Oregon Revised Statutes Oregon Vehicle Code § 801.348

(1) Is designed to be operated on the ground with not more than three wheels;

(2) Has handlebars and a foot support or seat for the operator's use;

(3) Can be propelled by motor or human propulsion; and

(4) Is equipped with a power source that is incapable of propelling the vehicle at a speed of greater than 24 miles per hour on level ground and: