page_title: Harley-Davidson
section_title: Revolution engine
hierarchical_section_title: Harley-Davidson / Motorcycle engines / Revolution engine
caption_attribution_description: Harley-Davidson Revolution water cooled motorcycle engine. Photo Vaxholm May 2012
context_page_description: Harley-Davidson, Inc., H-D, or Harley, is an American motorcycle manufacturer founded in 1903 in Milwaukee, Wisconsin. Along with Indian it was one of two major American motorcycle manufacturers to survive the Great Depression. The company has survived numerous ownership arrangements, subsidiary arrangements, periods of poor economic health and product quality, and intense global competition to become one of the world's largest motorcycle manufacturers and an iconic brand widely known for its loyal following. There are owner clubs and events worldwide, as well as a company-sponsored, brand-focused museum.
  Harley-Davidson is noted for a style of customization that gave rise to the chopper motorcycle style. The company traditionally marketed heavyweight, air-cooled cruiser motorcycles with engine displacements greater than 700 cc, but it has broadened its offerings to include more contemporary VRSC and middle-weight Street platforms.
  Harley-Davidson manufactures its motorcycles at factories in York, Pennsylvania; Milwaukee, Wisconsin; Kansas City, Missouri; Manaus, Brazil; and Bawal, India. Construction of a new plant in Thailand began in late 2018.
context_section_description: The Revolution engine is based on the VR-1000 Superbike race program, developed by Harley-Davidson's Powertrain Engineering Porsche only helped them make it for street use . It is a liquid cooled, dual overhead cam, internally counterbalanced 60 degree V-twin engine with a displacement of 69 cubic inch (1,130 cc), producing 115 hp (86 kW) at 8,250 rpm at the crank, with a redline of 9,000 rpm. It was introduced for the new VRSC (V-Rod) line in 2001 for the 2002 model year, starting with the single VRSCA (V-Twin Racing Street Custom) model. The Revolution marks Harley's first collaboration with Porsche since the V4 Nova project, which, like the V-Rod, was a radical departure from Harley's traditional lineup until it was cancelled by AMF in 1981 in favor of the Evolution engine.
  A 1,250 cc Screamin' Eagle version of the Revolution engine was made available for 2005 and 2006, and was present thereafter in a single production model from 2005 to 2007. In 2008, the 1,250 cc Revolution Engine became standard for the entire VRSC line. Harley-Davidson claims 123 hp (92 kW) at the crank for the 2008 VRSCAW model. The VRXSE Destroyer is equipped with a stroker (75 mm crank) Screamin' Eagle 79 cubic inch (1,300 cc) Revolution Engine, producing more than 165 hp (123 kW).
  750 cc and 500 cc versions of the Revolution engine are used in Harley-Davidson's Street line of light cruisers. These motors, named the Revolution X, use a single overhead cam, screw and locknut valve adjustment, a single internal counterbalancer, and vertically split crankcases; all of these changes making it different from the original Revolution design.
caption: Revolution engine in V-Rod
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