The following has been done. Both carbs rebuilt and set to specs. Plugs and points wires swapped from right to left to eliminate any possibility of an electrical problem. Problem remains on the right. The engine starts and idles reasonably well. After a mile of running at 2000 to 3000 RPM the right side starts missing. Actually it is more like quitting and starting. Upon return the engine will not idle. However, adjusting the idle set screw will bring it back but the idle RPM is not steady. At this point the right side misses at idle. If I choke it the right side accelerates the engine to 2000 RPM and after a short while it quits. Sometimes the right side starts again. Other times it won't. At this point I have drained the float bowl and found ample gas in both bowls. I'm new to motorcycle engines (pretty good with cars), but out of ideas. Any suggestions would be appreciated.