I went and got an electric fan and the guy who is doing the engine says it probably needs a bigger carb. Its a edelb. 600 model 1406 electric choke. He went and got the calibration kit and jet it out and that helped kool it down a little so instead of having about 4 or 5 header tubes glowing red hot we got it down to one that is still glowing. I'm trying to get down to exactly what the exact problem is and i need to know do i need a bigger carburetor like a 650 or does he need to adjust this timing???