Once you throw out the internal combustion engine and all the bulky bits that go with it, the definition of a motorcycle can suddenly become a lot wider. Take the Comoto from Hirsch Design - it's even smaller than the Zero S bike, and begins to blur the boundaries between motorcycle and mountainbike. Using an electric motor mounted in the rear wheel hub to eliminate the need for a chain drive, the Comoto can do more than 40mph (65kph) and do just over 30 miles (~50km) on a charge under normal riding conditions. Best of all, it weighs just 118 pounds (53kg), making it one of the lightest motorcycles we've seen.
Read the full article: 2010 Comoto blurs the boundaries between electric motorcycle and MTB