Ages:
Kid Kart – Ages 5 to 8** – (per NKA rule 10.3.14: Age Waivers are not allowed for moving out of kid kart)
Cadet 1&2 – Ages 7 to 12**
Cadet Novice 206 – Ages 7 to 12**
Junior 206 – Ages 7 to 12**
Micro MAX – Ages 8 to 12
Mini MAX – Ages 10 to 14
Junior 2 206 – Ages 12 to 15
Senior 206 – Ages 16 and up**
Heavy 206 – Ages 16 and up**
KA100 Junior – Ages 12 to 16
Junior MAX – Ages 12 to 15
KA100 Senior – Ages 16 and up
KA100 Master – Ages 35 and up
Senior and Club MAX – Ages 16 and up
Masters MAX – Ages 32 and up
—Please note that all Rotax MAX Challenge age categories are based on competition age, which is defined as the age a driver attains (or turns) during the calendar year of the racing season. For official details, refer to the Global Rotax MAX Challenge Sporting Regulations available at www.rotax-racing.com/rmc-regulations.
In the Rotax MAX Challenge, unlike some other karting organizations, the applicable age for a category is the one you reach on your birthday within that calendar year. For example:
- If you are currently 8 but will turn 9 during the season, your competition age is 9.
- This system creates intentional overlaps between certain categories, particularly Micro MAX (typically ages 8–11) and Mini MAX (typically ages 10–13), allowing drivers in the overlapping age range (10–11) to compete in either class based on their skill level or preference. Some racers opt to run Micro MAX at club-level events and Mini MAX at regional or higher competitions to gain experience. NKA ages do not apply to these classes.
—end of rotax section
For most classes at HCKC the following applies unless an international rule attached with an engine package applies.
Prevailing NKA section 10.3 will be used, below is as of 2024 – Please note Age Waivers do not travel, they are track specific. Kid Karts are not allowed to apply for age waivers.
—–
**Must be attained age see NKA rule 10.3.14: Age Waivers
10.3.10: Advancing an Age Group
10.3.8: Competition Age A driver’s competition age is determined by the age that they will be on December 31 of that year. For example; A driver is 9, but will turn 10 in November. As their age on December 31 will be 10, that driver is considered to be 10 for that year but can take advantage of the Option Year. Exception: The absolute minimum age for on track NKA events is 5. The driver must have had their 5th birthday before being able to take to the course.
Kid Kart – Exhibition Class
Ages: Attained age 5 through age 8 – (see NKA rule 10.3.14: Age Waivers)
Engine: Honda GXH50. Cylinder liner and aluminum cylinder “as cast.” The engine is not legal if any metal has been removed to match the port opening to aluminum cylinder.
Weight: Min 150 lbs. with driver and safety gear; to be checked after qualifying and each heat.
Fuel: Gas and oil only; subject to fuel tech. Fuel will be checked using a Digitron meter which is set to -55 using cyclohexane; fuel must not exceed 0. Fuel may be teched after qualifying and each heat. Absolutely no performance-enhancing additives are allowed. Regular pump gas contains additives that may not pass tech.
Tires: Size 4.50/4.60-5
Rear tire circumference – 33¾” maximum.Maximum tire pressure shall not exceed 20 psi (hot).
Gearing: 15:89 gearing
Rules:
1. The primary purpose of the Kid Kart class is to serve as a training/educational process to teach and improve skills. This class teaches racing safety to children in the competition age range as listed above.
2. Before entering the track event each child, along with their parent or guardian, will be required to know and demonstrate a complete knowledge of the use and meaning of the flags used to control the training race.
3. Each participant will be required to present his/her kart and personal safety equipment for inspection.
4. A participant or kart will not be permitted to participate if they are not in complete compliance with all safety conditions, as outlined, and in complete compliance with local track safety procedures.
