Jonway vehicles are supposed to be DOT certified, so you should be able to import one to the USA and register it. Check there website and send them an email for more info. If you decide you want to import one, let me know and I'll help you if I can.
In regards to the link:
http://www.jonway.com/product.asp?type=16&keywords=&ctype=&p=2My red bike is the MBL-A 3000W with silicone batteries, and it goes a good bit faster than the specifications list. The MJS and MYX are beasts of a bike. The MJS 5000W with Li-ion batteries runs a little under $3000, and goes faster and longer than specs list. The MYX looks amazing. A guy across from my apartment who own a bike mod shop has one, and it is freaking awesome with the custom work he has done to it.
I'm an American, but I'm currently in Xi'an, China. There are more electric bikes/motorcycles/scooters than there are cars here. Where I live there are two huge electric vehicle malls with everything from e-bicycles to electric cars, plus lots of small shops I was looking at a compact E-car that seats 4-5 for only $3000. Prices here are great due to the large amount of competition. I was surprised. Compared to the USA, China is definitely way ahead when it comes to electric vehicles.
Also, there are lots of electric scooters in china, more scooters than anything else. My red bike is a electric motorcycle built on a scooter frame: motorcycle wheels, brakes, shocks and such. This is because most inner city delivery services and families use electric scooters since they can use the floorboard to carry stuff. Also the illegal taxis here are often electric scooters modified to add a carriage for carrying people.
After my experience with electric vehicles, I'll never go back to IC.