CLASS STRUCTURE

CLASS STRUCTURES

  • Thompson Kart Raceway is a member track of the WKA.  Racing operations are regulated by the WKA Tech Manual unless otherwise noted.

  • In the interests of our Club's membership, CKRA class structures deviate from the associated class structures listed in the WKA Tech Manual.

  • If any particular exception or deviation is not specifically indicated below, then follow WKA regulations.

  • It is the responsibility of the driver/crew chief to know and understand the rules. 

  • WKA updates their regulations as necessary throughout the year and can be viewed on the WKA website.

  • CKRA also reserves the right to update regulations as necessary and will post updates on the CKRA website.

2-CYCLE JUNIOR SPORTSMAN

  • ages 8 to 12

  • Option One:

    • Engine: Yamaha KT100S - only heads with OEM casting "Yamaha" and cylinders with Y3, Y4 or 787 are legal

    • Exhaust: 4-hole can (RLV, SSX-V)

    • Carburetor: Walbro WA55B

    • Weight: Minimum 235 lbs.

  • Option Two:

    • IAME Micro Swift (details to be determined through pending testing in the spring)

    • Weight: TBD

  • Clutch is mandatory

  • Spec Tire: OPEN

  • CKRA reserves the right to make adjustments to class specs in the interest of maintaining equality.

2-CYCLE JUNIOR

  • ages 11 to 15

  • Option One

    • Yamaha KT100S - only heads with OEM casting "Yamaha" and cylinders with Y3, Y4 or 787 are legal

    • Weight - Minimum 305 lbs.

    • Exhaust: 4-hole can (RLV, SSX-V)

    • Carburetor: Walbro WB3A

  • Option Two (pending spring testing)

    • IAME KA100

    • Weight - TBD

    • Exhaust Restrictor - TBD

  • Clutch is mandatory, NO axle clutches

  • Spec Tire: OPEN​​

  • CKRA reserves the right to make adjustments to class specs in the interest of maintaining equality.

KID KARTS

  • ages 5 to 7

  • Participation class per WKA rules to allow children to learn to race in a friendly, fun environment.

  • No season points. Participation awards to each Kid Kart driver.

  • Gearing: Chain #219, 10 tooth front sprocket, 89 tooth rear sprocket

  • Tire size 10 x 450 or 460 x 5 with maximum rear tire circumference 34"

  • Weight:

    • Option One: Minimum 150 lbs. - for Kart with Comer 50/51cc

    • Option Two: Minimum 170 lbs - for Kart with Briggs 206​

BRIGGS 206 JUNIOR SPORTSMAN

  • ages 8 to 12

  • Engine: Briggs Racing 206

  • Exhaust: RLV pipe (#5506, #5507)

  • Weight

    • Option One - Minimum 265 lbs. - must use Red slide (#555733) in Carburetor with carb lock

    • Option Two - Minimum 305 lbs. - must use Green slide (#555740) in Carburetor with carb lock

      • Maximum kart only weight (without driver) for Green slide is 205 lbs.

  • Spec Tire: OPEN​​

  • WKA bodywork rules - Gold Cup or CIK

  • CKRA reserves the right to make adjustments to class specs in the interest of maintaining equality.

BRIGGS 206 JUNIOR

  • ages 11 to 15

  • Engine: Briggs Racing 206

  • Exhaust: RLV pipe (#5506, #5507)

  • Weight

    • Option One - Minimum 300 lbs. - must use Blue slide (#555734) in Carburetor with carb lock

    • Option Two - Minimum 325 lbs. - must use Yellow slide (#555741) in Carburetor with carb lock

      • Maximum kart only weight (without driver) for Yellow slide is 195 lbs.

  • Spec Tire: OPEN​​

  • WKA bodywork rules - Gold Cup or CIK

  • CKRA reserves the right to make adjustments to class specs in the interest of maintaining equality.

2-CYCLE SENIOR

  • ages 15 and up

  • Option One

    • IAME KA100​

    • Weight - 400 lbs.

    • Exhaust Restrictor - 1" (Rocketech Motorsports)

  • Option Two​

    • Yamaha KT100S​

    • Weight - 345 lbs.

    • Exhaust - SR-Y Pipe

  • Clutch is mandatory

  • Spec Tire: OPEN

  • WKA bodywork rules - CIK

  • CKRA reserves the right to make adjustments to class specs in the interest of maintaining equality.

NOVICE GROUP(S)​

  • This group will be run on an as-needed basis to provide a place for new participants to learn to race without the hazard of running with seasoned veterans.

  • The group can be comprised of 2-Cycle and 206 drivers of the same age group.

  • Finishing position will be as if they finished at the tail end of the appropriate class.

    • For example, if there were 6 entries in the 2-cycle Jr. Sportsman class, the highest finishing 2-cycle Jr. Sportsman in the Novice Group would receive 7th place points for the day, and so on with any other 2-cycle Jr. Sportsman. The same practice would apply to the 206 Jr. Sportsman in that Novice Group.

  • This concept can be applied to any class if the number of entries warrant its use.

BRIGGS 206 SENIOR

  • ages 15 and up

  • Engine: Briggs Racing 206

  • Exhaust: RLV pipe (#5506, #5507)

  • Weight

    • Option One - Minimum 345 lbs. - must use Green coil

    • Option Two - Minimum 385 lbs. - can use optional Blue coil from Briggs Racing

      • Maximum kart only weight (without driver) for Blue coil is 200 lbs.

  • Spec Tire: OPEN​​

  • WKA bodywork rules - Gold Cup or CIK

  • CKRA reserves the right to make adjustments to class specs in the interest of maintaining equality.