• NKA Rulebook

    The HCKC Rulebook and these classes are the rules. However, our rulebook does not contain everything needed. We use NKA rules for all the rest, for example, chassis safety, dimensions, helmets, please download the NKA Rulebook and grab the latest version. -- https://www.nkaonline.com/rules

  • Briggs LO206 Rules

    Click here to download the latest Briggs LO206 engine rules. HCKC uses this ruleset for post-race tech.

  • HCKC Class Structure

    ** HCKC mission statement: To foster youth participation in karting/motorsports.**

    For older legacy classes please see current HCKC rulebook. Official class rules – updated 1/15/2022 Required: A ‘Class Coordinator’ must be identified to Race Officials prior to qualifying for each SPEC class, without which the class will not run for the day. The purpose of the ‘Class Coordinator’ is to facilitate scheduling/grid lineup, arrange for weight and fuel tech DQ’s to be communicated to scoring, and to arrange for Post-Race tech without which the results for the day are invalid. The Class Coordinator for each spec class will work closely with the Race Director and families/racers. HCKC is a volunteer club, having each class help in this manner improves the communication between racers along with scoring & race director.

    All weights are listed as the minimum required with the kart, driver, and all safety gear. If you can not find weights locally or at the kart shops check out https://www.leadweightsonline.com/go-kart-weights-prices

    Hill Country Kart Club's classes range from the age of 5 and up, with varying classes that offer great racing while allowing you a comfortable experience as your skill level increases. Below is a list of the class types raced, the age range, recommended gearing, and other basic info to help you decide all that karting has to offer. From Touch-and-Go (TaG) classes, 80cc/125cc Shifter, to low-cost 4-strokes.

Kid Kart – Exhibition Class
Competition Ages: Attained age 5 through competition age 8 – (NKA 103.2.1)

Competition Age: A driver’s actual age as of Dec 31st shall establish his/her “competition age” for the competition year.

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 I

Ages 8 – 12 (Competition Age: A driver’s actual age as of Dec 31st shall establish his/her “competition age” for the competition year).

Engine: Micro-Swift 60cc IAME (16mm exhaust restrictor)

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 8 – 12 (Competition Age: A driver’s actual age as of Dec 31st shall establish his/her “competition age” for the competition year).

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

Ages 8 – 12 (Competition Age: A driver’s actual age as of Dec 31st shall establish his/her “competition age” for the competition year).
**Pending NKA Approval age will change to 7

Purpose: Beginner class for those new to racing and skipped any Kid Kart racing. Karts will qualify together in Junior 1 LO206 and be split out into novice using the Jr Bracket time rules.

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

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 1

Ages 8 – 12 (Competition Age: A driver’s actual age as of Dec 31st shall establish his/her “competition age” for the competition year).
**Pending NKA Approval age will change to 7


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

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 2 LO206

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

Minimum Weight: 310 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

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 – https://www.superkartsusa.com/dmdocuments/engine-ka100.pdf

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 – https://www.superkartsusa.com/dmdocuments/engine-ka100.pdf

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 – https://www.superkartsusa.com/dmdocuments/engine-ka100.pdf

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

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 https://www.briggsracing.com/sites/default/files/content/files/briggs-2021-206-rules_final.pdf

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 https://www.briggsracing.com/sites/default/files/content/files/briggs-2021-206-rules_final.pdf

Minimum Weight: 390 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

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