Procedure:
1. Kid Kart participants may not be mixed with any other classes for practice, training, or race.
2. NKA safety and driver protection rules to be followed. The length of the race will be determined by the number of entries and availability of time on the program. (Race director decision)
3. All participants will receive like awards.
4. There will be a Training Director appointed at each demonstration who shall be accountable to the race director and responsible for the enforcement of the spirit and intent of the training program.
CADET NOVICE 206
Ages 7 – 12 (As of 2024 – age was lowered to 7 from 8 with no competition age allowed, must be attained age see NKA rule 10.3.14: Age Waivers)
Purpose: Beginner class for those new to racing and skipped any Kid Kart racing. Karts will qualify together in Cadet 206 and be split out into novice using the Jr Bracket time rules. Non-championship class, this is used to help prepare races similar to kid kart.
Engine: Briggs and Stratton LO206 SEALED racing engine (no modifications, seals may not be tampered with or removed – must follow the current Briggs and Stratton rulebook. 6100 rev limiter – ‘Green’ Slide 0.490″ (#BS555740) – 206 w/carb lock 2026 Briggs & Straton 206 Factory Rule Set
Minimum Weight: 245 lbs. with kart, driver, and safety gear; to be checked after qualifying and each heat.
Fuel: Spec fuel is Ethanol-Free Pump Gas purchased at the QT station on Rueckle Road (first light on the right side – North Bound side) or VP MS93. All fuel is subject to tech. Fuel will be checked using a Digitron meter which is set to spec at 0 using a sample and must be within +/- 10. Fuel may be teched after qualifying and each heat. Absolutely no performance enhancing additives are allowed.
Tires: Envico Blues, you must race on the same set of tires you qualify on in all heats. If a tire becomes unusable during the event, a replacement tire can be substituted with the race director’s approval. The spec tire shall follow the prevailing SKUSA/TSRS compound.
Chassis: Cadet
CADET 206 (JUNIOR 1)
Ages 7 – 12 (As of 2024 – age was lowered to 7 from 8 with no competition age allowed, must be attained age see NKA rule 10.3.14: Age Waivers)
Engine: Briggs and Stratton LO206 SEALED racing engine (no modifications, seals may not be tampered with or removed – must follow the current Briggs and Stratton rulebook. 6100 rev limiter – ‘Green’ Slide 0.490″ (#BS555740) – 206 w/carb lock 2026 Briggs & Stratton 206 Factory Rule Set
Minimum Weight: 245 lbs. with kart, driver, and safety gear; to be checked after qualifying and each heat.
Fuel: Spec fuel is Ethanol-Free Pump Gas purchased at the QT station on Rueckle Road (first light on the right side – North Bound side) or VP MS93. All fuel is subject to tech. Fuel will be checked using a Digitron meter which is set to spec at 0 using a sample and must be within +/- 10. Fuel may be teched after qualifying and each heat. Absolutely no performance-enhancing additives are allowed.
Tires: Envico Blues, you must race on the same set of tires you qualify on in all heats. If a tire becomes unusable during the event, a replacement tire can be substituted with the race director’s approval. The spec tire shall follow the prevailing SKUSA/TSRS compound.
Chassis: Cadet
JUNIOR 206 (JUNIOR 2)
Ages 12 – 15 (Competition Age: A driver’s actual age as of Dec 31st shall establish his/her “competition age” for the competition year).
Engine: Briggs and Stratton LO206 SEALED racing engine (no modifications, seals may not be tampered with or removed – must follow the current Briggs and Stratton rulebook. 6100 rev limiter – ‘Yellow’ Slide (#555741) – 206 w/carb lock 206 Factory Ruleset v2026.1.1
Minimum Weight: 320 lbs. with kart, driver, and safety gear; to be checked after qualifying and each heat.
Fuel: Spec fuel is Ethanol-Free Pump Gas purchased at the QT station on Rueckle Road (first light on the right side – North Bound side) or VP MS93. All fuel is subject to tech. Fuel will be checked using a Digitron meter which is set to spec at 0 using a sample and must be within +/- 10. Fuel may be teched after qualifying and each heat. Absolutely no performance-enhancing additives are allowed.
