Competition Class Req's
6.0 Competition Class Requirements
6.1 Kid Karts (Speedsters)
Current WKA rules apply in this class except for those set forth in this document.
6.1.1 Age limitation is from five to seven years of age.
6.1.2 Engine Comer C-50 Box Stock, unaltered, 1.8 HP, Fixed jet carb, Jet size
#54 through #58.
6.1.3 “Speedsters” (Kid Kart drivers) who have demonstrated racing experience over a race season or more may participate in MKA events using the stock carburetor as described in the WKA Tech Manual minus the restrictor “pill”. New or novice Kid Kart drivers must use carburetors as described in the WKA Tech Manual that does contain the restrictor “pill”. The back of their helmets should be marked with a noticeable X, designating novice status and they will start events at the rear of the grid. At such time that these drivers demonstrate adequate driving skill and request is made by parent or guardian, removal of the restrictor “Pill” may occur by order of the Race Director for MKA events.
This is a noncompetitive training class. Although it is not a Championship Series Class all participants will receive trophies and awards throughout the season and at the banquet at the end of the season.
6.2 FOUR CYCLE COMPETITION CLASS REQUIREMENTS
Current WKA rules apply, unless specified here in “Competition Class Requirement”. The Midwest Karting Association Competition Rules and Regulations supersedes WKA rules. Five or six inch diameter wheels may be used in four cycle classes and tires are open. No front braking systems are allowed. Any dry clutch allowed in all classes except World Formula which must use a Premier clutch – (no axle clutches allowed).
15 Full body work or CIK type bodywork allowed. All bodywork must be neat in appearance. Bodywork that appears loose will be a mechanical black flag. Mounting must be secure and of good workmanship. Muffler required. All 4-Cycle Motors must use the RL-VB91XL (part no. 4104) Exhaust Silencer at all times. All weight added to meet minimum kart/driver weight requirements shall be bolted to the kart. Carrying of the ballast on the driver's person is prohibited. Ballast weight in all karts must be securely bolted to the kart with a minimum of 5/16 inch Grade 5 or better through‑bolt. All ballast securing bolts must be safety wired, cotter keyed or double nutted. Weights shall be painted white and marked with the kart number. Oil catch tank mandatory. It must be secured to reduce possibility of spillage. Securing it to the rear bumper is not allowed. Stock or WKA approved aftermarket billet rods are allowed in all Animal classes.
6.2.1 Briggs Rookie Blue Restricted Flathead Engine (2007 WKA rules apply)
Age 8 thru 12 years old
Engines/Fuel/Weight
Stock Briggs & Stratton 5HP (restricted) / Methanol Alcohol only / 260 lbs
Miscellaneous
Stock Briggs & Stratton 5HP (restricted) engine requires a .500 blue restrictor.
Must be wearing a chest protector.
6.2.1.0 Briggs Rookie Blue Restricted Animal (2007 WKA rules apply)
Age 8 thru 12 years old
Engines/Fuel/Weight
Stock Briggs & Stratton Animal restricted engine /methanol alcohol only /260 lbs
Miscellaneous
Must be wearing a chest protector.
Requires a .275 top hole and .325 bottom hole restrictor.
6.2.2 Briggs Junior
Age - 12 thru 15 years old
Engines/Fuel/Weight
Stock Briggs & Stratton flathead (restricted) / Methanol Alcohol only / 300 lbs
Stock Briggs & Stratton Animal (restricted)/ Methanol Alcohol only /315 lbs
Miscellaneous
Stock Briggs Flathead (restricted) engine requires a .575 gold restrictor
Stock Briggs Animal (restricted) engine requires a .505 gold restrictor 16
6.2.3 Briggs Sportsmen Age – Must be 15 years or older
Engines/Fuel/Weight
Stock Briggs & Stratton 5HP / Methanol Alcohol only / 350 lbs
Miscellaneous
Stock Briggs & Stratton motor 5HP (non-restricted)
6.2.4 Briggs Senior Animal
Age - Must be 15 years or older
Engines/Fuel/Weight
Stock Briggs & Stratton Animal (Methanol Alcohol only) 360 lbs.
6.2.40 Briggs World Formula
Age must be 15 or older
Engines/Fuel/Weight
Briggs Stock World Formula Engine /Gasoline only/ 375 lbs
6.3 TWO CYCLE KARTS
Current WKA Two Cycle rules apply to these classes except for rules stated here.
Any brand of oil may be used to mix with gasoline.
No spec tires, but WKA tire sizes are required.
6.3.1 Yamaha Junior Sportsman
Age: 8 thru 12 years old
Engines / Fuel / Weight
100cc Yamaha KT100S/ Gasoline and Oil/ 250 lbs (Kart & Driver)
Miscellaneous
Must have chest protector.
Carburetor Walbro WA55B
Must use RLV – SSX-V #7548 box stock muffler
New style Y3 – Y4 cylinders only; Old style cylinders not permitted
No axle clutches
6.3.2 Yamaha Junior Super Can SXX
Age: 12 thru 15 years old
Engines / Fuel / Weight
100cc Yamaha KT100S/ Gasoline and Oil/ 305 lbs. (Kart & Driver)
Miscellaneous
Must use RLV – SSX-V #7548 box stock muffler
New style Y3 – Y4 cylinders only; Old style cylinders not permitted
No axle clutches
6.3.3 Yamaha Medium Can
Age: 15+ years old
Engines / Fuel / Weight
100cc Yamaha KT100S/ Gasoline and Oil/ 340 lbs (Kart & Driver)
Miscellaneous
Must use RLV – SSX-V #7548 box stock muffler
New style Y3 – Y4 cylinders only; Old style cylinders not permitted
No axle clutches
6.3.30 HPV Junior
Age: 12 to 15 years
Engines / Fuel / Weight
HPV100/ Gasoline and Oil/ 315 lbs (Kart and Driver)
Miscellaneous
WB3A carburetor required
6.3.31 Senior HPV
Age: 15+ years old
Engine / Fuel / Weight
HPV 100/ Gasoline and Oil/ 345 lbs
Miscellaneous
(WB3A Carburetor required) (HPV3 pipe required)