SuperNats XXVII

TBA

2025 Winter Series

2025 TBA

2024 Pro Tour

4DAYS

SKUSA Mexico

39DAYS

2024 PKC

19DAYS

2024 TSRS

17DAYS

Next ProKart Challenge Event


PRE-ENTRY OPEN NOW
Will close March 19 at 11:59 PDT
 

Round 1 - Buttonwillow March 23-24, 2024
Buttonwillow Raceway Park
24551 Lerdo Highway
Buttonwillow, CA 93206
(661) 764-5333
Website // Google Maps

California ProKart Challenge

2024 ProKart Challenge Classes
  • UPDATE 2/28 - We will start the season on the new Evinco tire compounds across the board.  Practice tires will not be available until one week before the event.
  • Spec Fuel/Oil for all classes:  Sunoco 112 Supreme / Elf HTX909
    • We are working on sourcing information and will post that soon.
  • Push back bumper will not be required for any classes of the 2024 Pro Kart Challenge.
  • (1) Set of 2024 PKC Stamped Evinco Race Tires per round allowed. Sticker tires are recommended for each round, but not required (used tires ok if they have 2024 PKC stamp).

IAME SWIFT CLASSES

Micro Swift
Engine: IAME Mini Swift 60 + 16mm factory header
Age: 7-10
Weight: 220 lbs
Tires: NEW Evinco Blue 'SK-H2' from SKUSA
Additional Equipment: Neck brace & SFI-approved chestprotector required
Kart # 200-299
Mini Swift
Engine: IAME Mini Swift 60
Age: 9-13
Weight: 245 lbs
Tires: NEW Evinco Blue 'SK-H2' from SKUSA
Additional Equipment: Neck brace required; SFI-approved chest protector required for drivers 12 & under
Kart # 100-199
 

IAME KA100 Classes

KA100 Senior
Engine: IAME KA100
Age: 15+
Weight: 355 lbs
Tires: NEW Evinco Blue 'SK-H2' from SKUSA
Kart # 900-999
KA100 Master
Engine: IAME KA100
Age: 30+
21-29 (200 lb racing weight of driver)
Weight: 390 lbs // 400 lbs (21+)
Tires: NEW Evinco Blue 'SK-H2' from SKUSA
Kart # 200-299
KA100 Junior
Engine: IAME KA100 + 22mm factory header
Age: 12-15
Weight: 320 lbs
Tires: NEW Evinco Blue 'SK-H2' from SKUSA
Additional Equipment: Neck brace required; SFI-approved chest protector required for drivers 12 & under
Kart # 800-899
 

IAME X30 CLASSES

Pro X30
Engine: IAME X30
Age: 15+
Weight: 360 lbs
Tires: NEW Evinco Red 'SK-M2' from SKUSA
Kart # 10-99
X30 Master
Engine: IAME X30
Age: 30+
Weight: 395 lbs
Tires: NEW Evinco Red 'SK-M2' from SKUSA
Kart # 500-599
X30 Junior
Engine: IAME X30 + 22.7mm factory header
Age: 12-15
Weight: 320 lbs
Tires: NEW Evinco Blue 'SK-H2' from SKUSA
Additional Equipment: Neck brace required; SFI-approved chest protector required for drivers 12 & under
Kart # 700-799
 

SSE/KZ CLASSES

Pro Shifter
Engine: SSE/KZ
Age: 15+
Weight: 390 lbs
Tires: NEW Evinco Red 'SK-M2' from SKUSA
Kart # 10-99
Master Shifter
Engine: SSE/KZ
Age: 30+
Weight: 405 lbs
Tires: NEW Evinco Red 'SK-M2' from SKUSA
Kart # 600-699
 

LOCAL OPTIONS CLASSES

OPEN Shifter S125
Appropriate for Novice and Exp. drivers (S1/S2/S3)
Engine: Open to 125cc Shifters
Honda, RoK, etc // No KZ
Age: 15+
Weight: 395 lbs
Tires: NEW Evinco Red 'SK-M2' from SKUSA
Kart # 100-199
OPEN Shifter M125
Appropriate for Novice and Exp. drivers (S4/S4SM)
Engine: Open to 125cc Shifters
Honda, RoK, etc // No KZ
Age: 30+
Weight: 405 lbs
Tires: NEW Evinco Red 'SK-M2' from SKUSA
Kart # 400-499
S5 - Junior Stock Moto
Engine: Spec Honda
Age: 12-15
Weight: 340 lbs
Tires: NEW Evinco Red 'SK-M2' from SKUSA
Additional Equipment: Neck brace required; SFI-approved chest protector required for drivers 12 & under
Kart # 500-599
 
 
We reserve the right to make additional modifications to our rules as experience dictates.