The 2023 Sprint GrandNationals

IKF Duffy Trophy The ‘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 20-22, 2023

VENUE: Speedsportz Racing Park

Tentative Schedule

REGISTRATION

Race Classes

IAME Engines will use current SKUSA Rules.

Micro Swift (7-10*)

IAME Mini Swift 60 + 16mm header / 220 lbs
Evinco Blue
#10-99

LO206 Cadet (7-13*)

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

Mini Swift (9-13*)

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

LO206 Junior (11-15*)

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

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 Senior (14+)

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

KA100 Senior (14+)

IAME KA100 / 355 lbs
Rok VLR / 370 lbs
Evinco Blue (7.10 R)
#900-999

LO206 Master (30+)

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

KA100 Master (21+//30+)

IAME KA100 / 400 lbs // 390 lbs
Rok VLR / 415 lbs // 405 lbs
21+ drivers must weight 200+ lbs in racing gear.
Evinco Blue (7.10 R)
#500-599

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

Race Fuel/Oil

LO206: TBA.
All other 2-stroke classes: Aspen Sport / Elf HTX909

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.