Okla. Stat. tit. 47, § 1-133.2
Moped.
A "moped" is any motor-driven cycle with a motor which produces not to exceed two brake horsepower and which is not capable of propelling the vehicle at a speed in excess of thirty-five (35) miles per hour on level ground. If an internal combustion engine is used, the displacement shall not exceed fifty (50) cubic centimeters, and the moped shall have a power drive system that functions directly or automatically without clutching or shifting by the operator after the drive system is engaged.
Laws 2003, SB 633, c. 411, § 4, November 1, 2003; Amended by Laws 2019, SB 337, c. 315, § 1, eff. November 1, 2019 (superseded document available).