In Utah a motorized bicycle is classed as a moped which is a motor-driven cycle. A motor-driven cycle is defined as:
- Having pedals to permit propulsion by human power.
- A motor which produces not more than two brake horsepower.
- The motor is not capable of propelling the cycle at a speed in excess of 30mph on level ground.
- If an internal combustion engine is used, the displacement may not exceed 50 cubic centimeters.
- The moped must have a power drive system that functions directly or automatically without clutching or shifting by the rider after the drive system is engaged.
To ride a motorized bicycle in Utah you will need a valid drivers license. A motorcycle endorsement is not needed.
Yo do not need registration or insurance to ride a motorized bicycle on pubic roads as long as it fits within the definition of a motor-driven cycle as outlined above.