Tires: Envico Blues, you must race on the same set of tires you qualify on in all heats. If a tire becomes unusable during the event, a replacement tire can be substituted with the race director’s approval. The spec tire shall follow the prevailing SKUSA/TSRS compound.
Chassis: Full-size
All Rotax classes follow the www.RaceRotax.com tech and class weight as listed in the sporting regulations. Tech Regs – Race Rotax
**Club MAX competes with the Jr MAX engine package at 375 lbs. min weight. Age 16+
Fuel: Gas and oil only; subject to fuel tech. Fuel will be checked using a Digitron meter which is set to -55 using cyclohexane; fuel must not exceed 0. Fuel may be teched after qualifying and each heat. Absolutely no performance enhancing additives allowed. Regular pump gas contains additives that may not pass tech.
Tires: Envico SK-H2 Blue, you must race on the same set of tires you qualify on in all three heats. If a tire becomes unusable during the event, a replacement tire can be substituted with the race director’s approval.
SENIOR LO206
Ages 16+
Engine: Briggs and Stratton LO206 SEALED racing engine (no modifications, seals may not be tampered with or removed – must follow the current Briggs and Stratton rulebook. 6100 rev limiter – Stock Slide (#555590) – 206 w/carb lock. 206 Factory Ruleset v2026.1.1
Minimum Weight: 360 lbs. with kart, driver, and safety gear; to be checked after qualifying and each heat.
Fuel: Spec fuel is Ethanol-Free Pump Gas purchased at the QT station on Rueckle Road (first light on the right side – North Bound side) or VP MS93. All fuel is subject to tech. Fuel will be checked using a Digitron meter which is set to spec at 0 using a sample and must be within +/- 10. Fuel may be teched after qualifying and each heat. Absolutely no performance enhancing additives are allowed.
Tires: Envico Blues, you must race on the same set of tires you qualify on in all heats. If a tire becomes unusable during the event, a replacement tire can be substituted with the race director’s approval. The spec tire shall follow the prevailing SKUSA/TSRS compound.
Chassis: Full-size
Heavy LO206
Ages 16+
Engine: Briggs and Stratton LO206 SEALED racing engine (no modifications, seals may not be tampered with or removed – must follow the current Briggs and Stratton rulebook. 6100 rev limiter – Stock Slide (#555590) – 206 w/carb lock. 206 Factory Ruleset v2026.1.1
Minimum Weight: 390 lbs. with kart, driver, and safety gear; to be checked after qualifying and each heat. Ages 16-34 who are not adding at least 30 lbs. of lead to reach 390 lbs. must add an additional 20 lbs. – bringing their weight to the penalty weight of 410 lbs.
Fuel: Spec fuel is Ethanol-Free Pump Gas purchased at the QT station on Rueckle Road (first light on the right side – North Bound side) or VP MS93. All fuel is subject to tech. Fuel will be checked using a Digitron meter which is set to spec at 0 using a sample and must be within +/- 10. Fuel may be teched after qualifying and each heat. Absolutely no performance enhancing additives are allowed.
Tires: Envico Blues, you must race on the same set of tires you qualify on in all heats. If a tire becomes unusable during the event, a replacement tire can be substituted with the race director’s approval. The spec tire shall follow the prevailing SKUSA/TSRS compound.
Chassis: Full-size
KA 100 JUNIOR
Ages 12 – 16 (Competition Age: A driver’s actual age as of Dec 31st shall establish his/her “competition age” for the competition year).
Engine: KA100 – SKUSA Rulebook
Minimum Weight: 320 lbs. with kart, driver, and safety gear; to be checked after qualifying and each heat.
