How about a diesel?

[ClassicVW_imp]

Not much info, it's probably just a prototype and aimed at military uses...

http://kiravan.net/kirabike/

[Henrik_imp]

That actually looks like a Track T-800 CDi. A diesel bike built in Holland, with the engine being a three cylinder diesel engine from the Smart car. <they started selling the bike in 2009, and I believe have stopped since 2012. Although a good idea, it was plagued with problems. Here is a link to a post by a guy who had one for some time, but finally gave up: http://www.advrider.com/forums/showthread.php?t=957866

[Cormanus]

What a pity they were so unreliable. I've been wondering recently about the possibility of a lightweight turbo diesel in a bike. Should have realised someone had already done it.

[the Ferret]

Kawasaki has been producing a diesel KLR 650 for the military for at least a decade

http://olive-drab.com/idphoto/id_photos_m1030_m1d.php

http://www.gizmag.com/go/4272/

http://www.nytimes.com/2008/02/24/automo...ASAKI.html

[The Spaceman_imp]

Forget diesel, turbines are more reliable, can burn diesel or JP if tuned right, and you can melt plastic car bumpers at traffic lights:

http://en.m.wikipedia.org/wiki/MTT_Turbine_Superbike

[Mike Bee_imp]

Jay Leno has a turbine powered bike.

https://www.youtube.com/watch?v=sM7PK5d2Yug