RE: FAST WM MIDGIT MUSTANG
Depends! are you new to RC planes? if you're not, I would not even think of getting it up never mind putting a larger motor then the specs. If you are experienced flyer I don't know what size? too big would be nose heavy, I you never had any flight time , it's not the plane to start with, you should start with a trainer first, otherwise you may have to pick up the pieces.
roltech