E-bikes are basicly a robot except they only have 1 em (electromagnetic) actuator on the back wheel.
Maybe you could sell a high-voltage electrostatic bike, maybe there would be people willing to buy it cause its novel.
I want to make an e-bike too, but never got around to doing it, the bikes on that classic manga Akira, had alot of e-bikes in it, thats the main movie that came out that pushed them into popularity.
I bet u could make a self riding motorbike as well, that would be interesting.
So what do u do exactly with them, u source the motor, driver and battery and u put them together?