American Flat Track
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.
[citation needed] In the years prior to World War II, the Class C championship helped fuel an intense rivalry between Harley-Davidson and Indian, the two major American manufacturers of the period.
From 1946 to 1953, the AMA Grand National Champion was crowned based on the results of a single race, the Springfield Mile held at the Illinois State Fairgrounds Racetrack.
In the 1960s, British manufacturers seeking to bolster sales in the burgeoning American motorcycle market, began to compete in the championship.
[8][9] New regulations for 1969 eliminated the displacement penalty for overhead valve engines; in dirt track events brakes were permitted for the first time.
Mann would win a second crown for BSA in 1971 before the British motorcycle industry collapsed in the face of stiff technological competition from Japanese manufacturers.
Honda followed with three consecutive national championships by Bubba Shobert before they withdrew in 1987, leaving Harley-Davidson once again as the sole major manufacturer in the series.
[17] The motorcycle road racing technology of the late 1970s featured engines with power in excess of what the frames and tires of the day could handle.
As Grand Prix motorcycle racing evolved into its current MotoGP formula with electronic traction control limiting rear wheel sliding, the advantage once held by former dirt trackers has been diminished.
Since 1989 the Camel Pro Series reverted as title sponsor for the Grand National Championship; the sponsorship lasted until the end of 1992 season.
[22] New dirt track classes were also introduced designed to attract young riders to the sport and, new rules for machinery were adopted in an effort to make it easier for motorcyclists to compete with motorcycles readily available from manufacturers.
NBCSN will air the championship tape-delayed in prime weekend time slots and all live event coverage is available via TrackPass on NBC Sports Gold.
AFT SuperTwins is the pinnacle of dirt track motorcycle racing globally, and has been since the professional ranks were formalized as the Grand National Championship in 1954.
Riders in this class represents a unity of elite teams and the most-skilled athletes who compete at every round of AFT competition.
Racing at speeds faster than 115 mph, the stars of tomorrow battle it out on motorcycles produced by Honda, Husqvarna, Kawasaki, KTM, Suzuki, Yamaha and Zaeta.
