Biodiesel motorcycle

I wasn't really sure where to put this. I didn't know whether to post it in Motorcycle lubrication, interesting articles, or here. Anyway, this guy built a Biodiesel Harley.
“The idea of building a motorcycle that could run on biodiesel fuel started out as a joke,” recalls Harold’s wife, Jody. “Nobody thought it could be done. That was the wrong thing to tell Harold.