Duro-power 52cc Conversion engine. Got it for $80. I dont know what fuel mixture was used. These readings were taken by Gaines Smith (he did the conversion on this engine). Engine was tached with 2 different meters on different days.

9000+ RPM with an (OLD) dynathrust 20x10 Peak was 9400
Idle 1500Rpm
All up wieght is 6lbs

[link=http://video.google.com/videoplay?docid=7063498753981003477]Engine Video 1[/link]
[link=http://video.google.com/videoplay?docid=1899399485091143431]Video 2[/link]

The plane for this engine is under construction at the moment.. these figures were from a bench test. The engine has never been in the air.