I also would be interested in learning a bit more as to how one gets the most punch out of this motor. I am confident that the HSN is set properly-temps are around 210-215 degrees (45deg ambient, %70 humidity). Leaning it out will not make it go faster. The idle speed is about as fast as it can be without the clutch engaging. The metering needle is set so that the engine can idle for a minute without flooding or dying.

Now, how do I set the mixture control valve to get that punch like the buggies?