Here's one of those look and then look again photos of a Kawasaki Z1 or what appears to be a Z1. In fact, it's a mini Kawasaki actually powered by an engine from a Kawasaki Z500. It's the work of Patrick Caralp of Mitik Moto in Tours, France.
I don't have much detail but it looks really cool, certainly nothing like the pocket bikes we see all over the place. With the 500cc engine, it probably has full size performance. He has a few other mini sized bikes on his site as well. Very cool! "Honey, I shrunk the motorcycle!"
Link: Mitik Moto