Hey ! I got the little 20cc Zenoah to start up today and it runs great. It has plenty of pull with a 16x8 prop but, couldn't get a reliable tach reading due to dim lighting (and a cheap tach). It idles fine, transition is good, and top end appears to be peaked well. I intend to fly it the way it's adjusted now. Itweaked the low end a bit to get the 4 stroking out of it but, the top end didn't need a thing.
This little engine is very fuel efficient. It took a looong time to run the tank down to about 1/8 full. I got tired of waiting for it to run out and decided to shut it down and leave it that way.

I have a question about the expo and throws on this airplane. Ihave the rates set as recommended in the manual but, I'm not sure where Ineed the expo to be. Ihave it set very high right now but, I'm thinking I could lower it around 30 to 40% (on a DX7s). Ifly my 50cc bird with 30 to 40 % expo and it works fine. What would you guys recommend?

Thanks,
RJ