I had some time to play yesterday. I smoked 40# of pork shoulder for a family get together. There is time to mess around while it is smoking.

Anyway, I gutted the muffler, installed a WT517 (11mm) carb, and made a new intake manifold. 16x7= 8200rpm, 18x10=6900, and 20x8=5600. That is very impressive to me, for a 23cc.