av8tor1977. Thanks so much for the info. I know its an awfull lot to get out all at once lol.

I dont see any reason to modify the intake tube on the stock packplate. I also got a carburater off of e-bay and it has the 12.8 mm venturi. It may be to big but wanted to try it anyhow. The intake tube is 16 mm which is what the bore of the butterfly vavle is. the limiting factor of flow in this situation is gona be the venturi which is the smallest part. In other words the intake tube on the back plate is still the largest part of this set up so increasing the diameter of this part will increase the voulume it can flow but wont do any good as the venturi is far smaller. In my opinion it will actually reduce the velocity of the air if it is increased. Bigger ports are not always better. sure you can move larger voulumes of air but at a snails pace.

The gasket thing makes sense and thats what i am going to try also. I am wondering if there can be more improvement in this area. Thanks for the info on port timming I found a pretty good like for this but it still does not have a recomendation for the best port timmings. http://rcfaq.com/ANSWERS/ENGINES/TIMING.HTM they also do not cover the correct way to find tdc which i will cover on another thread. it requires the use of a dial indicator which can be made out of a old spark plug and an in expensive harbor frieght dial indicator. I will show this on my thead also. http://www.rcuniverse.com/forum/m_8479610/tm.htm

I was wondering if the engine would balance without the flywheel. It sounds like the flywheel is balance indepndant of the engine. I dont quite understand how all this fits together without the flywheel. Do you make a spacer to go where the flywheel was? I was thinking just cutting down the flywheel to where i wanted it to be able to mount a magnet in it for the hall affect switch. It would be great to see a pic of what you have done in this instance. Where do you get the magenets for the pickup? I am considering using the ignition set up on hobbyking.com. like i say a complete set up can be gotten for around 40 bucks shipped.