Model 9A
The 1-cylinder, 4-cycle, air-cooled engine has a 3 5/16-inch bore and a 4-inch stroke. The cylinder casting and its integral head are of heat-treated gray iron, and the heat-treated, ground piston is fitted with three rings and a hollow steel wrist pin. An I-beam section of chrome-vanadium steel, fitted at both ends with phosphor-bronze bushings, serves as the connecting rod. Separate camshafts for the intake and exhaust valves are driven by gears in the magneto drive train. The overhead intake valve is of nickel ..read more
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he 1912 Harley-Davidson X8A motorcycle was a far more advanced model than Harley-Davidson’s first motorcycle, built in 1903. That one was little more than a bicycle with a single-cylinder three-horsepower engine mounted within the frame tubes. Though the V-twins that would make the company famous appeared six years later, single-cylinder machines continued to represent the bulk of Harley’s sales. By 1912, public demand for more power was answered with the X8A, which was powered by a 30-cubic-inch single producing 4.3 horsepower.
ENGINE: IOE Single
Bore x Stroke: 3.5 x 3.3125in (89 x 84mm)
Displacement: ..read more
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The first Harley Davidson Motor Company factory was built in 1906 on Chestnut Street. It was a modest 40 by 60 foot single story wooden structure. Chestnut Street was later renamed Juneau Avenue, and though the original structure was replaced, this location remains the Motor Company’s corporate headquarters to this day. A total of 50 motorcycles were produced in 1906.
The following year, 1907 brought about much change for the fledgling company. William S. Harley graduated from the University of Wisconsin-Madison with a degree ..read more
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Two years after the first Harley-Davidson had chugged its way along the streets of Milwaukee, the 1905 Harley-Davidson made its appearance.
Power from the 24.74-cubic-inch motor was enough to propel the machine to a reported 25 mph or so. By that time, their numbers had also increased dramatically: Eight of the shiny black machines had been built during 1904, with another sixteen hitting the streets in 1905.
The tall lever along ..read more
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