2014 Competition Class Requirements

SPECIAL NOTE: For the 2014 season, HPV and KPP motors may use any combination of components that are HPV or KPP.

6.1 Briggs Animal Sportsman

6.1.1 Age

7 thru 12 years old

(7 year old driver must have 12 prior BKC “events” for experience or BOD approval if at a different track)

6.1.2 Engines/Fuel/Weight

Briggs & Stratton Animal (restricted)

Gas only or Methanol Alcohol Only

240 lbs. (kart and driver)

6.1.3 Tire Spec

Bridgestone (YDS)

6.1.4 Miscellaneous

Briggs & Stratton Animal (restricted) requires a Gold 0.505 restrictor (see Rule 7.2.7). Engine per current WKA tech. Exception: no claiming of clutch.


6.2 Yamaha Sportsman (YBX)

6.2.1 Age

7 thru 10 years old

Past year champion must move out of class(see 1.7.2.4)

(7 year old driver must have 12 prior BKC “events” for experience or BOD approval if at a different track)

6.2.2 Engines/Fuel/Weight

100cc Yamaha KT100S (restricted)

Gas and Oil

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

6.2.3 Tire Spec

Bridgestone (YLC)

6.2.4 Miscellaneous

100cc Yamaha KT100S (restricted) requires a Walbro WA55B carburetor with WA55B manifold.

Must use stock/unaltered RLV-YBX Muffler or stock/unaltered RLV-YBX Muffler with welded end cap as purchased from Badger Kart Club.


6.3 Yamaha Sportsman

6.3.1 Age

8 thru 12 years old

6.3.2 Engines/Fuel/Weight

100cc Yamaha KT100S (restricted)

Gas and Oil

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

6.3.3 Tire Spec

Bridgestone (YLC)

6.3.4 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 Komet Sportsman

6.4.1 Age

8-12 years old

6.4.2 Engines/Fuel/Weight

KPP 100

Gas and Oil only

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

6.4.3 WKA Bodywork

All bodywork rules according to WKA Manufacturer’s cup specifications. Lower bumper cross member mandatory.

6.4.4 Tire Spec

Bridgestone (YLC) 10x4.5-5 Front and rear.

6.4.5 Miscellaneous

KPP 100 engine, Walbro WA55B with WA555B manifold, KPP1 or HPV1 pipe and header assembly. Tech, engine and clutch rules per current WKA Rule Book. 2009 through 2014 clutch rules allowed.


6.5 Yamaha Junior

6.5.1 Age

11 to 15 years old

6.5.2 Engines/Fuel/Weight

100cc Yamaha KT100S

Gas and Oil

305 lbs. (kart and driver)

6.5.3 Tire Spec

Bridgestone (YLC)

6.5.4 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).


6.6 Briggs Animal Junior

6.6.1 Age

11 thru 15 years old

6.6.2 Engines/Fuel/Weight

Briggs & Stratton Animal

Gas only or Methanol alcohol only

300 lbs. (kart and driver)

6.6.3 Tire Spec

Bridgestone (YDS)

6.6.4 Miscellaneous

Engine per current WKA tech.


6.7 Komet Junior

6.7.1 Age

12 - 15 years old

6.7.2 Engines/Fuel/Weight

KPP 100

Gas and Oil only

320 lbs. (kart and driver)

6.7.3 WKA Bodywork

All bodywork rules according to WKA Manufacturer’s cup specifications.

6.7.4 Tire Spec

Bridgestone (YLC) 10x4.50-5 front, 11x6.00-5 rear.

6.7.5 Miscellaneous

KPP 100 engine, Walbro WB3A carburetor, KPP2 or HPV 2 pipe and header assembly. Tech; engine rules per current WKA Rule Book; 2009 to 2013 clutch rules allowed.


6.8 Yamaha Supercan

6.8.1 Age

15 years or older

6.8.2 Engines/Fuel/Weight

100cc Yamaha KT100S

Gas and Oil

355 lbs (kart and driver)

6.8.3 Tire Spec

Bridgestone (YLC)

6.8.4 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 Senior Super Heavy

6.9.1 Age

15 years or older

6.9.2 Engines/Fuel/Weight

- 100cc Yamaha KT100S

Gas and Oil

405 lbs. (kart and driver)

- Briggs Animal Engine

Gas or methanol

405 lbs. (kart and driver)

6.9.3 Tire Spec

Bridgestone (YLC)

6.9.4 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).

Briggs Animal engine per current WKA tech. Aftermarket billet rod allowed. Must retain stock length.

Maximum kart weight of 225 lbs. (without driver)


6.10 Komet Senior

6.10.1 Age

15 years or older.

6.10.2 Engines/Fuel/Weight

KPP 100

Gas and Oil only

360 lbs. (kart and driver)

6.10.3 WKA Bodywork

All bodywork rules according to WKA Manufacturer’s cup specifications. Lower bumper cross member mandatory.

6.10.4 Tire Spec

Bridgestone (YLC) 10x4.50-5 front, 11x7.10-5 rear.

6.10.5 Miscellaneous

KPP 100 engine, Walbro WB3A carburetor, KPP2 or HPV2 pipe and header assembly. Tech: engine rules per current WKA Rule Book; 2009 to 2014 clutch rules allowed.


6.11 Briggs Senior Animal

6.11.1 Age

15 years or older

6.11.2 Engines/Fuel/Weight

Briggs & Stratton Animal

Gas only or Methanol alcohol only

350lbs. (kart and driver) using YDS tires

300lbs. (kart and driver) using YDS tires and slide restrictor: min slide height 1.418 inches. Max carb opening 0.690 inches. Locking cap (Briggs & Stratton part 555726) required. 

405lbs. (kart and driver) using YLC tires. No maximum kart weight.

6.10.3 Tire Spec

Bridgestone (YDS) or (YLC) as above 6.11.2

6.11.4 Miscellaneous

Engine per current WKA tech.


6.12 TaG Senior

6.12.1 Age

15 years or older

6.12.2 Engines/Fuel/Weight

Per WKA

6.12.3 Tire Spec

Bridgestone (YLC)


6.13 Expert

6.13.1 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.

6.13.2 Requirements

Kart must pass safety pre-tech.

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

6.13.2.1 Fuel

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


Other Rules That Should You Should Check Out

  • Bridgestone YLC Tires only, Except Briggs Animal Classes and Expert.

  • Briggs Animal Sportsman, Junior, and Senior: Bridgestone YDS Tires only.

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

  • Briggs use a Methanol pump around

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

  • 2-Cycle spec oil is 6 to 8oz Burris Blend or Burris Castor per gallon or any combination Burris Blend and Burris Castor, 6 to 8oz per gallon.

  • All KPP, Shifter, and TaG Senior classes must follow CIK Bodywork with full rear bumpers

  • 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.

  • 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: Al Weisensel 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.