Kitfox 4 Classic 1200. 80 HP 912 Rotax. 645 lb. If I held a part up above the work bench and dropped it, and it hit the bench, I didn't put it on. Almost any way :-) (kidding) Did everything to keep it as light as possible though. Except for the Grove gear which was on the plane when I got it and still is there. JImChuk