Awesome DIY Electric Bikes Defy Laws, Good Sense
See Also:
The Craziest Home Made Bike Mods
Five More Crazy Bike Mods
Amazing DIY Cargo-Bike Mods
Mutant Mods and Anarchy at Bike Kill
Gallery Of Crazy Tokyo Bike Mods
Source: http://www.wired.com/gadgetlab/2011/02/gallery-electric-bikes/