Motorcycles, even more than cars, depend on a very energy dense power source. Putting enough batteries in a motorcycle to give it decent range, and still letting it feel responsive is going to be a real challenge. Maybe in something like a Honda GoldWing where you're hauling around a huge amount of other weight, you could add extra batteries and not change the responsiveness too much. But, the kinds of people who ride GoldWings are not doing little commuter trips, so you'd need extreme range to satisfy them, which I don't think is feasible with current battery tech.

If there were a way to swap out batteries at the charging station, that would change everything.