Menu

2021-Grands-ScheduleThe 2021 Sprint GrandNationals

IKF Duffy TrophyThe ‘Duffy’ is the most prestigious trophy in grassroots kart racing, and once a year the International Kart Federation holds its annual IKF Sprint GrandNationals. The names who call themselves Duffy winners are a who’s who of motorsports and the distinction of being an IKF national champion solidifies any racer’s legacy in the sport.

DATE:  October 15-17, 2021

VENUE:  Prairie City Kart Track

EVENT SCHEDULE

PRE-Entry Open NOW

Pit Passes will be sold on site.

 

Event Format

  • Thursday – Move-In, Unofficial Practice
  • Friday – Official Practice.
  • Saturday – Morning Warm-Up, Qualifying and 2 Heats.
    [Progressive]  You will start each heat based on previous finish, post penalties and tech.
  • Sunday – Morning Warm-Up, 1 Heat and Finals
    You will start the final based on finish in Heat 3, post penalties and tech.

Pre-Event Practice

KPX will be hosting their Season Finale at Prairie City the weekend before.
There will be an unofficial Thursday Practice.

 

Race Classes

IAME Engines will use current SKUSA Rules.

Mini Swift (9-13*)

  • IAME Mini Swift 60 / 245 lbs
  • Evinco Blue
  • #100-199

LO206 Cadet (7-13*)

  • Briggs LO206 / 240 lbs Green Slide
  • Evinco Blue
  • #200-299

KA100 Junior (11-15*)

  • IAME KA100 / 320 lbs  +22mm Factory Header
    This class is IAME KA100 only
  • Evinco Blue (7.10 R)
  • #800-899

LO206 Junior (11-15*)

  • Briggs LO206 / 310 lbs Black Slide
  • Evinco Blue (6.0 R)
  • #400-499

KA100 Senior (14+)

  • IAME KA100 / 360 lbs
    Rok VLR / 360 lbs
  • Evinco Blue (7.10 R)
  • #900-999

LO206 Senior (14+)

  • Briggs LO206 / 360 lbs
  • Evinco Blue (6.0 R)
  • #600-699

LO206 Master (30+)

  • Briggs LO206 / 390 lbs
  • NEW Evinco Blue (6.0 R)
  • #300-399

LO206 Grand Master (50+)

  • Briggs LO206 / 390 lbs
  • Evinco Blue (6.0 R)
  • #500-599

80cc Shifter (14+)

  • Honda CR 80/85  / 375 or 395(w/FWB) lbs
  • NEW Evinco Blue (7.10 R)
  • #10-99

*All drivers 12yo and under must wear a Neck brace & SFI-approved chest protector.

 

Race Fuel

  • LO206: TBA
  • All other 2-stroke classes:  Sunoco 110 and Elf HTX 909 .
  • Sunoco will be available at the track. Use of unauthorized/specified fuel or oil will result in exclusion from event with no appeal. Fuel tests may be conducted at any time during event. Failure to provide a requested sample will result in immediate exclusion from event with no recourse.

 

Tire Information

  • ALL event tires are Evinco, including practice.
  • All classes must use same tires for the duration of event (all competition sessions).
  • Rain tires must be MG only.

 

 

 

2019 IKF GrandNationals Highlights