American Flat Track

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American Flat Track is an American motorcycle racing series.^[1] The racing series, founded and sanctioned by the American Motorcyclist Association (AMA) in 1954, originally encompassed five distinct forms of competitions including mile dirt track races, half-mile, short-track, TT steeplechase and road races.^[2][3] The championship was the premier motorcycle racing series in the United States from the 1950s up until the late 1970s.

Following the 2016 season, AMA Pro Racing, the sanctioning body of the series, announced a restructured class system as well as a re-envisioning of the event format. The restructured class system consists of the AFT SuperTwins premier class, the AFT Singles class for young rising stars and later on the AFT Production Twins class featuring production-based, 649-800cc twin-cylinder engines.^{[citation needed]}