Fuel: Gas and oil only; subject to fuel tech. Fuel will be checked using a Digitron meter which is set to -55 using cyclohexane; fuel must not exceed 0. Fuel may be teched after qualifying and each heat. Absolutely no performance enhancing additives allowed. Regular pump gas contains additives that may not pass tech.
Tires: Envico Blues, you must race on the same set of tires you qualify on in all three heats. If a tire becomes unusable during the event, a replacement tire can be substituted with the race director’s approval.
Chassis: Full-size
KA100 SENIOR
Ages 16+
Engine: KA100 – SKUSA Rulebook
Minimum Weight: 360 lbs. with kart, driver, and safety gear; to be checked after qualifying and each heat.
Fuel: Gas and oil only; subject to fuel tech. Fuel will be checked using a Digitron meter which is set to -55 using cyclohexane; fuel must not exceed 0. Fuel may be teched after qualifying and each heat. Absolutely no performance enhancing additives allowed. Regular pump gas contains additives that may not pass tech.
Tires: Envico Blues, you must race on the same set of tires you qualify on in all three heats. If a tire becomes unusable during the event, a replacement tire can be substituted with the race director’s approval.
Chassis: Full-size
KA100 MASTER
Ages 35+
Engine: KA100 – SKUSA Rulebook
Minimum Weight: 390 lbs. with kart, driver, and safety gear; to be checked after qualifying and each heat.
Fuel: Gas and oil only; subject to fuel tech. Fuel will be checked using a Digitron meter which is set to -55 using cyclohexane; fuel must not exceed 0. Fuel may be teched after qualifying and each heat. Absolutely no performance enhancing additives allowed. Regular pump gas contains additives that may not pass tech.
Tires: Envico Blues, you must race on the same set of tires you qualify on in all three heats. If a tire becomes unusable during the event, a replacement tire can be substituted with the race director’s approval.
Chassis: Full-size
CADET I
Ages 7 – 12 (As of 2024 – age was lowered to 7 from 8 with no competition age allowed, must be attained age see NKA rule 10.3.14: Age Waivers)
Engine: Micro-Swift 60cc IAME (16mm exhaust restrictor) SKUSA Rulebook
Minimum Weight: 225 lbs. with kart, driver, and safety gear; to be checked after qualifying and each heat.
Fuel: Gas and oil only; subject to fuel tech. Fuel will be checked using a Digitron meter which is set to -55 using cyclohexane; fuel must not exceed 0. Fuel may be teched after qualifying and each heat. Absolutely no performance enhancing additives allowed. Regular pump gas contains additives that may not pass tech.
Tires: An open tire rule will be in effect; however, you must race on the same set of tires you qualify on in all three heats. If a tire becomes unusable during the event, a replacement tire can be substituted with the race director’s approval. (This allows you to run a tire you might use at Pro-Kart/SKUSA/ROK/Rotax and not be locked into a “club tire”)
Chassis: Cadet
CADET II
Ages 7 – 12 (As of 2024 – age was lowered to 7 from 8 with no competition age allowed, must be attained age see NKA rule 10.3.14: Age Waivers)
Engine: Mini-Swift 60cc IAME (specs – https://www.superkartsusa.com/dmdocuments/enginemini- swift.pdf)
Minimum Weight: 245 lbs. with kart, driver, and safety gear; to be checked after qualifying and each heat.
Fuel: Gas and oil only; subject to fuel tech. Fuel will be checked using a Digitron meter which is set to -55 using cyclohexane; fuel must not exceed 0. Fuel may be teched after qualifying and each heat. Absolutely no performance enhancing additives allowed. Regular pump gas contains additives that may not pass tech.
Tires: An open tire rule will be in effect; however, you must race on the same set of tires you qualify on in all three heats. If a tire becomes unusable during the event, a replacement tire can be substituted with the race director’s approval. (This allows you to run a tire you might use at Pro-Kart/SKUSA/ROK/Rotax and not be locked into a “club tire”)
Chassis: Cadet