Thanks, I think I will open it up a bit more. Even with no silencer, these bikes are not as noisy as the custom V-twins roaring up and own the road.
I think I've got the carb just about right. When I first installed it, it was very rich, si I moved the clip on the needle one notch. That seemed to help, but the plug was still a bit sooty, Not enough however to move the needle another notch, so I put a few 1/4" holes in the baffle by going in through the inlet side of the silencer. It's still pretty quiet and the plug is cleaner.