If you do out the math though, E-motorcycles are doomed to failure, except in the midwest and Florida, with the current battery chemistries. If you even assume a highly efficient motor running at peak efficiency, and LiPO batteries, a bike with any range beyond to the local grocery store will not have the power to climb hills at current speed limits. A big leap forward in electrical energy storage is needed (as well as electrical infrastructure to charge an endless number of vehicles) to make e-vehicles truly practical.
This is why I like the idea of e-bike, the human contributes some of the power needed, which allows for a smaller battery pack, and therefore improved range and performance. They also really help to solve the obesity epidemic within the US.