That gives me a much better idea of how that works, and about the reeds and the supercharger effect like you said. That makes more sense to me why compression is so little til you start cranking, and the reeds keeping it all from spitting back out the carburator. If you had a bad reed for some reason, it would be spitting as much fuel out the carb as it sucks in. I imagine compression would be lower typically if leakdown and blow by was taking place, and with the cylinders standing alone on different crank timing, why the health and compression numbers of the cylinders have to be close for balance and power curve
