1927-1929 Harley Davidson
In 1927 Harley-Davidson BA motorcycle featured a 21-cubic-inch single-cylinder engine. The resulting lack of power negated the need for front brakes.
There was a lot of working room around the little 21-cubic-inch flathead single, which was a selling point in the late 1920s.
In 1928 the first Harley-Davidson two cam engine is made available to the public on the JD series motorcycles. The bike is capable of top speeds between 85 – 100 mph.There were two versions of Harley Davidson JDH motorcycles providing either 1000cc or 1200cc engines.
Front wheel brakes are now available on all Harley-Davidson motorcycles.
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 1973.
- 1940 – 1949 Harley Davidson
- 1915-1916 Harley Davidson Model 11-12
- 1919 Harley Davidson Model 19
- 1920 Harley Davidson Model 20








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