100 mph and up to 80 mpg; built by gray-haired engineers and it runs on die

They call themselves the Gray Eagles, a group of senior engineers who would rather build motorcycles than play golf. In a small, modest workshop in the Menomonee Valley, the Gray Eagles have built a powerful street bike that looks like a Harley-Davidson, kind of sounds like one, but has a diesel engine. Left to right - Gerhard Maier, Ron Barteldt, John Hickman, Nick Hirsch and Karl Nilson behind the turbocharged, diesel-powered Harley Davidson conversion while on a dyno in the lab.