Agreed, it's the first thing I'd try if I had one. When I first got this carb back, I couldn't get it to idle under 2K, in order to diagnosis that I borrowed a carb that was just "re-built", it was in bad shape, coughing and back-firing. So I had an old 600 that I put on, it had multiple leaks. Nothing else local to pick from. So if I had a carb that I knew was good I'd put it on, but doing so wouldn't tell me much about the one I'm trying to fix. I'm all for swapping parts, but I'm sure my current carb is the issue. I have another carb getting done and will have it a few weeks. Looking forward to that. But I do think I'm on the right track, at least I hope so. I re-finished the carb body tonight and will try it tomorrow, although I don't have a new gasket yet.

Thanks for the tip on the PV