Rather old t
hread, but still useful. It seems that nobody tried reshiming of kwik toggle damper, so let me be the first one. If you look closely to photos in posts above, you could notice that shim stack of our damper consists of 4, not 3 shims. The last one is so called clamp shim and it is located above main shims. So our damper have this structure:
top cap
damper body and shaft
12x10x0.4mm clamp shim
21x10x0.2mm main shims - 3 pcs
valve
Factory shim stack is stiff and preloaded one, and preload is created by uplifted border on the surface of valve. This means that in lock position very high oil pressure needed to crack open this shim stack, and that's why we have quite solid lockout. But it also means that we have rather big HSC (high speed compression) level in open mode.
Shaft have diameter of 13 mm and OD (outer diameter) of clamp shim is 12 mm. So shaft itself can be a clamp and our clamp shim can be placed anywhere else as preload reducer shim. With a bit bigger diameter of shaft than clamp shim's OD it means that a bit more force will be needed to deform shims to the same amount, but actually it wouldn't be even noticeable.
So if you are a lightweight XC rider and you want to reduce platform in lockout mode, you may just take away one of 3 main shims.
But if you want to have more support and compression in "lock" position instead of true lockout, your option is repositioning of clamp shim. You can get "trail" or "
linear" shim stacks as they are called in Manitou's ABS+ tuning guide. Here are couple of examples.
1. "Trail" - minimal platform with high compression:
21x10x0.2mm
21x10x0.2mm
12x10x0.4mm
21x10x0.2mm
valve
This shim stack looks like crossover one, but actually it is not. Clamp shim which is now used as preload reducer have nearly the same thickness as valve border height. So lowest shim is preloaded and creates a platform, but there is zero gap (on the edge) between it and upper two shims, which are not preloaded now due to 12x10x0.4mm preload reducer shim. You can put 2 main shims below preload reducer and one above if you want more stiff platform.
2. "Linear" - no platform, high compression
21x10x0.2mm
21x10x0.2mm
21x10x0.2mm
12x10x0.4mm
valve
This shim stack have no preload at all (as I mentioned earlier, preload reducer have nearly the same thickness as valve border height), and main shims will create rather linear compression.
You can make your own shim stacks with lower compression by taking off one of main shims above preload reducing shim. Unfortunately you can't use ABS+ shim stacks due to difference in OD and ID.
Keep in mind that reshiming affects HSC in both locked and open modes.
The last thing that I want to mention: as kwik toggle damper have no fixed positions when you are using it without remote, you can just put a rubber O-ring under the lever (I've used 28x3.1mm). This will make rotation rather firm, but lever will remain exactly in that position where you leaved it regardless of how gnarly your trails are.