Earlier quoted context omitted.
As far as I can tell, a huge part is that they are incredibly overpriced. No one is going to pay $14k for an electric cycle when a brand new gas cycle costs $8k. People put together their own scooters from batteries, a controller and an electric motor on YouTube all the time, but companies are trying to get people to give up the same amount that could buy them a Ducati.
A friend of mine drives a zero. The very low cost per mile makes it cost effective.
As much as I'd love to own an electric bike,vlike a zero, they're still in a premium early adopter phase that I can't justify yet. A good comparison would be the model s vs 3.
Speaking of, it's a shame Tesla won't make an electric motorcycle.