Kid Kart Classes,
Ages 5 through 7. Any tire sized 10-4.5x5. 150# kart and driver combined weight at the end of the race.

Comer C-50, C-51or C-52 Engine,10-89 gear ratio. Max tire pressure 30 PSI. Max circumference 32 5/8". Engine must remain stock appearing. Kids 5 years of age must run a restrictor on Outlaw engine.

Honda GXH50 Sealed Engine, Open gear ratio. Tech per NKA Manual.

Briggs LO206 Sealed Engine, 17/57 gear ratio. LO206 with carb lock, RLV pipe (#5507), .310" Slide (#555732) 4,100 RPM Rev Limiter. Tech per Briggs Manual.

No Cadet Chassis Allowed! 


Jr Box Stock Honda Class,
Ages 7 through 11,
MG Orange Tires 4.5 and 6.0 rears, or 4.5's all the way around.
Black Restrictor @ 225#’s
Gold Restrictor @ 275#’s
Unrestricted @ 320#’s
(Tech per Sugar River Raceway Honda Manual)


Super Stock Legends Honda Class,
Ages 40+ (SRR will consider lower age depending on experience and competitiveness),
MG Orange Tires (4.5 front and 6.0 rear).
Red Restrictor @320#’s
Green Restrictor @ 360#’s
Unrestricted @ 390#’s
Milled GX200 Head @410#’s
(Tech per Sugar River Raceway Honda Manual)


Cadet Lo206,
Ages 8 Through 10 years, Cadet Chassis only, MG Orange Tires (4.5 front and rear). Red Slide #555733 w/lock, RLV #5506 or 5507 header & silencer, 245#s'.
(Engine Tech Per Briggs Manual)


Sportsman Lo206,
Ages 10 through 12 years, Cadet or Adult Chassis, MG Orange Tires (4.5" front and 6.0 rear). Green Slide #555740 w/lock, RLV #5506 or 5507 header & silencer, 275#s’. Open Bodywork.
(Engine Tech is per Briggs Manual)


Junior Lo206,
Ages 12 through 15 years, MG Orange Tires (4.5 front & 6.0 rear), Yellow Slide #555741 w/lock, RLV #5506 or 5507 header & silencer, 320#s’. Open Bodywork.
(Engine tech per Briggs Manual)


Senior 340# Lite Lo206,
Ages 15+ on age, MG Orange Tires (4.5 front & 6.0 rear), Standard Black Slide, RLV #5506 or 5507 header and silencer. Open Bodywork.
(Engine tech per Briggs Manual)


Senior 375# Heavy Lo206,
Ages15+ on age, MG Orange Tires (4.5 front & 6.0 rear), Standard Black Slide, RLV #5506 or 5507 header and silencer. Open Bodywork.
(Engine tech per Briggs Manual)