2nd UPDATE: Suddenly Street Legal! BWM Cafe / Former Racer.

Second Update.  Thanks once again to our very knowledgeable commentators (thanks Tony) I have been informed that this is a creation of Ritmo Sereno (maybe I should try reading the decals on the bikes).  A seriously drool-worthy Japanese base builder of custom European machines.  Here is a direct link to one of the bikes below.   I can't help you with the translation but the pictures speak for