they do look kinda out of proportion. its got alot to do with the short swingarm, smaller plastics and smaller wheels. this is more of a vertical style engine and with that, it makes the bike more vertical in doing so, to balance this out they needed to lenghten the seat and plastics, which meant lengthening the frame and also the swingarm etc... then you might as well just go out and buy a 125 2 stroke full size and not waste your time (or a 250F if your so keen on your 4 stroker's)