Ok so unfortunately I celebrated to early and the problem is back...This time I have been able to pretty much all but guarantee the problem lies within the carb. I disconnected the inlet hose into the carb and checked if the pump was getting fuel there with crank. It was and lots of it. So now what inside the carb could it be. It was rebuilt with the Minor Rebuild Kit off Gordon's so new gaskets and needle and seat. Are there any common things on these Solex carbs that fail causing a fuel starvation symptom? I did check my accelerator pump and it seemed to be shooting fuel in but maybe not enough. Seems to lose spray under rapid on/off throttle.