I don’t have a race for a few weeks. I can’t try it for a bit, but I will.
I had the same thought since it has happened before albeit only one stumble. I richened up the idle mixture, and used a smaller bypass pill. No changes either way.
So far I rewired the ignition, removed the ballast resistor, changed the battery, in the middle of changing ignition boxes, moved the starter in case the power post was arcing off a header tube, went through the fuel system barrel valve, checked and cleaned all the grounds, and changed the shift timer box.
