Hmmm. Well lets look at RyFly05 response. What makes a bike street legal? First off this board is full of guys who posted about all the various ways to remove emission components so we can omit that part of the conversation. Please chime in if I missed something but I was under the impression that you need at least one side mirror, a headlight, front are rear signals, a license plate and some sort of tread pattern. These hardly constitute a radical alteration to the bike. My 2006 1000rr was a factory HRC kit bike. I put an integrated tail/signal in the tail. A HID Bicycle light in the nose, a couple of little front indicators, two of my micro mirrors and a plate. I registered it in 06 and have been riding it legally registered on the street ever since. My 1299 is basically the same thing. So It would be very easy to make that BMW (sans emissions) something you could register and easily ride on the street without much money at all.