SuperNats XXII


2019 Winter Series


2018 Pro Tour


PKC California


PKC Texas


Can-Am PKC


Next ProKart Challenge Event


Will close March 26th at 6am.

Round 2 - Streets of Willow March 30-31, 2018
Willow Springs
3500 75th Street West
Rosamond, CA 93560
(661) 256-6666
Google Maps

Event Bulletin Board

  • 3/15/18 - Our customers requested that we run the track CCW, but after reviewing all of the speed and safety issues that are created by running that direction, we have decided to run up the hill as we did last year.  
  • 3/14/18 - PRE-TECH is mandatory PRIOR to taking the track for your first practice session for this event (whether it be Friday or Saturday morning), and you MUST get a sticker from Tech showing you passed PRE-TECH
  • 3/9/18 - Track direction updated to CCW, "down the hill"

California ProKart Challenge

First Winners of 2018 California ProKart Challenge Decided
Wednesday, 07 February 2018 12:24

Defending S1 champion Billy Musgrave began the 2018 season with victory in Buttonwillow (Photo:

The Superkarts! USA schedule on the west coast kicked off with the opening event of the California ProKart Challenge on February 2-3 at the Buttonwillow Raceway Park. The SKUSA flagship regional program welcomed over 150 drivers to the challenging 7/10-mile course in Buttonwillow, California. The weather was perfect for racing, and the now 12 different categories featuring Honda and IAME powerplants raced into the amazing sunset as the first event closed. The busy day of racing on Saturday featured seven new winners at the California PKC.
California ProKart Challenge Set to Kick Off 2018
Thursday, 25 January 2018 10:30

Start of S3/S5 Main Event in 2017 (photo:

The 14th season of the California ProKart Challenge is set to begin February 2-3 at the Buttonwillow Raceway Park. Round one of the six-race championship series kicks off the flagship regional program for Superkarts! USA, coming off a successful inaugural SKUSA Winter Series event in Florida. The 2018 season for the California PKC program is a year of additions and changes based on the progression of the SKUSA organization and the sport itself. Among the changes include an expansion to 12 classes, a new numbering system to help both staff and spectators, and new trophies to be presented during the award ceremonies following each event.
X30 Super Master Division Created for SKUSA ProKart Challenge and LAKC
Friday, 05 January 2018 11:44

In just one week, the 2018 season will begin for the Superkarts! USA organization as the inaugural SKUSA Winter Series kicks off at the AMR Homestead-Miami Motorplex in southern Florida. It is the earliest start to the season for the organization in almost 20 years, which continues to expand its national and regional schedule in an effort to reach all four corners of the United States. The California ProKart Challenge – SKUSA’s flagship regional program – is also slated to begin in less than 30 days, opening its six-race championship chase at Buttonwillow on February 2-3. New for the California PKC in 2018, and also for the SKUSA-affiliate Los Angeles Karting Championship, will be the X30 Super Master division.
Revised Number Plate Dimensions
Written by John Motley - National Tech Director   
Saturday, 30 December 2017 15:23

Due to the difficulty of using the CIK specification numbers on Cadet bodywork we are modifying the requirement in Rulebook Section to "at least 5" tall with a .750" stroke". The competition number shall be bordered by a yellow background of .375 minimum. No other modifications to the specification is allowed. 
2018 Membership and Kart Number Changes
Sunday, 26 November 2017 11:45
With growth comes a few challenges and difficult choices. SuperKarts! USA hasn’t been a stranger to either of these things during the past few seasons. After several lengthy discussions, we’ve decided on the following changes to better serve our growing customer base and expanding promotional efforts.

Calendar-Year Memberships
Starting in 2018, all SKUSA memberships will be good for the calendar year only. This means January 1st through December 31st instead of an expiration date 12 months after purchase. In order to simplify this transition, we will do the following.
  • If your current expiration date is between Jan 1 and June 30, 2018, your 2018 Membership Renewal will only be $50.
  • If your current expiration date is between July 1 and December 31, 2018, your 2018 Membership Renewal will be free.
In order to take advantage of this offer, you MUST submit an online renewal during the renewal periods described below.
  • The transitional renewal period for members will be December 1st through January 31th.
  • The transitional late renewal period will be February 1st through February 15th. Late renewals will cost $125.
  • Renewals after February 15th will be treated as new memberships.
  • New memberships will be $150.
The standard renewal rate for 2019 Memberships will then be $100, and the standard renewal period will then be December 1st through Jan 15th and the standard late renewal period will be January 16th through January 31st.

CIK Kart Numbers
Starting in 2018, SKUSA will be standardizing to CIK number specifications. This means solid yellow number panels and solid black numbers for all classes, 1 digit for champions, and 2 and 3 digits depending on your class. No more letter designators. Please refer to SKUSA Rule 20.2.2 for the dimensional specifics. Our use of the video marshalling system is the main catalyst for this change, but we’d be remiss if we didn’t point out the difficulty of our track officials reading some of our color combinations and your custom number panels.

IAME Classes Shifter Classes
Micro Swift - 10-99
Mini Swift - 100-299 (200-299 reserved for overflow)
X30 Junior - 700-799
X30 Senior - 300-499 (400-499 reserved for overflow)
X30 Master - 500-599
S1 - 100-199
S2 - 200-299
S3 - 300-399
S4 - 400-499
S5 - 500-599
S4SM - 600-699
KZ (SuperNats) - 4-99

Reserved Numbers
I know what everyone is now thinking, and there is no easy way around it. We will no longer be reserving race numbers with your memberships. Each class will be assigned a block of numbers and when you enter your first race of any series you will pick from any available numbers in that pool. That will then be your “reserved” number for the rest of that series. Thankfully, MotorsportReg allows you to pick numbers in real time. You are likely to have a different number in the Winter Series, PKC and ProTour, so first come, first serve.

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