F100

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For further rules and more detailed explanations of the rules listed below, please visit the F100 Rule Supplement

FJ1

(Formerly F100 Junior Novice)

(Non-points developmental class)

  • Requires level 1 license
  • Engine @ min. lbs:
    • Yamaha KT-100
      • KPV/HPV/RLV 2 @ 295 lbs
      • 4 hole can @ 275 lbs
    • KPV/HPV
      • KPV/HPV/RLV 2 @ 310 lbs
    • Other 100cc piston port engines please email F100 at formula100kartingseries@gmail.com, for rules and technical specifications. Other 100cc piston port engines, such as a TKM BT82, ARC 100cc or PRD RK100, are allowed in level 1 classes.
  • Chassis
    • Junior or full size kart chassis only
      • No cadet kart chassis
    • Must conform to NKA Trakbook chassis rules
  • Tires
    • Approved tires (see section 6a for a list of approved tires)
      • 4.5 or 4.6/10.0x5 front
      • 6.0/11.0x5 or 7.1/11.0x5 rear
  • Clutch
    • KT-100
      • Open, axle or crankshaft clutch
    • KPV/HPV
      • Horstman EXPD or IAME spec clutch
        • 5500 rpm maximum stall speed
          • Subject to clutch stall speed test
  • Exhaust
    • KT-100
      • 4 hole can (RLV 7548 or 7540)
      • KPV 2 flex length 11.875” to 12.375” with Walbro WB3a carburetor, RLV 9110 header required
      • HPV 2 flex length 12” to 12.5” with Walbro WB3a carburetor, RLV 9110 header required
      • RLV 2 flex length with 9.375” to 9.875” with Walbro WB3a carburetor, RLV 9110 header required
    • KPV/HPV
      • KPV 2 flex length 11.875” to 12.375” with Walbro WB3a carburetor
      • HPV 2 flex length 12” to 12.5” with Walbro WB3a carburetor
      • RLV 2 flex length 9.375” to 9.875” with Walbro WB3a carburetor
  • Fuel
    • Please see section 3A

FJ2

presented by: EMPIRE KARTS

(Formerly F100 Junior)

  • Invitation/approved ONLY, requires level 2 license
  • Engine @ min. lbs:
    • Yamaha KT-100
      • KPV/HPV/RLV 2 @ 295 lbs
    • KPV/HPV
      • KPV/HPV/RLV 2 @ 310 lbs
  • Chassis
    • Junior or full size kart chassis only
      • No cadet kart chassis
    • Must conform to NKA Trakbook chassis rules
  • Tires
    • Bridgestone YLC, YKC or YHC
      • 4.5/10.0x5 front
      • 6.0/11.0x5 rear
  • Clutch
    • KT-100
      • Open, crankshaft clutch only
    • KPV/HPV
      • Horstman EXPD or IAME spec clutch
        • 5500 rpm maximum stall speed
          • Subject to clutch stall speed test
  • Exhaust
    • KT-100
      • KPV 2 flex length 11.875” to 12.375” with Walbro WB3a carburetor, RLV 9110 header required
      • HPV 2 flex length 12” to 12.5” with Walbro WB3a carburetor, RLV 9110 header required
      • RLV 2 flex length with 9.375” to 9.875” with Walbro WB3a carburetor, RLV 9110 header required
    • KPV/HPV
      • KPV 2 flex length 11.875” to 12.375” with Walbro WB3a carburetor
      • HPV 2 flex length 12” to 12.5” with Walbro WB3a carburetor
      • RLV 2 flex length 9.375” to 9.875” with Walbro WB3a carburetor
  • Fuel
    • Please see section 3A