GNC1
GNC1 was the premier class in the 2015-16 AMA [Grand National Championship] for professional motorcycle flat track racing in the United States.
The GNC1 class debuted in the 2015 season, replacing the previous Expert division and combining both singles and twins events in a unified championship.
In GNC1, twin-cylinder motorcycles were the primary machines and were used for Mile and Half-Mile circuits while single-cylinder motorcycles were used for Short Track and TT events. Since 2017 the GNC1 class has been replaced by the new AFT Twins class, featuring twin-cylinder motorcycles at all events.
GNC1 Twins
Eligible engines
As of May 20, 2016- Aprilia
- *RSV 1000 R
- *RXV 550 / SXV 550
- BMW [F series parallel-twin|BMW F800]
- Buell Motorcycle Company
- *XB9
- *XB12
- *XB3
- Ducati
- *Desmodue 803
- *Desmodue Evo 1100
- *Desmoquattro 748
- *Testastretta 749, 821, 848, 939
- Harley-Davidson
- *XR-750
- *XG750
- *883
- *XR1200
- Honda
- *NC700X
- *RS750
- Indian
- *Scout FTR750
- *Scout 60
- Kawasaki
- *Ninja 650R
- KTM
- *LC8
- Suzuki
- *SV650
- *SV1000
- *TL1000
- Triumph
- *Bonneville 865
- *Bonneville 900
- Yamaha
- *TDM
- *FZ-07
Engine displacement
550-1250cc with the following restrictions: racing-only engines may not exceed 750cc, engines greater than 1000cc are restricted to air/oil cooled.Minimum weight
300 pounds including fuel.Tires
Dunlop DT3 19-inch flat track tires.Fuel
Sunoco Supreme 112GNC1 Singles
Eligible motorcycles
- Honda CRF450R
- Husqvarna FC450
- Kawasaki KX450F
- KTM 450 SX-F
- KTM 450 XC
- Suzuki RM-Z 450
- Yamaha YZ450F
- Zaeta 450DT