Sugar River Raceway 2019 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
1. Kid Kart
Comer C-51 Engine
10-89 gear ratio, any tire size marked 10-4.5×5, max tire pressure 30 PSI. Max circumference 32 5/8″. 150#’s kart and driver minimum weight, ages 5 through 7. Tech per NKA manual starting page 57.
Honda GXH50 sealed engine
Open gear ratio, any tire size 10-4.5×5, 150#’s kart and driver minimum weight, ages 5 through 7. Tech per NKA Manual page 65.
Jr. Box Stock 1 Honda
Jr. Box Stock 1
Ages 7 through 11, Bridgestone YDS tires 4.5 or 6.0.
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, Bridgestone YDS 4.5 and 6.0 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, Bridgestone YDS 4.5 and 6.0 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, Bridgestone YDS 4.5 and 6.0 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). YDS 4.5 with 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>, YDS 4.5 with 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, Bridgestone YDS 4.5. 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, Bridgestone YDS 4.5 & 6.0 tires, Yellow Slide #555741 w/lock, RLV #5506 or 5507 header & silencer, 310#s’.
Engine tech per Briggs Manual.
Briggs LO206 Animal Senior
Senior
15+ on age, Bridgestone YDS 4.5 & 6.0 tires, unrestricted, RLV #5506 or 5507 header and silencer, 390#’s.
Engine tech per Briggs Manual.
Yamaha Jr. Sportsman
Jr. Sportsman
8-12 years, Bridgestone YLC 4.5 tires, RLV SSX-V #7548 can muffler, Walbro WA55B carb, 245#’s. Per NKA tech starting page 49.
Yamaha Junior
Junior
12-15 years, Bridgestone YLC 4.5 & 6.0 tires, RLV SSX-V #7548 can muffler, Walbro WB3A carb, 320#’s. Per NKA tech starting page 49.
Yamaha Senior Pipe
Senior Pipe
15+ on age, Bridgestone YLC 4.5 & 7.1 tires, RLV SR-Y pipe w/#9110 header and 1.75″ insert. 9.5″ minimum piston to end of insert, Walbro WB3A carb, 345#’s. Per NKA tech starting page 49.
Komet Piston Port, KPP/HPV/KPV
Komet Piston Port
Senior class, drivers 15+, 360#’s, Any HPV or KPP combinations per WKA spec. Bridgestone YLC 4.5 & 7.1 tires. Engine tech by NKA manual starting page 54.
TAG Class
TAG Class
15+ ages, per current NKA specs on engines and weights per WKA.