I've been very busy lately but I managed to try the tests like Shazaam was suggesting.
First, I do not manage to stumble the engine on the rich side of the potentiometer. On the lean side I found the the stumble point. Why that ?
I warmed the bike (when cold the throttle response is spot on..) confirmed the bad throttle response (blipping from idle) and tested various potentiometer settings.
On the rich side i got backfires what probably indicates too rich but still the same lagy response. I didn't find a position where the throttle response was like when the bike was cold, this up to the lean side.
I kind of "heard" an optimal setting where the engine idles cleanly and that was the original setting I had..
An idea what the problem could be ? I don't get it as everything is now original. But the previous owner had a full race Sil line with ultimap chip. I have the original EEPROM now, maybe they have been touching more than just the richness pot...maybe carb/injector settings...
Expert help welcome ;-) !
The bike is very much ridable because while riding it rarely drops to idle, it is not dramatic but this still bugs me, for sure it is not normal.
The little blipp at the red light is most often a failure
(needs to be fixed, it's a ducati not a mopped !!!)