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Recirculating oil system introduced on all H-D engines in 1936, R became W to denote this. WLA and WLC were military models, WR was a racing model Servi-Car: 45.1 cu in (739 cc) flathead 1932–1936 (R-series engine) 1937–1973 (W-series engine) From 1964, the first Harley-Davidson to have electric starting. [2] Model K and KK
William S. Harley and Arthur Davidson developed the first prototype of a Harley Davidson motorcycle in 1903. The engine was designed according to the system De Dion-Bouton, had a displacement of 167 cc and made about 2 ps (1.5 kW).
The Harley-Davidson RL 45 is a model of the R-series range produced from 1932 to 1936, preceded by the DL range (1929–1931), which was Harley-Davidson's first 45 cubic-inch and first flathead V-twin motorcycle, and succeeded in 1937 by the WL. The R-series range included 45-solo, R, RL and RLD models.
In 2008, Harley added anti-lock braking systems and cruise control as a factory installed option on all touring models (standard on CVO and Anniversary models). [142] Also new for 2008 is the 6-US-gallon (23 L; 5.0 imp gal) fuel tank for all touring models. 2008 also brought throttle-by-wire to all touring models.
The Harley-Davidson Sportster is a line of motorcycles produced continuously since 1957 by Harley-Davidson. Sportster models are designated in Harley-Davidson's product code by beginning with "XL". In 1952, the predecessors to the Sportster, the Model K Sport and Sport Solo motorcycles, were introduced.
The model number breaks down as follows: W : the W family of motorcycles. Harley-Davidson (except in very early models) gives a letter designation for each model family. The W series at the time was the newest incarnation of the 45-cubic-inch (740 cm 3) flathead motor, and was developed from the earlier R family 1932–1936.
By 1906, they had produced a reliable and road-worthy motorcycle that they named the Harley-Davidson. Harley received a degree in mechanical engineering from the University of Wisconsin–Madison in 1907. [4] [5] He co-founded Harley-Davidson with Arthur Davidson in 1903 and served as chief engineer and treasurer until his death in 1943.
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