Adjusting knobs on rear Sachs suspension unit - MVAgusta.net
 
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post #1 of 3 (permalink) Old 04-25-2010, 07:41 AM Thread Starter
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Adjusting knobs on rear Sachs suspension unit

On the picture below, it shows which bolt or knob is for high- and low-speed compression damping. The thing is, I can't see a god damn thing from this picture.

Is the bigger one(outer ring) for low speed and little one(small bolt) for high speed damping or is it the other way around?

Can someone that is 110% sure help me with this?

Thanks!
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post #2 of 3 (permalink) Old 04-27-2010, 11:35 AM
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Center is low speed compression.

Outer is high speed compression.

FYI - the center is a pin that will block an orifice, which forces more oil through the shim stack. So if you turn the center clockwise (in), the compression damping increases (firmer). The high speed adjuster is working against the shim stack, so you are actually adjusting the pressure on the shims. At least that is how the high speed adjuster works on most shocks.

An important note - the high speed adjuster is backwards from the others - full-in is soft.

For the adjusters, you turn them all the way in (clockwise) and then start counting clicks as you go counter-clockwise. If you look at the chart, you'll notice that the soft settings for the low speed adjuster have a large number of clicks (like 18), so you are backing that pin out of the orifice a long way. The high speed adjuster is just the opposite of that. For a soft setting, you only go out 6 clicks or so.

Probably more information that you wanted, but maybe it'll help you understand how the adjusters work and keep you from turning them the wrong way.

Alex
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post #3 of 3 (permalink) Old 04-27-2010, 02:51 PM Thread Starter
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Quote:
Originally Posted by altoon View Post
Center is low speed compression.

Outer is high speed compression.

FYI - the center is a pin that will block an orifice, which forces more oil through the shim stack. So if you turn the center clockwise (in), the compression damping increases (firmer). The high speed adjuster is working against the shim stack, so you are actually adjusting the pressure on the shims. At least that is how the high speed adjuster works on most shocks.

An important note - the high speed adjuster is backwards from the others - full-in is soft.

For the adjusters, you turn them all the way in (clockwise) and then start counting clicks as you go counter-clockwise. If you look at the chart, you'll notice that the soft settings for the low speed adjuster have a large number of clicks (like 18), so you are backing that pin out of the orifice a long way. The high speed adjuster is just the opposite of that. For a soft setting, you only go out 6 clicks or so.

Probably more information that you wanted, but maybe it'll help you understand how the adjusters work and keep you from turning them the wrong way.

Alex
Thanks for that, but in the mean time, I remembered I could go and see the manual.

Here's the interesting part; all adjusters have standard position, from which we count clicks, fully in(clockwise)
Except for the high-speed adjuster, which has a standard position and from which we count clicks, fully out(counter-clockwise).

So fully-in is always the ''hard'' setting, it's only the way of counting that is different.
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