| In 1901, the 21 year-old William S. Harley | | | | through the Milwaukee hills without pedal |
| had created the blueprint of an engine that | | | | assistance. Harley and Davidson developed |
| was designed to fit in a conventional | | | | further their motor after that |
| bicycle. Two years later, William together | | | | experience.Immediately, they have created a |
| with his friend Arthur Davidson started and | | | | bigger engine (405 cc or 24.74 cubic inches) |
| developed a one-cylinder engine that was | | | | that was become the very first and real |
| installed on a conventional bicycle during | | | | Harley-Davidson motorcycle. Meanwhile, the |
| that time. However, this motorized-bicycle | | | | first Harley-Davidson factory was in a 10 x |
| was proved to be incapable of climbing | | | | 15-foot wooden shed. |