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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.
Harley-Davidson engines are now made at Harley-Davidson Motor Company's Pilgrim Road Powertrain Operations facility in Menomonee Falls, Wisconsin. The company's founders started making smaller flathead motorcycle engines individually by hand and fitted to bicycles in the 10 ft x 15 ft wooden barn in Milwaukee that was the Harley-Davidson ...
File:Harley-Davidson Museum February 2024 14 (Engine Room--Evolution, 1984-99).jpg. Add languages. Page contents not supported in other languages. File; Talk;
1983–1984 Street model using XR racing cylinder head and other XR engine parts. XL, Evolution, "EVO" 53.9 cu in (883 cc), 1,100 cc (6.1 cu in) (1986–1987), 73 cu in (1,200 cc) (1988–) 1986–2022 The first year of the new Sportster to have the Evolution overhead-valve engine, alloy heads XL883N, Iron: 53.9 cu in (883 cc) 2009–2022
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 exhaust, better porting, and stronger valves and pistons.
2010 Harley-Davidson XR1200 Sportster. In the 2008 model year, Harley-Davidson released the XR1200 Sportster in Europe, Africa, and the Middle East. The XR1200 had an Evolution engine tuned to produce 91 bhp (68 kW), four-piston dual front disc brakes, and an aluminum swing arm.
Buell saw the newly developed 1203 cc Harley-Davidson Evolution engine being used in their 'Sportster' model line as solid base platform to further tune the performance and handling qualities of his bikes. The RR1200 model was introduced during 1988 with a redesigned chassis to incorporate a modified version of this different engine design.
After further testing and development, Davis's design was introduced in June 1983 as the 1984 Harley-Davidson FXST Softail. [6] This basically was an FXWG Wide Glide, but instead of the visible twin shocks, the softail swingarm was used, with the shocks hidden under the gearbox, which at the time was still 4-speed with kickstarter and chain.