Harley Davidson 1903

William S. Harley and Arthur Davidson already built small engine for there bicycles during 1901, later on with the collaboration of Ole Evinrude they developed two more engines, From the wooden shed at 38ts street and Highland Avenue built by the carpenter William C. Davidson, father of the Davidson brothers came out this second (some say first) prototype motorcycle with 25 ci. (405 cc) 3 HP engine which had adequate performance and reliability with an auto (Atmospheric) intake valve and cam driven exhaust valve, from this bike H-D developed there first commercial product during 1905...