A 1934 BMW R7. I don't ride motorbikes, I can't even ride bicycles, but oh man. Want. It looks like it's going to pounce on something and eat it. It wasn't ever put into production because it was too complicated and expensive to produce, it was packed into a box and kept in a warehouse somewhere. What with all the war, chaos, etc., it was only a few years ago that it was rediscovered and reassembled.