I omitted something when I wrote the last post...
Basically for Nevada...
If it's 50cc(gas) or 1500w(electric) or less and 20mph or more and it's a moped.
You need a license.
If it's over 50cc or over 1500w it's a motorcycle.
You need Endorsment
If it's electric and is less then 20mph and 750w, it's considered a bicycle.
All of that can be found in section NRS 482 in the Nevada code....
Nevada is not "necessarily" a "DUI friendly" state, except for the fact that they will allow you to ride an electric bicycle not capable of speeds of more than 20mph (via motor power alone) without the need of a license.
You do NOT need to register a moped..