2024 Competition Class Requirements

7.7 Kid Kart

NOTE: Kid Karts are a non-points exhibition class.

7.7.1 Age

5 thru 8 years old

7.7.2 Kart Specifications

Front Width: 40-inch maximum (no minimum). 

Rear Width: 39-inch minimum. 42-inch maximum 

Wheelbase: 37.75 inches maximum

Tires: MG SH or SH2(Red) with a maximum circumference of 33-3/8 inches. Maximum tire pressure of 30 PSI after race.

Minimum weight: 150 lbs.

Only OEM bodywork is allowed.

7.7.3 Engines

Comer C-50 or C-51: 50cc with fixed jet carb sizes 54 to 58. Gear ratio 10/89. #219 chain.

Briggs Junior 206: per 2017 WKA Specifications. Gear ratio 17/57. #35 chain.

Honda GXH50U: As supplied by Honda Performance Development.


6.1 Briggs 206 Cadet

6.1.1 Age

7 through 10 years old

Last year's champion must move out of class (see 1.7.2.4)

6.1.2 Engines/Fuel/Weight

Briggs & Stratton 206 (restricted)

Gas only

240 lbs. (kart and driver)

6.2.3 Tire Spec

MG RL1 or VK (Orange) 10x4.60-5 front and rear.

6.2.4 Miscellaneous

Briggs & Stratton 206 (restricted) requires an unaltered "Red" .440-inch slide (P/N 555733) and a locking cap. Engine tech per the Briggs & Stratton 206 United States Rule Set. Drum clutch required.


6.2 Briggs 206 Sportsman

6.2.1 Age

8 through 12 years old

6.2.2 Engines/Fuel/Weight

Briggs & Stratton 206 (restricted)

Gas only

260 lbs. (kart and driver)

Standard & Cadet Kart

6.2.3 Tire Spec

MG L1 orVK (Orange) 10x4.60-5 front and rear.

6.2.4 Miscellaneous

Briggs & Stratton 206 (restricted) requires an unaltered "Green" .490-inch slide (P/N 555740) and a locking cap. Engine tech per the Briggs & Stratton 206 United States Rule Set. Drum clutch required.


6.3 Micro Swift 

6.3.1 Age

 7 through 10 years old 

6.3.2 Engines/Fuel/Weight IAME 

Micro Swift 225 lbs. (kart and driver) Standard & Cadet Kart 

6.3.3 Bodywork 

All bodywork must be CIK-style in appearance and must meet WKA Manufacturer’s Cup specifications. Front nose must be equipped with a CIK-homologated pushback nose system with a maximum of two CIK-homologated clamps. 

6.3.4 Tire Spec 

MG SH, SH2 (Red) 10x4.60-5 Front and rear. 

6.3.5 Miscellaneous 

Engine per current WKA tech. 


6.5 Mini Swift

6.5.1 Age

8 through 12 years old

6.5.2 Engines/Fuel/Weight

IAME Mini Swift

Gas and Oil only

250 lbs. (kart and driver) Standard and Cadet Kart

6.5.3 Bodywork

All bodywork must be CIK-style in appearance and must meet WKA Manufacturer’s Cup specifications. The front nose must be equipped with a CIK-homologated pushback nose system with a maximum of two CIK-homologated clamps.

6.5.4 Tire Spec

MG SH or SH2 (Red) 10x4.60-5 Front and rear.

6.5.5 Miscellaneous

Engine per current WKA tech.


6.6 Briggs 206 Junior

6.6.1 Age

12 through 15 years old

6.6.2 Engines/Fuel/Weight

Briggs & Stratton LO206 (restricted)

Gas only

320 lbs. (kart and driver)

6.6.3 Tire Spec

MG RL1 or VK (Orange) 10x4.60-5 front 11x6.00-5 rear

6.6.4 Miscellaneous

Briggs & Stratton 206 (restricted) requires an unaltered "Yellow" .570-inch slide (P/N 555741) and a locking cap. Engine tech per the Briggs & Stratton 206 United States Rule Set. Drum clutch required.



