Here's my candidate for coolest three wheeler http://www.go-t-rex.com/I was invited to take one for a test ride this past spring while at the Vancouver auto show.It's a wicked fun ride. The web site hasn't updated the engine specs yet. The 2007 model is powered by Kawasaki's 1400 R racing engine! Oh Yeah, here's "Fifth Gear's" TV review of the the T -Rex: