Harley: When One Engine Is Not Enough For Your Motorcycle 19 July 2012   Author: Mike Werner   Location: Travelling I would have thought that nowadays motorcycle engines were big, robust & powerful, and that you didn't really need more. But I was wrong.... meet the Harley-Davidson with TWO engines. The double engined motorcycle can be found at the Harley-Davidson museum in Milwaukee. Please, no double-leaking-oil jokes.....Does it make twice the noise? blog comments powered by Disqus