6.9 IAME 100 Junior

6.9.1 Age

12 through 15 years old

6.9.2 Engines/Fuel/Weight

KA100 with Junior Restrictor

Gas and Oil only

320 lbs. (kart and driver)

6.9.3 Bodywork

All bodywork must be CIK-style in appearance and must meet WKA Manufacturer’s Cup specifications. The front nose must be equipped with a CIK-homologated pushback nose system with a maximum of two CIK-homologated clamps.

6.9.4 Tire Spec

MG S or SH2 10x4.60-5 front, 11x7.10-5 rear.

6.9.5 Miscellaneous

KA100 engine, Tillotson HW-33A carburetor, factory airbox required. Exhaust as supplied by the manufacturer. Junior restrictor as supplied by the manufacturer.


6.11 Briggs 206 Senior Medium

6.11.1 Age

15 years or older

6.11.2 Engines/Fuel/Weight

Briggs & Stratton LO206

Gas only

360 lbs. (kart and driver)

6.11.3 Tire Spec

MG RL1 or VK (Orange) 10x4.60-5 front 11x6.00-5 rear

6.11.4 Miscellaneous

Engine tech as per current Briggs & Stratton 206 Senior specifications in the Briggs & Stratton 206 United States Rule Set. Drum clutch required.


6.12 Briggs 206 Senior Heavy

6.12.1 Age

15 years or older

6.12.2 Engines/Fuel/Weight

Briggs & Stratton LO206

Gas only

390 lbs. (kart and driver)

6.12.3 Tire Spec

MG RL1 or VK (Orange) 10x4.60-5 front 11x6.00-5 rear

6.12.4 Miscellaneous

Engine tech as per current Briggs & Stratton 206 Senior specifications in the Briggs & Stratton 206 United States Rule Set. Drum clutch required


6.15 TaG 100 Senior

6.15.1 Age

15 years or older

6.15.2 Engines/Fuel/Weight

KA100

Vortek ROK VLR

Gas and Oil only

360 lbs. (kart and driver)

6.15.3 Bodywork

All bodywork must be CIK-style in appearance and must meet WKA Manufacturer’s Cup specifications. Front nose must be equipped with a CIK-homologated pushback nose system with a maximum of two CIK-homologated clamps.

6.15.4 Tire Spec

MG SH or SH2 (red) 10x4.60-5 front, 11x7.10-5 rear.

6.15.5 Miscellaneous

KA100 engine, Tillotson HW-33A carburetor, factory airbox required. ROK VLR with Tillotson HW-38A carburetor. Exhaust as supplied by manufacturer.


6.17 Expert

6.17.1 Age

Any individual who is at least 8 years old may enter the Expert class. Drivers 8 – 15 years old may race this class only with the Race Committee’s approval.

Note: The intention here is to provide a place to race for any visitors to our track who’s kart or equipment do not fall into any of BKC’s class structures.

6.17.2 Requirements

Kart must pass safety pre-tech.

Kart/driver combination must satisfy the requirements of a nationally recognized kart-sanctioning body.

6.17.2.1 Fuel

Open fuel. No Dioxane. Subject to test for such.


Other Rules That You Should Check Out


  • Tire treating is prohibited in all classes.

  • MG SH SH2 (Red) Tires Only for all 2-cycle classes and kid karts.

  • MG RL1 or VK (Orange) for all 4-cycle classes.

  • Expert: any tire meeting IKF or WKA tire qualifications.

  • Briggs 206 classes use a spec gas; BP 87-octane gasoline available at the Bull Frog Gas Station located at 319 N. Main St., Dousman, WI.

  • 2-Cycle classes use a spec gas; BP 93-octane gasoline available at the Bull Frog Gas Station located at 319 N. Main St., Dousman, WI.

  • 2-Cycle spec oil is 6 to 8oz Redline Racing Oil,  Xeramic Castor Evolution 2T Kart Racing Oil, or ELF HTX-909 per gallon.

  • All classes require CIK bodywork and full rear bumpers.

  • All the specs listed in the class requirements on this site are not all of the rules. They are the main ones for our class structure.

  • WKA rules apply, unless specified in our 'Class Requirements' on this site and the Badger Kart Club's 'Competition Rules, Regulations and Procedures' Book.

  • For more information on rules e-mail: George Sieracki BKC Rules Chairman.

Questions on Requirements, Set up, Gears, etc...

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