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Flat Track Racing (also known as Dirt Track) dates back to the post WW2 era and is the oldest and most traditional of all the motorcycle racing genre. The famous Springfield Mile, a 25 mile course in Illinois State Fairgrounds, was the main flat track racing course up until 1954, when the American Motorcycle Association (AMA) established the Grand National Championship series.
In 1998, a new 1000cc engine formula was developed and tested during the 1999-2001 race seasons as part of the AMA SuperTracker development series, but was discontinued at the end of 2001, having served its purpose as a development tool.
In 2006, the AMA separated the Grand National Championship series into two series: AMA Grand National Twins Championship and the AMA Grand National Singles Championship. The AMA Grand National Twins Championship events are held over one mile and half mile courses while the AMA Grand National Singles Championship races are held on TT and short track courses.
Up and coming riders can also hone their skills at the AMA Pro Racing's National Hot Shoe series before going on to ride in the national championship events.
The most successful manufacturer in this series is America's Harley Davidson with a record 26 championships under it's belt since 1972.
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