Illinois

Motorcycle:

“Every motor vehicle having a seat or saddle for the use of the rider and designed to travel on not more than 3 wheels in contact with the ground, but excluding an autocycle or tractor.”

Motor-Driven Cycle:

“Every motorcycle and every motor scooter with less than 150 cubic centimeter piston displacement including motorized pedalcycles.”

Moped:

“a motor-driven cycle, with or without optional power derived from manually operated pedals, whose speed attainable in one mile is at least 20 mph but not greater than 30 mph, and is equipped with a motor that produces 2 brake horsepower or less. If an internal combustion engine is used, the displacement shall not exceed 50 cubic centimeter displacement and the power drive system shall not require the operator to shift gears.”

_{(Source: https://www.ilga.gov/legislation/ilcs/ilcs5.asp?ActID=1815&ChapterID=49)}

	Licensing	Minimum Age	Registration	Insurance	Helmet
Motorcycle	Class M (150cc or More)	16	Required	Required	Not Required
Motor-Driven Cycle	Class L (<150cc)	16	Required	Required	Not Required
Moped	Any License	16	Required	Required	Not Required

_{(Sources: https://www.ilsos.gov/publications/pdf_publications/dsd_a112.pdf;
https://www.ilsos.gov/publications/pdf_publications/dsd_x140.pdf;
https://www.ilsos.gov/departments/vehicles/title_and_registration/faq.html)}