A lot of it depends on how you will want to fly it. I don't think it will do 3d well with much less than an 82 4 stroke. ( I don't fly many 2 strokes so I don't know that side of it ) I have a Saito 91 and the power is just right for me but then I plan to 3D with it and want to be able to pull out of a hover without worrying about it.