Sugar River Raceway 2021 Competition Classes
Check out our competition classes. Many kart, driver, engine, and experience level combinations to get you involved in this great sport.
Kid Kart Class
Kid Kart Classes, Ages 5 through 7. Any tire sized 10-4.5×5. 150# kart and driver combined weight at the end of the race.
Comer C-51 Engine, 10-89 gear ratio. Max tire pressure 30 PSI. Max circumference 32 5/8″. Tech per NKA manual starting page 57.
Honda GXH50 Sealed Engine, Open gear ratio. Tech per NKA Manual page 65.
Briggs LO206 Sealed Engine, Open gear ratio. LO206 with carb lock, RLV pipe (#5507), .310″ Slide (#555732) 4,100 RPM Rev Limiter. Tech per Briggs Manual.
Jr. Box Stock 1 Honda
Jr. Box Stock 1
Ages 7 through 11, Hoosier R80 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 SRR Honda manual
Jr. Box Stock 2 Honda
Jr. Box Stock 2
Ages 12 through 15, Hoosier R80 tires, 4.5 front and 6.0 rear tires
Red Restrictor @ 225#’s
Green Restrictor @ 275#’s
Unrestricted @ 305#’s
Milled GX200 Head @ 325#’s
Tech per SRR Honda manual.
Sr. Box Stock Honda
Sr. Box Stock Honda
16 and older, Hoosier R80 tires, 4.5 fronts and 6.0 rear tires
Red Restrictor @ 300#’s
Green Restrictor @ 340#’s
Unrestricted @ 370#’s
Milled GX200 Head @390#’s
Tech per SRR Honda manual.
Jr. Super Stock Honda
Jr. Super Stock
Ages 9 through 15, Hoosier R80 tires, 4.5 front and 6.0 rear tires
Red Restrictor @ 260#’s
Green Restrictor @ 300#’s
Unrestricted @ 330#’s
Tech per SRR Honda manual.
Sr. Super Stock Honda
Sr. Super Stock
Ages 16+ (12+ with a year of race experience). Hoosier R80 tires, 4.5 front, and 6.0 or 7.1 rear tires.
Red Restrictor @300#’s
Green Restrictor @ 340#’s
Unrestricted @ 370#’s
Milled GX200 Head @390#’s
Tech per SRR Honda manual.
Honda Masters
Honda Masters
Two divisions; 35> and 50>, Hoosier R80 tires, 4.5 front and 6.0 or 7.1 rear tires.
Red Restrictor @320#’s
Green Restrictor @ 360#’s
Unrestricted @ 390#’s
Milled GX200 Head @410#’s
Tech per SRR Honda manual. In 2017 Masters will run the same engine tech as the Super Stock class. This opens up air intake, headers and flywheels
Briggs Animal LO206 Junior 1 Club
Jr. 1 Club
8 through 12 years, Hoosier R60B tires, 4.5″ front and rear. Green Slide #555740 w/lock, RLV #5506 or 5507 header & silencer, 260#s’.
Tech is per Briggs Manual.
Briggs LO206 Animal National Junior
Junior
12 through 15 years, Hoosier R60B tires, 4.5 front & 6.0 rear tires, Yellow Slide #555741 w/lock, RLV #5506 or 5507 header & silencer, 310#s’.
Engine tech per Briggs Manual.
Briggs LO206 Animal Senior Heavy
Senior
15+ on age, Hoosier R60B tires, 4.5 front & 6.0 rear tires, unrestricted, RLV #5506 or 5507 header and silencer, 390#’s.
Engine tech per Briggs Manual.
Briggs LO206 Animal Senior Medium
Senior
15+ on age, Hoosier R60B tires, 4.5 front & 6.0 rear tires, unrestricted, RLV #5506 or 5507 header and silencer, 360#’s.
Engine tech per Briggs Manual.
Ignite Karting Series
Ignite Karting Series Class Link
Sugar River Raceway will begin running the Ignite Series by Margay in 2021. We will start with the Senior Medium class. Chassis and series rules can be viewed on the Ignite Karting link above. Use this Engine Tech Link for the Briggs Engine Tech that corresponds the the series.
The Ignite Series at Brodhead will run a 15T clutch driver only.
Yamaha Jr. Sportsman
Jr. Sportsman
8-12 years, Open tire rule using four 4.5″ tires, RLV SSX-V #7548 can muffler, Walbro WA55B carb, 245#’s. Per NKA tech starting page 49.
All bodywork must be CIK-style in appearance and must meet WKA Manufacturer’s Cup specifications. Front nose must be equipped with a CIK-homologated pushback nose system with a maximum of two CIK-homologated clamps.
Yamaha Junior
Junior
12-15 years, Open tire rule using 4.5 front & 6.0 rear tires, RLV SSX-V #7548 can muffler, Walbro WB3A carb, 320#’s. Per NKA tech starting page 49.
All bodywork must be CIK-style in appearance and must meet WKA Manufacturer’s Cup specifications. Front nose must be equipped with a CIK-homologated pushback nose system with a maximum of two CIK-homologated clamps.
Yamaha Senior Supercan
Senior Supercan
15+ on age, Open tire rule using 4.5 front & 7.1 rear tires. Gas and oil fuel. 355# minimum kart & driver weight. . Per NKA tech starting page 49.
100cc Stock Yamaha KT100S. Walbro WB3A carb. Must use RLV-SSX stock box muffler only. RLV-SSX box muffler must be original unaltered part #7548 (the can with four outlet holes spaced 90 degrees to each other) or part #7543 (the can with the four outlet holes evenly spaced between the 12 and 3 o’clock positions) or Part #7540 (4 holes, holes up).
All bodywork must be CIK-style in appearance and must meet WKA Manufacturer’s Cup specifications. Front nose must be equipped with a CIK-homologated pushback nose system with a maximum of two CIK-homologated clamps.
Miscellanious
Are you a karter from another area thinking about trying out Sugar River Raceway? Bring us three (3) entries and you can make the class that is not on our class listing. Be it KA100 or some version of TAG.