

8233 Sidley Road - Thompson, Ohio 44086
Give us a call at 440-289-5291

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.
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 - #219, 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 34"
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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 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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Open Tire
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 305 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: OPEN
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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: OPEN
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: OPEN
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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.
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.
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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Spec Tire: OPEN
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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 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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Option Two - Minimum 385 lbs. - can use optional Blue coil from Briggs Racing
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Maximum kart only weight (without driver) for Blue coil is 200 lbs.
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Spec Tire: OPEN
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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.