CLASS STRUCTURE
CLASS STRUCTURES
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Thompson Kart Raceway is a member track of the NKA. Racing operations are regulated by the NKA Tech Manual unless otherwise noted.
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In the interests of our Club's membership, CKRA class structures deviate from the associated class structures listed in the NKA Tech Manual.
- If any particular exception or deviation is not specifically indicated below, then follow NKA regulations.
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It is the responsibility of the driver/crew chief to know and understand the rules.
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NKA updates their regulations as necessary throughout the year and can be viewed on the NKA website.
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CKRA also reserves the right to update regulations as necessary and will post updates on the CKRA website.
CADET 2-CYCLE
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ages 8 to 12
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IAME Micro Swift
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Weight: 250#
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Micro ROK
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Weight: 255#
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Yamaha is welcome to run (235#), but parity will not be possible.
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CKRA reserves the right to make adjustments to class specs in the interest of maintaining parity.
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Spec Tire: MG RED SH or SH2
KID KARTS
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ages 5 to 7
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Participation class per NKA rules to allow children to learn to race in a friendly, fun environment.
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No season points. Participation awards to each Kid Kart driver.
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Gearing: Chain
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Comer - #219, 10 tooth front sprocket, 89 tooth rear sprocket
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206 - #35 chain, 17 tooth front sprocket, 57 tooth rear sprocket
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Tire size 10 x 450 or 460 x 5 with maximum rear tire circumference 33.75"
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Weight:
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Option One: Minimum 150 lbs. - for Kart with Comer 50/51cc
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Option Two: Minimum 170 lbs - for Kart with Briggs 206​
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CADET BRIGGS 206
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ages 8 to 12
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Engine: Briggs Racing 206
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Exhaust: RLV pipe (#5506, #5507)
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Weight
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Option One - Minimum 255 lbs. - must use Red slide (#555733) in Carburetor with carb lock
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Option Two - Minimum 295 lbs. - must use Green slide (#555740) in Carburetor with carb lock
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Maximum kart only weight (without driver) for Green slide is 205 lbs.
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Spec Tire:
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MOJO D2
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MG RED SH or SH2
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Hoosier R60B
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Vega Red
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NKA bodywork rules
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CKRA reserves the right to make adjustments to class specs in the interest of maintaining equality.
JUNIOR 2-CYCLE
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ages 11 to 15
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IAME KA100
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Weight 320
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22mm IAME Exhaust Restrictor
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Spec Tire: MG RED SH or SH2
JUNIOR BRIGGS 206
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ages 11 to 15
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Engine: Briggs Racing 206
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Exhaust: RLV pipe (#5506, #5507)
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Weight
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Option One - Minimum 300 lbs. - must use Blue slide (#555734) in Carburetor with carb lock
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Option Two - Minimum 320 lbs. - must use Yellow slide (#555741) in Carburetor with carb lock​
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​
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Spec Tire:
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MOJO D2
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MG RED SH or SH2
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Hoosier R60B
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Vega Red
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NKA bodywork rules
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CKRA reserves the right to make adjustments to class specs in the interest of maintaining equality.
SENIOR 2-CYCLE
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ages 15 and up
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Option One
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IAME KA100​
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Weight - 370 lbs.
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Option Two​
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Yamaha KT100S​
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Weight - 345 lbs.
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Exhaust - SR-Y Pipe
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Clutch is mandatory
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Spec Tire: MG RED SH or SH2
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NKA bodywork rules - CIK
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CKRA reserves the right to make adjustments to class specs in the interest of maintaining equality.
SPEC FUEL
2-cycle classes:
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100% Gasoline/Oil Mix
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0% alchohol content.
All 206 Classes:
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Sunoco 93 purchased at:
Hambden Redi Go
13940 GAR Highway
Chardon, OH... about 9 miles west of the track.
SENIOR BRIGGS 206
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ages 15 and up
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Engine: Briggs Racing 206
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Exhaust: RLV pipe (#5506, #5507)
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Weight
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Option One - Minimum 360 lbs. - must use Green coil
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Spec Tire:
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MOJO D2
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MG RED SH or SH2
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Hoosier R60B
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Vega Red
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NKA bodywork rules - Gold Cup or CIK
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CKRA reserves the right to make adjustments to class specs in the interest of maintaining equality.
MASTERS BRIGGS 206
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ages: 35+
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Engine: Briggs Racing 206
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Exhaust: RLV pipe (#5506, #5507)
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Weight: 385lbs​
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Spec Tire:
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MOJO D2
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MG RED SH or SH2
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Hoosier R60B
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Vega Red
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NKA bodywork rules - Gold Cup or CIK
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CKRA reserves the right to make adjustments to class specs in the interest of maintaining equality.
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Drivers 18 years and older who are over 200lbs. can request an age waiver.
NOVICE GROUP(S)​
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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.
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The group can be comprised of 2-Cycle and 206 drivers of the same age group.
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Finishing position will be as if they finished at the tail end of the appropriate class.
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For example, if there were 6 entries in the Cadet 2-cycle class, the highest finishing Cadet 2-cycle in the Novice Group would receive 7th place points for the day, and so on with any other Cadet 2-cycle. The same practice would apply to the Cadet Briggs 206 in that Novice Group.
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This concept can be applied to any class if the number of entries warrant its use.