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1957 "Ironhead" overhead-valve engine introduced. [4] 1958 XLH touring high compression model and XLCH sportier "Competition Hot" model introduced. 1967 Electric starting introduced on XLH [5] 1972 "Ironhead" 1,000 cc overhead-valve engine replaces 900 cc. Claimed power was 61 hp (45 kW) @ 6,200 rpm and a top speed of 116 mph (187 km/h) [4]
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.
Also available in the Sportster model beginning in 1986, it was made in the 1,100 cc (67 cu in) displacement until 1988 and is still made in the 883 cc (53.9 cu in) and 1,200 cc (73 cu in) [1] displacements for the Harley-Davidson Sportster, replacing the ironhead Sportster engine.
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 ...
The Revolution engine is based on the VR-1000 Superbike race program, developed by Harley-Davidson's Powertrain Engineering with Porsche helping to make the engine suitable 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 ...
Door draft stoppers are an affordable, low-effort way to block out breezes, noise, light, odors and even bugs. It's a great first step in making sure you tackle your cold problem by blocking cold ...
From the beginning of organised motor sport events, in the early 1900s, until the late 1960s, before commercial sponsorship liveries came into common use, vehicles competing in Formula One, sports car racing, touring car racing and other international auto racing competitions customarily painted their cars in standardised racing colours that indicated the nation of origin of the car or driver.
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