29hp sounds pretty good to me. I'm not looking for big numbers, just something fun to trail ride with. And something that would allow my wife to at least come close to keeping up with my z400. Between her weighing a lot less than me, and the 230 being about 80lbs lighter than the 400, I don't think it would take a lot of power to get her there.
The stock engine that's currently in my 230 frame is probably making around 15-17hp.
I'd be interested in knowing more about your engine setup, if you don't mind sharing.