did you say you left the base gasket on it? the gen 2, at least on my old 08 had a base gasket that was 2 layers, one layer was about .010" and the other was a little .005" thick one
they are crimped together at like 2 or 4 spots i cant remember, but i almost misssed it cause they dont have the little ring holding the layers together
i split the base gasket and threw out one, cant remember which, to get the piston to head clearance where i wanted it
also shark milled the head more i think
thats probably why it wouldnt start when real hot, plus i only had stock battery
im gonna get a copy of the dyno sheet today and post it up for comparisons sake since it was very similar (also mine was dynoed with the stock gen 2 tire)