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Carburetors were standard on Sportster engines until 2007, when they were replaced by the Delphi Electronic Sequential-Port Fuel Injection (ESPFI) system. A simplified derivative of the engine was used on the Buell Blast entry-level motorcycle from 2000 to 2009. The Sportster engine as used on the Buell Blast was in most ways similar to the one ...
Harley-Davidson engineer Mark Miller created the VR-1000 engine with design input from Erik Buell, Cosworth, and Jerry Branch of Branch Flowmetrics; the cylinder head and electronic fuel injection were designed by Roush Industries which also built the series production engines. [13]
Lubrication is dry sump, the exhaust passes under the engine with a 2 into 1 layout. Distribution takes place via two valves controlled by pushrods and rocker arms with hydraulic valve lifter and hydraulic valve clearance compensation. Powering it is an electronic fuel injection system, with a 45mm throttle body.
The XR1200 was the first Harley-Davidson to utilize Down Draft DDFI II fuel injection. To be released as a late 2006 model. Introduction of helical gears in transmission (2nd-5th). 2007 Fuel injection replaces carburetion on all models. 2008 front axle enlarged from 3/4 inch to 25 mm, rear axle decreased from 1 inch (25.4 mm) to 25 mm
Each motorcycle was individually numbered and came in one of two colors, Mirage Pearl Orange or Vivid Black. Also in 2007, electronic fuel injection was introduced to the Sportster family, and the Nightster model was introduced in mid-year. In 2009, Harley-Davidson added the Iron 883 to the Sportster line, as part of the Dark Custom series.
The X1 Lightning was the successor to the S1 Lightning line. It used the Thunderstorm heads, fuel injection (Dynamic Digital Fuel Injection), and incorporated larger fuel tanks as well as completely different body designs. The most recognizable frame piece was the brushed aluminum tail section that swept upward and back underneath the two-up seat.