I'm sorry but they are not motorized bicycles in the state of Florida, they are Mopeds.
before you reply negatively, read closely to the state statues I have posted here.
322.03 Drivers must be licensed; penalties.—
(1) Except as otherwise authorized in this chapter, a person may not drive any motor vehicle upon a highway in this state unless such person has a valid driver’s license issued under this chapter
316.003 Definitions.—The following words and phrases, when used in this chapter, shall have the meanings respectively ascribed to them in this section, except where the context otherwise requires:
(21) MOTOR VEHICLE.—Any self-propelled vehicle not operated upon rails or guideway, but not including any bicycle, motorized scooter, electric personal assistive mobility device, or moped.
(77) MOPED.—Any vehicle with pedals to permit propulsion by human power, having a seat or saddle for the use of the rider and designed to travel on not more than three wheels; with a motor rated not in excess of 2 brake horsepower and not capable of propelling the vehicle at a speed greater than 30 miles per hour on level ground; and with a power-drive system that functions directly or automatically without clutching or shifting gears by the operator after the drive system is engaged. If an internal combustion engine is used, the displacement may not exceed 50 cubic centimeters.
320.01 Definitions, general.—As used in the Florida Statutes, except as otherwise provided, the term:
(1) “Motor vehicle” means:
(a) An automobile, motorcycle, truck, trailer, semitrailer, truck tractor and semitrailer combination, or any other vehicle operated on the roads of this state, used to transport persons or property, and propelled by power other than muscular power, but the term does not include traction engines, road rollers, such vehicles as run only upon a track, bicycles, or mopeds.
(28) “Moped” means any vehicle with pedals to permit propulsion by human power, having a seat or saddle for the use of the rider and designed to travel on not more than three wheels, with a motor rated not in excess of 2 brake horsepower and not capable of propelling the vehicle at a speed greater than 30 miles per hour on level ground, and with a power-drive system that functions directly or automatically without clutching or shifting gears by the operator after the drive system is engaged. If an internal combustion engine is used, the displacement may not exceed 50 cubic centimeters.
REMEBER THESE THINGS and one more thing that I have that I can email you, if you ask. I have a letter from the state attorney's office of Florida which states you do not need to have a driver's license to operate a 49cc MOPED.
also check out
http://www3.flhsmv.gov/dmv/Proc/RS/RS-61.pdf
where it states : III. OWNERSHIP DOCUMENTATION:
A. Motorcycles (not mopeds) as defined in 320.01(27), Florida Statutes, are titled and
registered pursuant to s. 319.20, Florida Statutes.
B. Mopeds as defined in 320.01(28), Florida Statutes, are NOT titled, per s. 319.20, Florida
Statutes; however, they are registered pursuant to s. 320.0803(1), Florida Statutes. A
bill of sale, vehicle registration certificate, Manufacturer's Certificate of Origin, or an
affidavit from the applicant certifying that he or she is the legal and rightful owner of the
vehicle is required.