American Sprint Cup Series 2017 Class Structure

Kid Kart & Cadet

Kid Kart

Engine: Briggs LO206 or 50cc Comer
Age: 5 to 8 (must be at least 5 to compete)
Weight: LO206 200 lbs.  /  Comer 150 lbs.
Tire: Vega FH
Tire Size: Front 4.60 / Rear 4.60
Tire Rules: New tires not required.  Same set to be used in all competition events from Saturday qualifying through Sunday main event.
Misc.: Maximum rear circumference 33”. LO206 Gear Ratio: 17/57. Comer Gear Ration: 10/89.  Kid Karts do not compete in rain. Rain points awarded. Unless announced different at race event, 206 and Comer Kid Kart classes will run together, and will be scored separately.

206 Cadet

Engine: Briggs LO206 w/ Green slide
Chassis: Cadet or Standard chassis legal
Attained Age: 7 to 12
Chassis: Traditional 4-cycle nose and seat or CIK
Weight: 265 lbs.
Tire: Vega FH  (Wet: Vega W5, 4.20 front and rear)
Tire Size: Front 4.60 / Rear 4.60 or 6.00
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying.  Same set to be used in all competition events from Saturday qualifying through Sunday main event.

Pro Gas Cadet

Engine: Briggs Pro Gas Animal w/ Green slide (*UPDATED 04/07/17 FROM GREEN RESTRICTOR PLATE)
Chassis: Cadet or Standard chassis legal
Attained Age: 7 to 12
Chassis: Traditional 4-cycle nose and seat or CIK
Weight: 265 lbs.
Tire: Vega FH  (Wet: Vega W5, 4.20 front and rear)
Tire Size: Front 4.60 / Rear 4.60 or 6.00
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying. Same set to be used in all competition events from Saturday qualifying through Sunday main event.

TaG Cadet Unrestricted

Engine: IAME Mini Swift
Exhaust: Stock pipe and exhaust header
Chassis: Cadet or Standard chassis legal
Attained Age: 9 to 12
Weight: 245 lbs.
Tire: Vega FH  (Wet: Vega W5, 4.20 front and rear)
Tire Size: Front 4.60 / Rear 4.60
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying. Same set to be used in all competition events from Saturday qualifying through Sunday main event.
Misc.: Drivers meeting each class’s age requirement may run both Restricted and Unrestricted.

2-Cycle Rookie Cadet

Engines: IAME Restricted Swift (16mm header); Rotax Micro EVO; Rotax Micro Non-EVO; Yamaha KT100; Micro Rok (restricted header).
Exhaust: IAME: 16mm header; Rotax: Micro Max exhaust system; Yamaha: RLV SSX­-V #7548; ROK: restricted header;
Chassis: Cadet or Standard chassis legal
Attained Age: 7 to 10
Weights: IAME Restricted Swift: 240 lbs.; Rotax EVO: 230 lbs.; Rotax Non-EVO: 230 lbs.; Yamaha: 225 lbs.; Micro Rok: 245 lbs.
Tire: Vega FH  (Wet: Vega W5, 4.20 front and rear)
Tire Size: Front 4.60 / Rear 4.60
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying. Same set to be used in all competition events from Saturday qualifying through Sunday main event.
Misc.: Drivers meeting each class’s age requirement may run both Rookie class and Yamaha or TaG Cadet Unrestricted.

Yamaha Cadet

Engine: Yamaha KT100. Only heads with OEM casting “Yamaha” and cylinders with Y3 or Y4 and 787 are permitted.
Exhaust: RLV SSX­-V #7548
Carburetor: Walbro WA55B with WA55B manifold
Chassis: Cadet or Standard chassis legal
Attained Age: 7 to 12
Weight: 235 lbs.
Tire: Vega FH  (Wet: Vega W5, 4.20 front and rear)
Tire Size: Front 4.60 / Rear 4.60
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying. Same set to be used in all competition events from Saturday qualifying through Sunday main event.

Junior

206 Junior

Engine: Briggs LO206 w/ Yellow slide
Attained Age: 12 to 15
Chassis: Traditional 4-cycle nose and seat or CIK
Weight: 310 lbs.
Tire: Vega FH  (Wet: Vega W5, 4.20 front, 6.00 rear)
Tire Size: Front 4.60 / Rear 6.00
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying. Same set to be used in all competition events from Saturday qualifying through Sunday main event.

Pro Gas Junior

Engine: Briggs Pro Gas Animal w/ Orange restrictor plate.
Attained Age: 12 to 15
Chassis: Traditional 4-cycle nose and seat or CIK
Weight: 310 lbs.
Tire: Vega FH  (Wet: Vega W5, 4.20 front, 6.00 rear)
Tire Size: Front 4.60 / Rear 6.00
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying.  Same set to be used in all competition events from Saturday qualifying through Sunday main event.

TaG Junior

Engines: Rotax, IAME X30, Parilla Leopard or PRD Fireball.
Attained Age: 12 to 15
Weight: Rotax 320 lbs; IAME X30 31mm header 320 lbs; Parilla Leopard 28mm header 315 lbs; Parilla Leopard My’09 28mm header 315 lbs; PRD Fireball 30mm header 325 lbs.
Tire: MG Yellow (Wet: “WT”), Hoosier R60A (Wet: “WET”), Bridgestone YLM (Wet: “YLP”), Bridgestone YLC (Wet: “YLP”), Vega FH (Wet: “W5”) Vega XM (Wet: “W5”), Mojo D2 (Wet: “W2”)
Tire Size: Front 4.60 / Rear 7.10
Tire Rules: New set of tires required at each day’s practice rounds or qualifying. Tires must be same brand and compound on all four corners of kart. No mixing brands and/or compounds.

