Sportster engines retained the K/KH design crankcase design, in which the transmission is contained in the same casting as the engine, and driven by the engine with a triple-row #35 chain primary drive and a multi-plate cable-operated clutch. The company used similar cam followers for decades with minor changes, from 1929 to the 1980s.Ī typical 5-gear, foot-shift transmission on an HD Sportster The cam followers used in Sportster engines, K models, big twin side valve models, and the side-valve W model series, were a slightly shorter version of the followers used in the larger motors, but with the same 0.731-inch (18.6 mm) diameter body and 0.855-inch (21.7 mm) diameter roller follower since 1929.
Sportster engines, the 45 cubic inch R, D, G & W Models 1929 side-valve motors, and the 'Big Twin' side-valve motors, which were: the flathead 74.0 cu in (1,213 cc) Models V, VL etc. The original Sportster engine was the Ironhead engine, which was replaced with the Evolution engine in 1986. Sportster motorcycles are powered by a four-stroke, 45° V-twin engine in which both connecting rods, of the "fork and blade" or "knife & fork" design, share a common crank pin. Harley-Davidson 45° V-twin, Sportster Evolution engine An all-new model equipped with the Revolution Max engine called the Sportster S was introduced in 2021, the first motorcycle under the Sportster nameplate to receive a new engine since 1986, and the first Sportster to have an engine not derived from the Model K. The original Sportster line was discontinued in Europe in 2020 due to the engine failing to meet the stricter Euro 5 emissions standards. The first Sportster in 1957 had many of the same details of the KH including the frame, fenders, large gas tank and front suspension. These models K, KK, KH, and KHK of 1952 to 1956 had a sidevalve ('flat head') engine, whereas the later XL Sportster models use an overhead valve engine. In 1952, the predecessors to the Sportster, the Model K Sport and Sport Solo motorcycles, were introduced.
#CHOPPER 2 UP SEAT CODE#
Sportster models are designated in Harley-Davidson's product code by beginning with "XL". The Harley-Davidson Sportster is a line of motorcycles produced continuously since 1957 by Harley-Davidson.
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