A diesel motorcycle would probably be the best bet, since diesel engines can be made to run on a variety of other fuels. The US Marines have one, the M103M1 (ht

A diesel motorcycle would probably be the best bet, since diesel engines can be made to run on a variety of other fuels. The US Marines have one, the M103M1 (http://www.nytimes.com/2008/02/24/automobiles/24KAWASAKI.html http://www.nytimes.com/2008/02/24/automobiles/24KAWASAKI.htm...) but they're not really available to the public.