BTW - The whole issue of State regulation in this area seems to have led to some pretty startling disparities - NM is pretty cool, as Dogman related, but neighboring states CT and NY are on different planets. I was blown away when I recently discovered that ebikes are flat out illegal in New York as detailed in the doc link earlier in this thread:
"Motor-assisted Bicycle - a bicycle to which a small motor is attached. A motor-assisted bicycle does not qualify for a registration as a motorcycle, moped or ATV and does not have the same equipment."
"These devices are not allowed on any street, highway, parking lot, sidewalk or other area that allows public motor vehicle traffic.
But - across the state line: Connecticut implemented this truly wondrous statute in 2011:
Sec. 14-1. *(See end of section for amended version and effective date.) Definitions. Terms used in this chapter shall be construed as follows, unless another construction is clearly apparent from the language or context in which the term is used or unless the construction is inconsistent with the manifest intention of the General Assembly:
(52) "Motor-driven cycle" means any motorcycle, motor scooter, or bicycle
a. with attached motor
b. with a seat height of not less than twenty-six inches and
c. a motor that produces five brake horsepower or less;
(53) "Motor vehicle" means any vehicle propelled or drawn by any nonmuscular power, except
m. motor-driven cycles as defined in section 14-286,
p. any other vehicle not suitable for operation on a highway;
(54) "Motorcycle" means a motor vehicle, with or without a side car, having not more than three wheels in contact with the ground and a saddle or seat on which the rider sits or a platform on which the rider stands, but does not include a motor-driven cycle, as defined in this section, or a vehicle having or designed to have a completely enclosed driver's seat and a motor which is not in the enclosed area;
The short form: an ebike of up to 3.75KW is legal in CT... No speed limit.