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
Length: 52-inch maximum.
Width: 42-inch maximum.
Wheelbase: 29 inches to 31 inches
Tires: MG HZ or HZi (Red) with maximum circumference of 33-3/8 inches. Maximum tire pressure of 30 PSI after race.
Minimum weight: 150 lbs.
Only OEM bodywork 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
Past year 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 VK (Orange) 10x4.60-5 front and rear.
6.2.4 Miscellaneous
Briggs & Stratton 206 (restricted) requires unaltered “Red” .440-inch slide (P/N 555733) and 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 VK (Orange) 10x4.60-5 front and rear.
6.2.4 Miscellaneous
Briggs & Stratton 206 (restricted) requires unaltered “Green” .490-inch slide (P/N 555740) and locking cap. Engine tech per the Briggs & Stratton 206 United States Rule Set. Drum clutch required.
6.3 Yamaha Cadet
6.3.1 Age
7 through 12 years old
6.3.2 Engines/Fuel/Weight
100cc Yamaha KT100S (restricted)
Gas and Oil
250 lbs. (kart and driver) Standard and 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 HZ or HZi (Red) 10x4.60-5 front and rear
6.3.5 Miscellaneous
100cc Yamaha KT100S (restricted) requires a Walbro WA55B carburetor with
WA55B manifold.
Must use RLV-SSX stock box muffler only. SSX box muffler must be original unaltered RLV-SSX part #7548
(the can with four outlet holes spaced 90 degrees to each other) or part #7543
(the can with the four outlet holes evenly spaced between the 12 and 3 o’clock
positions) or part #7540 (4 holes, holes up).
6.4 Micro Swift
6.4.1 Age
7 through 10 years old
Past year champion must move out of class (see 1.7.2.4)
6.4.2 Engines/Fuel/Weight
IAME Micro Swift
Gas and Oil only
225 lbs. (kart and driver) Standard and Cadet Kart
6.4.3 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.
6.4.4 Tire Spec
MG HZ or HZi (Red) 10x4.60-5 Front and rear.
6.4.5 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. 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 HZ or HZi (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
310 lbs. (kart and driver)
6.6.3 Tire Spec
MG VK (Orange) 10x4.60-5 front 11x6.00-5 rear
6.6.4 Miscellaneous
Briggs & Stratton 206 (restricted) requires unaltered “Yellow” .570-inch slide (P/N 555741) and locking cap. Engine tech per the Briggs & Stratton 206 United States Rule Set. Drum clutch required.
6.7 Briggs Animal Junior
6.7.1 Age
12 through 15 years old
6.7.2 Engines/Fuel/Weight
Briggs & Stratton Animal
Gas only or Methanol alcohol only
300 lbs. (kart and driver)
6.7.3 Tire Spec
MG VK (Orange) 10x4.60-5 front 11x6.00-5 rear
6.7.4 Miscellaneous
Engine per current WKA tech.
6.8 Yamaha Junior
6.8.1 Age
12 through 15 years old
6.8.2 Engines/Fuel/Weight
100cc Yamaha KT100S
Gas and Oil
310 lbs. (kart and driver)
6.8.3 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.
6.8.4 Tire Spec
MG HZ or HZi (Red) 10x4.60-5 front 11x7.10-5 rear
6.8.5 Miscellaneous
100cc Stock Yamaha KT100S. Must use RLV-SSX stock box muffler only. SSX box muffler
must be original unaltered RLV-SSX part #7548 (the can with four outlet holes
spaced 90 degrees to each other) or part #7543 (the can with the four outlet
holes evenly spaced between the 12 and 3 o’clock positions) or part #7540 (4
holes, holes up).
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. 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 HZ or HZi 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 manufacturer. Junior restrictor as supplied by manufacturer.
6.10 TaG Junior
6.10.1 Age
12 - 15 years old
6.10.2 Engines/Fuel/Weight
IAME Leaopard with 25mm header
IAME X30 with 29mm header
IAME MY09 with 25mm header
Vortek Junior Rok
Rotax 125 Junior MAX
PRD Fireball with 0.877" filter cup (Junior II spec)
Gas and Oil only
320 lbs. (kart and driver)
6.10.3 Tire Spec
MG FZ (Yellow) 10x4.60-5 front 11x7.10-5 rear
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 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 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.
