What is the maximum cylinder displacement for a vehicle to be classified as a moped?

The classification of a vehicle as a moped is primarily determined by its engine displacement. For a vehicle to be classified as a moped, it must typically have a maximum cylinder displacement of 50 cubic centimeters or less. This limit is established by various regulations to distinguish mopeds from larger, more powerful two-wheeled vehicles such as scooters and motorcycles. A 50 cc engine provides sufficient power for movement while maintaining a level of operation that is suitable for more casual riding and typically does not require a motorcycle license in many jurisdictions.

The definition is relevant because mopeds generally come with specific legal requirements for registration, licensing, and operation on public roads that cater to the different safety and regulatory needs compared to higher-displacement vehicles.