Keihin carb stabilizers?

[ST1100]

I found two different version if the carbs I've at hand:

- soft, more flexible ones, made of spring grade stainless steel
- rigid, stiff ones, made of thicker, pretty solid steel plates

Methinks the first ones are the OEM quality, though they do seem to get bend easily when tightening the locknut after syncing (I found all soft ones been bend by PO/mechs, whilst on the carb with the "stiff" stabilizers, the links were misaligned...)

Some of the veterans care to elaborate?

[ST1100]

Are you referring to the metal link that connects the 2 sync screws between the carbs?

Yep...
IMHO designed to absorb/dampen vibration between those linkage "holders" (containing sync screws, springs, etc...), whilst holding them aligned.
Which is why I wondered about the rather stiff version found on one carb set, binding both holders together firmly, thus increasing the masses... ??