Here is a creation legotechnicmotorcycle by moc nemooz of the AMA Flat track motorbike
The American Flat Track Series, formerly known as the AMA Grand National Championship, is an American motorcycle racing series.The race 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. The championship was the premier motorcycle racing series in the United States from the 1950s up until the late 1970s when, supercross events held in easily accessible major league stadiums became more popular.
Following the 2016 season, the AMA announced a restructured class system as well as a re-envisioning of the event format. The restructured class system consists of the AFT Twins premier class, the AFT Singles class for young drivers, and the AFT Production Twins class featuring production-based, 649-800cc twin-cylinder engines.