OK then
Does your wideband whatever you have setup chart AFR readings along with RPM so you have a reasonable idea about what jetting needs changing? Without the RPM info you are just relying on your seat of the pants dyno. That's all I use myself.
Have you ridden a Combat (2S) cammed 750 Norton with a 34mm twin Mikuni carburetion setup on it? I have and Sudco jetting is close enough unless always riding around in town short shifting between stop lights. The kits are for race use, so to get the most out of them on the street one does have to ride over 50mph in 4th, and hold gears a little longer. Otherwise the plugs will show rich, and I would imagine a wideband would as well. Now if the goal is to tune for slower short shift riding, then it is probably true that the jetting is wrong.
When you get done with the AFR numbers chase and change jets only to discover that the top end is weak, you might want to put the 230 mains back in.
This is the MAP kit I took off when I installed the 35mm FCR pumpers. My MAP Mikuni kit intake manifolds are modified for spigot mount on an Atlas oriented 750 engine, so they look different. I had a 2S cam in the motor, shaved head, Commando flat top pistons, and 2 into 1 exhaust. Head has 31mm intake openings and is ported. Jetting is as the carburetors came. I never did try a smaller air jet. I did try a bigger one and that was a bad idea. So the 2.0 may have also been on the big side. It did work though. I did try a bunch of main jet sizes, but the 230 was the best on my seat of pants dyno. Reason for trying different main jets was the 2 into 1 exhaust was terrible until I made it longer gutted it and put a SuperTrapp setup on the end. I have since removed the SuperTrapp disc setup and made my own full length baffle for the megaphone and I'm making more power sooner. Also quieter.
Sorry about the side track. Just trying to pass some experience with those carburetors on a Combat type engine.
