Yea thanks Suzuki
While still defo not the "first" they still beat Suzie by at least a decade lol;
Breene-Taylor Engineering, a Los Angeles-based manufacturer of airplane parts, announced the availability of the Whizzer Model "D" Bicycle Motor. This kit sold for $54.95 and included an air-cooled, four-cycle engine that was capable of producing 1.375 horsepower as well as a 2/3 gallon fuel tank. Approximately 1000 Model "D" motors were made and sold.