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First of two H-D flat-twin motorcycle designs put into production, first H-D flathead motorcycle. The fork was a trailing link design. D-series (45 solo) 45.1 cu in (739 cc) flathead: 1929–1932 First H-D 45 cubic inch motorcycle, first H-D flathead V-twin motorcycle. R-series (45 solo: R, RL, RLD,) 45.1 cu in (739 cc) flathead 1932–1936
Harley-Davidson Shovelhead engine at the Harley-Davidson Museum. The Shovelhead engine is a motorcycle engine that was produced by Harley-Davidson from 1966 to 1984, built as a successor to the previous Panhead engine. When the engine was first produced, the Shovelhead had a shallower combustion chamber, larger valve drop for both intake and ...
EFI became standard on all Harley-Davidson motorcycles, including Sportsters, upon the introduction of the 2007 product line. [118] In 1991, Harley-Davidson began to participate in the Sound Quality Working Group, founded by Orfield Labs, Bruel and Kjaer, TEAC, Yamaha, Sennheiser, SMS and Cortex. This was the nation's first group to share ...
The Panhead is an overhead-valve Harley-Davidson motorcycle engine, so nicknamed because the rocker covers resembled cooking pans. The engine is a two- cylinder , two- valve -per-cylinder, pushrod V-twin , made in both 61 c.i. (EL) and 74 c.i. (FL, FLH) displacements.
Legendary brands such as Harley-Davidson, Honda, Indian, and Triumph have left indelible marks on motorcycle history. ... Harley-Davidson XR-750. Harley developed the XR-750 in 1970 in response to ...
The knucklehead is a retronym used by enthusiasts to refer to a Harley-Davidson motorcycle engine, so named because of the distinct shape of the rocker boxes. [1] The engine is a two-cylinder, 45 degree, pushrod actuated overhead valve V-twin engine with two valves per cylinder.
Harley-Davidson Evolution engine at the Harley-Davidson Museum. The Evolution engine (popularly known as Evo and sometimes as Blockhead ) is an air-cooled, 45-degree, V-twin engine manufactured from 1984 by Harley-Davidson for the company's motorcycles.
The Servi-Car used variations of Harley-Davidson's 45 cubic inch flathead. From 1932 to 36, the Servi-Car used the engine from the solo R model. [1] It was changed in 1937 to the engine used in the W model, which differed mainly in having a recirculating oil system instead of the constant-loss system of the R. [2] [7] The "W" flathead engine continued until the end of production in 1973 ...