What kind of rpm numbers are you guys getting, and with what props with your Ryobi 31cc engines?? I know they are not powerhouses by any means, but mine seems to be really doggy. It's not really broken in yet with only two tanks of fuel and a new Bowman ring, but it's only turning a Top Flite Power Point 18 x 6 at 7000. I raised the exhaust port timing to 150 degrees, installed an 11mm carb, open muffler, installed a new Bowman ring, etc. and I really expected a little more out of it. It is the single ring piston and cylinder with no slots. What performance are you guys getting??

Thanks,
AV8TOR