I have been taking short rides, progressively longer, breaking it in. No smoke, no weird noises.
I'm sticking with the VM34 single Mikuni for now, as it works. I got it running with what I had, way too big of a main jet at 290, and no markings on the pilot. Bought a bunch of jets, and went to a 27.5 pilot and 230 main to start. It idled better (but also has been breaking in and that helps), but the mid-throttle transition brought stumbles. I put 35 pilot in and it is idling well after adjustment, and opening up the throttle hard through the range is fine. But.. a slight opening of the throttle in mid-range brings a stumble. That didn't happen with the original settings. I have been checking the float level carefully and also dropped the needle clip down (to enrichen it). I have a 159 P2 needle. Whether that's good or not, I don't know. But I'm close, and it's fun to ride. But that slight stumble has to go. Thankfully it's about a 15-minute job to make a change - vs the bank of 4 carbs on my other bikes that I'm used to.
It starts 1st or 2nd kick when cold with the enricherner lever pushed down. It's easy to kick for me or my son, but I'm heavy, he's young haha. Once warm, it's one kick every time. I changed fork fluid and the front end is great, like magic with good absorption and a super firm lever. I can chirp that front tire at any legal speed.
The gearbox (which I rebuilt) is not as slick as my old '66 Bonneville, which had easy short throws, but with firm action, it's not a problem. The clutch is really good, and all I did was clean up the original plates which had about 15K miles on them and sat for 50 years haha. I'm still bedding in the rear brake, as I don't use it so much. It is a blast to ride and sounds fantastic and seems to be healthy and holding its fluids inside.
I took a ride to Cook's corner, and through Live Oak Canyon and the surrounding area. Here's a pic, because people like pics....