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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 .
The Harley-Davidson Sportster is a line of motorcycles produced continuously since 1957 by Harley-Davidson. Sportster models are designated in Harley-Davidson's product code by beginning with "XL". In 1952, the predecessors to the Sportster, the Model K Sport and Sport Solo motorcycles, were introduced.
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.
In 2021, Harley-Davidson launched the Sportster S model, with a 121 hp engine and 228 Kg ready-to-ride weight. [152] The Sportster S was one of the first Harleys to come with cornering-ABS and lean-sensitive traction control. [153] The Sportster S is also the first model under the Sportster nameplate since 1957 to receive a completely new engine.
Harley-Davidson engines are a line of engines manufactured since 1903 in Milwaukee, Wisconsin by the Harley-Davidson company for use in its motorcycles.Harley-Davidson engines are now made at Harley-Davidson Motor Company's Pilgrim Road Powertrain Operations facility in Menomonee Falls, Wisconsin.
Lindsay, Brooke (November 5, 2006), "Harley's Sportster: From a Wild Child to a Grown-Up in 50 Years", The New York Times As grim as those days were in terms of performance, it was an era that produced two of the Sportsters considered most unusual and sought-after by collectors, the 1977-78 XLCR Cafe Racer and the 1983-85 XR1000. Both of these ...
In fact, Harley Davidson owner's manuals and shop manuals of the day specified that normal oil consumption varied from 250 to 500 miles per quart. Much of this was due to the 1940s technology whereby the old stock Bohnalite pistons were fitted with single-piece oil scraper rings.
The XR-1000 used XR-750 heads, but kept the Sportster engine, frame and other equipment. [10] Costing nearly twice the price of a base model Sportster XL, the XR-1000 sold poorly and many performance enthusiasts simply bought an XL and upgraded the heads, carburetors and exhaust themselves at significantly less total cost. [ 10 ]