Thanks for all the info. I'm in the process of doing this engine for my 88" 1/4 scale tiger moth and I have received the ring form Frank Bowman I have in larged the exhaust port and I also took out the bridge in the exhaust port and I have the 11.1 mm carb for it. I have A good friend that thinks all weed eater engines (converted engines) are A wast of time and not Worth the out come so as you can see I would like this thing to really run good and good enough to possible change his mind.

Thanks clocknut