While major motorcycle manufacturers produce a wide range of impressive mainstream bikes, the custom-built world of motorcycles is far stranger, with some examples that seem to break all the rules.

You know the type. The Birkenstock-wearing, beard-stroking college professor neighbor that self-righteously drives around town in his Prius adorned with the obnoxious "Carpool Lane OK" bumper sticker.

July 18, 2005 The concept of a diesel motorcycle is not one that has occurred to a lot of people – at least not many have thought about it for long because despite a rich century of innovation in ...