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Beta 350 Sach rear Shock revalve help?


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I have 2014 Beta 350 and the rear seems harsh on smaller square edge stuff especially at slower speed which is causing it to also deflect. I have read a lot people say they are too soft in the intial part of the stroke and this may be the case, I have stripped it down and the stack is as follows;

20x0.3
22x0.3
24x0.3
26x0.3
28x0.3
30x0.3
32x0.3
34x0.3
36x0.3
28x0.1
36x0.2
36x0.2
38x0.2(x6)
Piston
44x0.2(x5)
42x0.2(x3)
40x0.2(x2)
34x0.15
44x0.15
42x0.15
40x0.15
38x0.15
38x0.15
36x0.15
34x0.15
32x0.15
30x0.3
28x0.3
26x0.3
24x0.3
23x0.3

 

I am running the std 5.4 which checks out just fine, also i noticed it seems like there is too much high speed on the shock as turning the HS adjuster fully out seems to make it perform better, is there any benifit in changing the stack in there as well? Any help would be great. 

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It would be very helpful if you posted some information about your riding skill, speed, and the terrain you ride.

 

Are you sure that the shims in the high speed part of the stack (after the crossover) are 0.15 mm thick?  That would be quite odd.

 

I have a Sachs rear on both of my Huskies.  I can pull up the valving at home tonight (if I remember), but until then a few comments:

 

-The shims before the crossover are odd.  Usually you'll just see face shims, but that has a slight taper (44-42-40) before the crossover.  I'd be very tempted to remove the 3X 42.2 and 2X 40.2 from before the crossover.  I'd probably remove them altogether, but I want to get clarity on the 0.15 thick shims before I recommend that.

 

-23 mm is medium/large for a clamp on an offroad bike, depending on your speed and usage.  Lots of woods/offroad guys are using as small as a 18 or 20 mm clamp.  I will have to look up what sizes I am using, I think I am down at 18 mm on the 300 (light bike) and maybe 22 or 23 mm on the 610 (heavy bike).

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It would be very helpful if you posted some information about your riding skill, speed, and the terrain you ride.

 

Are you sure that the shims in the high speed part of the stack (after the crossover) are 0.15 mm thick?  That would be quite odd.

 

I have a Sachs rear on both of my Huskies.  I can pull up the valving at home tonight (if I remember), but until then a few comments:

 

-The shims before the crossover are odd.  Usually you'll just see face shims, but that has a slight taper (44-42-40) before the crossover.  I'd be very tempted to remove the 3X 42.2 and 2X 40.2 from before the crossover.  I'd probably remove them altogether, but I want to get clarity on the 0.15 thick shims before I recommend that.

 

-23 mm is medium/large for a clamp on an offroad bike, depending on your speed and usage.  Lots of woods/offroad guys are using as small as a 18 or 20 mm clamp.  I will have to look up what sizes I am using, I think I am down at 18 mm on the 300 (light bike) and maybe 22 or 23 mm on the 610 (heavy bike).

Hi I am expert level rider but we mainly ride tigher woods aposed to wide open fast going. The issues are roots and square edge bumps where it doesnt work well and tends to deflect and kick, mainly when underload ie sat down coming out of corners. 

I have double checked the shims after the cross over and they are correct. Thanks for your input.

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Interesting.  That is quite an odd stack!  0.15 and 0.3 in the taper, no 0.2 or 0.25...  Silly Sachs!

 

Do you ever feel like the rear bottoms or blows through the stroke, or is it good otherwise?  Where do you like the clickers best?

 

Rebound looks fairly reasonable.  No ring shim on that?  Where do you have the reb clicker, any trouble with reb?

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To me, the stack looks like it's too harsh initially, not too soft  There are a lot of shims before that crossover...
 
I would try something like this:
 
(Comp)

44x0.2(x5)
34x0.15
44x0.15
42x0.15
40x0.15
38x0.15
38x0.15
36x0.15
34x0.15
32x0.15
30x0.3
28x0.3
26x0.3
24x0.3
23x0.3
 
(remove all the 42s and 40s before the crossover)

You may also want to consider going smaller on the clamp, depending on how that revalve feels.  I am running an 18 mm clamp on my WR300, and a 22 mm clamp on my 610.

For rebound on my WR300 (5.4 spring), I am using:
38.25 (2X)
38.3
28.15
36.3
34.3
32.3
30.25
28.3
26.3
24.3
22.3
20.3
18.3

I think this is not too far off from yours, although a bit softer.  I think my face shims are a bit stiffer but then I am clamping on a 18.

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  • 6 months later...

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