A Trip Down Memory Lane Part 2

World War I

In 1917, with America in the war, the military required motorcycles for its war efforts. As Harley Davidson was already used in the police forces and border skirmishes, the choice was obvious. Almost half of all Harley-Davidson motorcycles produced during this period are sold for use by the U.S. military.

Overall, Harley supplied over 20000 motorcycles during WWI. In fact, one day after the signing of the Armistice, Corporal Roy Holtz of Chippewa Falls, Wis., became the first American to enter Germany and he was riding a Harley-Davidson.

By 1920, Harley-Davidson was the largest motorcycle manufacturer in the world, with dealers in 67 countries. In 1921, gas tanks on all models were changed to a distinct teardrop shape. This basic appearance is set for all subsequent Harley-Davidson motorcycles.

It was also entered into a race and it became the very first to win a race at an average speed of over 100 mph. A front brake was added in 1928.

In 1929, the 45 cubic inch V-twin engine (later to be known as the "flathead") is introduced on the D model. The engine proves to be so reliable that variations of it are available on Harley-Davidson motorcycles as late as 1972.

In 1933, an art-deco "eagle" design is painted on all gas tanks. This marks the beginning of graphic designs on Harley-Davidson motorcycles (with the exception of previously special order-only paint schemes). This styling decision was made in part to stimulate the low sales numbers caused by the Great Depression.

The Japanese motorcycle industry is founded as a result of Harley-Davidson licensing blueprints, tools, dies and machinery to the Sankyo Company of Japan. The result is the Rikuo motorcycle.

In 1936 Harley-Davidson introduces the EL, an overhead valve, 61 cubic inch powered bike. With increased horsepower and bold styling changes, the motorcycle quickly earns the nickname of "Knucklehead," due to the shape of its rocker boxes. The same year, the Motor Company introduces a 80 cubic inch side valve engine.