I've had this idea for a while that a bare-bones electric motorcycle - sort of a chopper/bobber esthetic - might look pretty cool. Here's somebody who's mounted a serious motor and enough batteries to punch it on a beefy bike frame. It's got suspension and brakes but it's not meant to be street legal. This build is a few years old but I can see this being a worthwhile direction for electric one-off's.
http://www.instructables.com/id/48V-Electric-Flat-Tracker/ 
