Progressive American Flat Track
Mission AFT SuperTwins is the Grand National Championship, one unbroken title since 1954.
Mission AFT SuperTwins is American Flat Track’s premier class. Its motorcycles combine purpose-built racing chassis with production-based twin-cylinder engines.
Grand National Championship since 1954: GNC 1954–2008, AMA Pro Flat Track 2009–2016, American Flat Track 2017 on. AFT Twins 2017–19, AFT SuperTwins 2020–25 and Mission AFT SuperTwins 2026.
Mission AFT SuperTwins engines originate in production street motorcycles. Teams build the racing chassis around them.
Class rules: 2026 AFT rulebook, February 10, 2026 edition.
Mission AFT SuperTwins riders must be at least 18 and hold an AFT GNC rider license. A Kicker AFT Singles rider can step up only with a provisional Mission AFT SuperTwins license and an approved wildcard entry, at no more than six events a season.
In the standard format, riders set times in practice and two qualifying sessions. The fastest 32 race in two eight-lap heats of 16. The top six from each heat go to the Main Event, and the next ten get one more chance in the Last Chance Qualifier (LCQ), where the top four go through.
The Mission AFT SuperTwins Main Event is a timed race plus two laps: 8 minutes on a Short Track, 10 on a TT or Half-Mile and 14 on a Mile.
Some Mission AFT SuperTwins events use the Triple Challenge instead: three races of 10, 15 and 20 laps, with the winner decided across all three.
Formats can change for a specific event, so each event’s own schedule is the final word.
Each event page has that event’s schedule and results.
How a race day worksFull 2026 schedule2026 class rules (PDF)
Counted from the official session list of each Mission AFT SuperTwins round in 2026 (16 rounds). Each round’s own list is the final word.
Briar Bauman won 6 rounds on the Harley‑Davidson XG750R in 2026, the first at the Ventura Short Track. The Harley‑Davidson XG750R won 9 in all.
Nine wins on the Harley-Davidson XG750R took the 2025 AFT SuperTwins Manufacturer Championship.
Race-only model
Dallas Daniels won 6 rounds on the Yamaha MT‑07 in 2026, the first at the Atlanta Short Track.
2027 model · Liquid-cooled inline-twin CP2 engine, DOHC
Davis Fisher won the Springfield Mile II.
2027 model · LC8c parallel-twin engine
Race bike
Dan Bromley finished 8th at the Royal Enfield Short Track at DAYTONA I, the best Suzuki GSX‑8S result of 2026.
2026 model · 4-stroke, liquid-cooled DOHC parallel-twin engine
Morgen Mischler finished 8th at the Parts Unlimited ThrottleFest, the best Aprilia Tuareg 660 result of 2026.
Four-stroke, liquid-cooled parallel twin-cylinder engine
Trent Lowe finished 2nd at the Springfield Mile I, the best Honda CB750 Hornet result of 2026.
2026 model · Liquid-cooled parallel-twin four-stroke engine
Dalton Gauthier finished 3rd at the Jackpine Gypsies Super TT, the best Royal Enfield Twins FT result of 2026.
Raced by Moto Anatomy X Royal Enfield.
Race-only model
Race bike
Jeffrey Carver finished 5th at the Super.com Lima Half-Mile II, the best Kawasaki Ninja 650 result of 2026.
2027 model · Parallel-twin DOHC engine
Mission AFT SuperTwins engines come from production-based, four-stroke, twin-cylinder street motorcycles, and AMA Pro Racing approves each one. At least 400 motorcycles with that engine must have been available through U.S. dealers.
Liquid-cooled engines can be 649cc to 800cc and air-cooled engines 649cc to 900cc, and teams may change bore and stroke to fit. Turbochargers and superchargers are banned.
Parts the class rules don’t control may be modified, removed or replaced.
Mission AFT SuperTwins is the Grand National Championship, one unbroken title since 1954. Dallas Daniels, 2026 Grand National Champion.
In the standard format, points come from the Main Event result; in Triple Challenge, they come from the overall result across its three races.
Top 3 of 38 riders in the official 2026 Mission AFT SuperTwins standings.
See the official standings for each rider’s position, points and race results.
Watch AFT races live or on demand with a FloRacing subscription. Watch past races on FansChoice.tv.
