Never having run Kadrons, I'm especially unqualified to comment on how they compare to Webers, but life with Webers has been relatively painless for me. After Tony checked them out for freedom of movement, float levels, return spring tension, etc, and made a best guess on initial jetting, we only had to change idle jets one size and they've been good ever since.
Except for a little fuzziness off idle and through the mid rev range. Which disappeared with the new dizzy.
My point in the previous comment was only that spark and timing should be checked out thoroughly before any changes are made to the carbs. By this, I mean the timing mark should be watched carefully under a timing light to see how it moves as the revs are slowly increased from idle up to about 3500.
With my Pertronix, the mark was steady at idle, but 'disappeared' until it showed up again around 2500 rpm. There was so much 'scatter' in between, you couldn't see the timing mark at all. This means, of course, the spark timing was inconsistent from one stroke to the next in that rev range. And no matter what carbs you've got, the engine just can't be smooth with bad spark. To me, it makes no sense to monkey with the carbs until this gets checked out and, if needed, sorted.
My first engine, the stock 1915 from VS, had this same problem. It always sounded like it had an intermittent miss through the middle of the rev range. The timing mark also 'disappeared' in that range, too. And the distributor - a no-name Chinese Bosch repop - looked suspiciously like the Pertronix, only without the Pertronix decal. This is the same distributor I see on almost all recent VS's.
Just sayin'.