Yamaha Junior

Engine: Yamaha KT100. Only heads with OEM casting “Yamaha” and cylinders with Y3 or Y4 and 787 are permitted.
Exhaust: RLV SSX­-V #7548
Attained Age: 12 to 15
Weight: 310 lbs.
Tire: Vega FH  (Wet: Vega W5, 4.20 front, 6.00 rear)
Tire Size: Front 4.60 / Rear 6.00
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying. Same set to be used in all competition events from Saturday qualifying through Sunday main event.

Senior

206 CIK Senior Medium

Engine: Briggs LO206
Attained Age: 15 and up
Chassis: CIK bodywork and seat only.
Weight: 350 lbs.
Tire: Vega FH  (Wet: Vega W5, 4.20 front, 6.00 rear)
Tire Size: Front 4.60 / Rear 6.00
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying. Same set to be used in all competition events from Saturday qualifying through Sunday main event.

206 Senior Heavy

Engine: Briggs LO206
Attained Age: 15 and up
Chassis: Traditional 4-cycle nose and seat or CIK
Weight: 375 lbs.
Tire: Vega FH  (Wet: Vega W5, 4.20 front, 6.00 rear)
Tire Size: Front 4.60 / Rear 6.00
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying.  Same set to be used in all competition events from Saturday qualifying through Sunday main event.

Senior Animal

Engine: Briggs Pro Gas Animal or Briggs Stock Animal (methanol)
Attained Age: 15 and up
Chassis: Traditional 4-cycle nose and seat or CIK
Weight: Stock Animal: 375 lbs. / Pro Gas Animal: 365 lbs.
* Weights may be adjusted per event per Race Director discretion.
Tire: Vega FH  (Wet: Vega W5, 4.20 front, 6.00 rear)
Tire Size: Front 4.60 / Rear 7.10
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying.  Same set to be used in all competition events from Saturday qualifying through Sunday main event.

Yamaha Senior

Engine: Yamaha KT100. Only heads with OEM casting “Yamaha” and cylinders with Y3 or Y4 and 787 are permitted.
Exhaust: SR­-Y Pipe or SSX #7548 Can.
Exhaust Notes: SR­Y Pipe w/ RLV 9110 header ­ 1.750″ connector tube 9.5″ minimum from piston to end of connector tube.
Weight: Pipe 360 lbs. / Can 340 lbs.
* Weights may be adjusted per event per Race Director discretion.
Tire: Vega FH  (Wet: Vega W5, 4.20 front, 6.00 rear)
Tire Size: Front 4.60 / Rear 7.10
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying. Same set to be used in all competition events from Saturday qualifying through Sunday main event.

TaG Senior

Engines: Rotax, IAME X30, Parilla Leopard, Sonik TX or PRD Fireball.
Attained Age: 15 and up
Weight: Rotax 365 lbs; IAME X30 370 lbs; Parilla Leopard 365 lbs; Parilla Leopard MY’09 365 lbs; Sonik TX 385 lbs; PRD Fireball 355 lbs.
* Weights may be adjusted per event per Race Director discretion.
Tire: MG Yellow (Wet: “WT”), Hoosier R60A (Wet: “WET”), Bridgestone YLM (Wet: “YLP”), Bridgestone YLC (Wet: “YLP”), Vega FH (Wet: “W5”) Vega XM (Wet: “W5”), Mojo D2 (Wet: “W2”)
Tire Size: Front 4.60 / Rear 7.10
Tire Rules: New set of tires required at each day’s practice rounds or qualifying. Tires must be same brand and compound on all four corners of kart. No mixing brands and/or compounds.

Masters

206 Masters

Engine: Briggs LO206
Age: 35 and up (must be at least 35 to compete)
Chassis: Traditional 4-cycle nose and seat or CIK
Weight: 390 lbs.
Tire: Vega FH  (Wet: Vega W5, 4.20 front, 6.00 rear)
Tire Size: Front 4.60 / Rear 6.00
Tire Rules: New set of tires required at Saturday morning practice(s) OR qualifying.  Same set to be used in all competition events from Saturday qualifying through Sunday main event.

TaG Masters

Engines: Rotax, IAME X30, Parilla Leopard, Sonik TX or PRD Fireball.
Attained Age: 35 and up
Weight: Rotax 385 lbs; IAME X30 390 lbs; Parilla Leopard 385 lbs; Parilla Leopard MY’09 385 lbs; Sonik TX 405 lbs; PRD Fireball 375 lbs.
* Weights may be adjusted per event per Race Director discretion.
Tire: MG Yellow (Wet: “WT”), Hoosier R60A (Wet: “WET”), Bridgestone YLM (Wet: “YLP”), Bridgestone YLC (Wet: “YLP”), Vega FH (Wet: “W5”) Vega XM (Wet: “W5”), Mojo D2 (Wet: “W2”)
Tire Size: Front 4.60 / Rear 7.10
Tire Rules: New set of tires required at each day’s practice rounds or qualifying. Tires must be same brand and compound on all four corners of kart. No mixing brands and/or compounds.