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  2. Harley-Davidson Ironhead engine - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson_Ironhead...

    The ironhead was a Harley-Davidson motorcycle engine, so named because of the composition of the cylinder heads (Iron instead of Aluminium). The engine is a two-cylinder, two valves per cylinder, pushrod V-twin. It was produced from 1957 until 1985 and was replaced by the Evolution engine in 1986.

  3. Harley-Davidson Shovelhead engine - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson_Shovelhead...

    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 ...

  4. Harley-Davidson - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson

    Harley-Davidson, Inc. (H-D, or simply Harley) is an American motorcycle manufacturer headquartered in Milwaukee, ... Harley's XA cylinder heads ran 100 °F ...

  5. Flathead motorcycles - Wikipedia

    en.wikipedia.org/wiki/Flathead_motorcycles

    Flathead motorcycles are a type of bike that was a standard for pre-war motorcycles, in particular US V-twins such as Harley-Davidson and Indian, some British singles, BMW flat twins and Russian copies thereof. [1] Flathead motorcycles have side-valves contained within the engine block, instead of in the cylinder head, as in an overhead valve ...

  6. Harley-Davidson engine timeline - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson_engine...

    That first engine was a single cylinder model, based on the French developed De Dion-Bouton internal combustion engine. The company was soon fully committed to producing its own proprietary engine designs, and by 1909 the first Harley-Davidson V-Twin engine had been designed and made, setting a template for engine design that continues today.

  7. List of Harley-Davidson motorcycles - Wikipedia

    en.wikipedia.org/wiki/List_of_Harley-Davidson...

    Overhead-valve engines, iron heads (1970–1971), alloy heads (1972–1985) XLCR: 61 cu in (1,000 cc) 1977–1978 OHV engines, iron heads, solo seats, snake exhaust, also includes reverse shifting pedal, and rear pegs. XR1000 61 cu in (1,000 cc) 1983–1984 Street model using XR racing cylinder head and other XR engine parts.

  8. Harley-Davidson Sportster - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson_Sportster

    The Harley-Davidson Sportster is a line of motorcycles produced continuously since 1957 by ... dual plug cylinder heads with single fire ignition and a 10:1 ...

  9. Harley-Davidson Knucklehead engine - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson...

    The engine is a two-cylinder, 45 degree, pushrod actuated overhead valve V-twin engine with two valves per cylinder. It was the third basic type of V-Twin engine used by Harley-Davidson, replacing the Flathead-engined VL model in 1936 as HD's top-of-the-line model. The engine was manufactured until 1947 and was replaced by the Panhead engine in ...

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