It was now time to begin a new and improved second-generation machine. The first “real” Harley-Davidson motorcycle had a bigger engine, almost 25 cubic inches.
The bikes advanced loop-frame and bigger engine marked the path to future motorcycle designs.
The boys received assistance from Ole Evenrude, inventor, known for the invention of the first outboard motor.
The prototype, assembled in a shed in the Davidson’s backyard, had parts mostly made and fabricated at the West Milwaukee rail shop where oldest brother William A. Davidson was then a toolroom foreman.
Completed in September of 1904, the motorcycle raced in State Fair Park. Placing fourth, it was the first documented appearance of a Harley-Davidson.