Thx to all who replied. I do not think the pipe is blocked. I do not have the luxury of a choke lever. Tickle only. Since this post I have been able to get it to puke out one overflow tube only. (Right side sitting on bike).I blasted carb cleaner through both tubes. Talked to Gary Ellis & he doubts the ignition is the problem. As I said, once running, this bike is pure magic. Skiracer, can you suggest where to get a mikuni and any specific model other than 38mm....thx again, George B