I have to wonder - how does the company get by with marketing in interstate sales a bicycle which is in violation of the Commerce department regs regardsing allowable power (750 watts) and allowable speed (20 mph on level ground unassisted by the rider). Legally speaking, that is NOT a bicycle, it is a light duty motorcycle, pedals and gearing notwithstanding.
Don't get me wrong, I think the allowable standards are ridiculously low, but that is what they are. With that clearly stenciled on 1000 watts designation, any savvy cop can nail you for failure to register your mototcycle, not too mention the absence of the federally mandated equipment motorcycles MUST havve - lights, signals, horn, strength of materials in construction, etc.
Good luck with it. My oldest brother is facing mandatory retirement soon from commercial aviation (he's a senior pilot with one of the majors), and he and I have been talking about him getting into building custom motor assisted bikes. He lives at the top of a really steep hill, in mountainous rainy country, and wants something that both he and his wife can ride, but doesn't want to go back to full blown motorcycles - he promised his wife he wouldn't years ago after wiping out on the autobahn in Berlin.
As he puts it, the Dodge crew cab pickup is a bit much for runs to the store. That hill he lives on is quite something - my son worked at the store at the bottom of it for awhile while living at my vrothers place. As my son said, having a wall of fur appear in front of you in the dark of a very early morning when you are at 60+ mph on a mountainbike wasn't fun. He killed the deer by caving in its ribcage and breaking its spine, and got really lucky. Eleven stitches in his right knee (antlers have sharp tips) and a mild concussion are all he got out of that one, thanks to good reflexes, a helmet, and stout clothes.