She vibrated remarkably little with 100 main jet, was like a cat purring :) I am not worried of those vibrations :) They are nothing when compared to times when there was the restricting seal between cylinder and carb.

The carb issues is a bit annoying but will have to take it into account in traffic lights etc., and "wake up" the engine in advance.

Interesting stuff that about water cooled Jawa, did not know that, it certainly makes the old Jawa more desirable. Ah, well, Jawa is great :)