6.13 Briggs Animal Senior
6.13.1 Age
15 years or older
6.13.2 Engines/Fuel/Weight
Briggs & Stratton Animal
Gas only or Methanol alcohol only
350lbs. (kart and driver)
6.13.3 Tire Spec
MG VK (Orange) 10x4.60-5 front 11x6.00-5 rear
6.13.4 Miscellaneous
Engine per current WKA tech.
6.14 Yamaha Supercan
6.14.1 Age
15 years or older
6.14.2 Engines/Fuel/Weight
100cc Yamaha KT100S
Gas and Oil
355 lbs (kart and driver)
6.14.3 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.
6.14.4 Tire Spec
MG HZ or HZi (Red) 10x4.60-5 front 11x7.10-5 rear
6.14.5 Miscellaneous
100cc Stock Yamaha KT100S. Must use RLV-SSX stock box muffler only. SSX box muffler
must be original unaltered RLV-SSX part #7548 (the can with four outlet holes
spaced 90 degrees to each other) or part #7543 (the can with the four outlet
holes evenly spaced between the 12 and 3 o’clock positions) or Part #7540 (4
holes, holes up).
6.15 IAME 100 Senior
6.15.1 Age
15 years or older
6.15.2 Engines/Fuel/Weight
KA100
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 HZ or HZi 10x4.60-5 front, 11x7.10-5 rear.
6.15.5 Miscellaneous
KA100 engine, Tillotson HW-33A carburetor, factory airbox required. Exhaust as supplied by manufacturer.
6.16 TaG Senior
6.16.1 Age
15 years or older
6.16.2 Engines/Fuel/Weight
Cheetah SQ 125 at 350 lbs.
Easykart IAME & BMB at 350 lbs.
Motori Seven at 380 lbs.
Parilla Leopard at 365 lbs.
Parilla X-30 at 370 lbs.
Rotax FR 125 at 365 lbs.
Sonik TT 125 (125cc) at 395 lbs.
Sonik VX 125 (118cc) at 365 lbs.
Vortek Rok TT at 385 lbs.
PRD Fireball at 350 lbs.
All weights kart and driver
Engine and fuel tech per WKA
Rotax will follow BKC 2-cycle fuel rule (Rule 7.3.4.1)
Engine tech per 2014 WKA specifications
6.16.3 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.
6.16.4 Tire Spec
MG FZ (Yellow) 10x4.50-5 front 11x7.10-5 rear
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 Should You Should Check Out
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Tire treating is prohibited in all classes.
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MG HZ or HZi (Red) Tires Only Except TaG Junior/Senior, Briggs Animal and 206 Classes, and Expert.
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Briggs Animal Junior and Senior; and 206 Cadet, Sportsman, Junior, and Senior: MG VK (Orange) only.
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TaG Junior and Senior: MG FZ (Yellow) only.
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Expert: any tire meeting IKF or WKA tire qualifications.
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Briggs 206 classes use a spec gas; BP regular gasoline available at the Bull Frog Gas Station located at 319 N. Main St., Dousman, WI.
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2-Cycle classes use a spec gas; BP premium gasoline available at the Bull Frog Gas Station located at 319 N. Main St., Dousman, WI.
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2-Cycle spec oil is 6 to 8oz Redline Racing Oil, Burris Blend, or Burris Castor per gallon or any combination Burris Blend and Burris Castor or Redline and Burris Caston, 6 to 8oz per gallon.
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All classes require full rear bumpers
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All the specs listed in the class requirements on this site, are not all the rules. They are the main ones for our class structure.
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WKA rules apply, unless specified in our 'Class Requirements' on this site and the Badger Kart Club's 'Competition Rules, Regulations and Procedures' Book.
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For more information on rules e-mail: George Sieracki BKC Rules Chairman.
Questions on Requirements, Set up, Gears, etc...
Don't hesitate, just ask and they will get your questions answered. Simply contact one of the Club's Officers for help.