roots. I change the oil for a Bel Ray 2,5 W and improve a little, more soft but when you go through a rocky area are very uncomfortable. In the circuit when you brake hard, the fork is very hard too and if you go through an area with a lot of potholes in a row is very harsh.
Anyone know any shim setting for more sensitive results??

The spring is the standard, second position preload to softer and my weight is 163lb.

This is the stock shims:
BASE:
25
23
16
25
25
25
25
24
22
20
20
18
16
14X0.2
12X0.2

MID:
19
20
20
15
13
11X0.2
11X0.2
11X0.2
11X0.2
11X0.35
FLOAT LOOSE 0.35

Thanks and sorry for my bad English

That 25X4 shims after the crossover doesn't look like the stock valving nor the 20X2 or the 14 and 12 clamps. The valving you have is not standard.
Try something similar to this with a SAE 5w oil between 15-20 cst viscosity.

25X2
16
25
23
22
20
18
16
14
12X0.2

Ok, I try this. The mid valve stock??
I take off pre load spring too. Now is in 3 position.