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'The Brodhead Historics'
2015 Class Listings

1 Historic 1956 to 1964 Historic Karts and Engines. Dry clutch: Single, Twin, Triple engines: 16.5 (270cc) max displacement: No expansion chambers: Mufflers recommended: Vintage tires. Demonstration class only. Promoter may split class per VKA guidelines.
2 Junior/Woman Sidewinder or Rear Engine Rear or sidewinder karts; Recommended single 80cc American fan cooled engine. Allowed up to 100cc (McCulloch, Power Products, West Bend, Homelite, Clinton). Women up to 100cc or 135cc West Bend industrial engine. All engines must run single HL 1" or smaller throttle bore or small McCulloch flat back carburetor. Aftermarket small intake manifold allowed. Dry clutch, box muffler and vintage tires required. Promotors may allow 100c engines in a segregated format..
3 Sportsman rear Rear American Engines; 8.2 c.i. (135cc) max displacement; WB-820 with 8.2 c.i. (135cc) max displacement must be industrial type; McCullochs must be 6.1 (100cc) max displacement or saw blocks over 80cc. All engines run single HL 1" throttle bore carburetor, small single intake manifold. Small Mac flat-back carb okay. Must have dry clutch, box muffler and vintage tires. No Mc 91, 92, or 93 engines.
4 Mac 49/Saw Rear Enginer Rear engine karts, McCulloch Mc 49 engines and saw block engines cannot exceed 80 cc max. 1.375 stroke maximum. Aftermarket small intake manifold OK. Single HL 1 inch carburetor, 7/8' venturi or small mac flat back carb. Dry clutch. box muffler, vintage tires mandatory.
5 Single Rear 6.1 & under American or Foreign engines, 6.1 (100cc) max displacement; pipes allowed, oil clutches allowed, no disc clutches, vintage tires, any carb combination allowed.
6 Single Rear 8.2 American or Foreign engines, 8.2 C.I. (135cc) max displacement; pipes allowed: oil clutches allowed, no disc clutches, vintage tires, any carb combination.
7 Dual Rear American or Foreign engines 16.5 C.I. (270cc) max displacement: pipes allowed, oil clutches allowed, no disc clutches, vintage tires required. Any Historic B or C class karts may run in this class.
8 Single Sidewinder American 6.1 American Fan Cooled engines, 6.1 C.I. (100cc) max displacement; engine clutches only, pipes allowed, 1" inch axle, modern tires permitted.
9 Single Sidewinder American 8.2 American Fan Cooled engines, 8.2 (135cc) max displacement; engine clutches only, pipes allowed, 1" inch axle, modern tires permitted.
10 Single Sidewinder Foreign 6.1 Foreign or American engines 6.1 C.I. (100cc) max displacement engine produced before 1980. Engine clutches only, pipes allowed, 1" axle, modern tires permitted.
11 Single Sidewinder Foreign 8.2 Foreign or American Engines 8.2 C.I. (135cc) max displacement produced before 1980. Engine clutches only, pipes allowed, 1" axle, modern tires permitted.
12 Over 60, Rear or Sidewinder Kart Driver 60 years +. 6.1 American engines only 6.1 C.I. (100cc) max displacement engine, pipes allowed, oil clutches allowed, no disc clutches, vintage tires required. Any carb combination. Promotors should consider separating the sidewinder and rear engine karts for scoring purposes when participation is sufficient to do so. Start sidewinders on front of grid.
13 Dual Sidewinder Dual sidewinder kart w/American or foreign engines. 16.5 C.I. (270cc) max displacement. Engine clutches only, pipes allowed. 1 inch axle allowed if original, modern tires permitted (minimum tire durometer of 48. Bridgestone and MG tires allowed). Kart and engines must be manufactured before 1983.
14 80-85 Sidewinder American or Foreign engines 6.1 C.I. (100cc) max displacement; engine clutches only, pipes allowed, modern tires permitted, 1.25" axles permitted. Kart and engine manufactured prior to 1986.
15 Yamaha Piston Port Sidewinder karts manufactured before 1976 with single 100cc Yamaha piston port engine (KT100S), 1975 to present; piston port only, factory ignition system only (exception RLV TCI replacement module), Walbro WB3A carburetor only, pipe allowed, Horstman DXL, Hartman, L&T wet disc, Burco, Max Torque clutches only, (no modern clutches) third bearing support required. 1" or 1.25" axle, modern tires, gasoline only..
16 Stock Appearing or Sportsman Sidewinder Sidewinder or rear engine kart, pre 1980, with 6.1 (100cc) max displacement American Fan Cooled engine. Single carburetor (Mikuni, Tillotson, or McCulloch), any size throttle bore. Factory V-4 intake, modern tires, box muffler, dry clutch (Max Torque or Rev Grip).

Kart Manufactured between 1956 and 1986
are eligible for participation.

No open headers at Brodhead even if period correct.

Allowed in all classes
Classes 1-11 Require a 1 inch axle. Karts and Engines must be from 1956 to 1979 era.
Vintage tires 65 durometer min, refer to VKA Acceptable Vintage Tire schedule.
Modern tires 60 durometer or higher, refer to VKA Acceptable Modern Tire Schedule.
Modifications Allowed with vintage period type components
Wet Clutch Allowed in all classes except Sportsman, Historic and Mac49/saw. No axle clutches, direct drive allowed
Brake upgrades
3rd Bearing Support Required on all sidewinder class karts using an oil bath and/or a disc clutch. If no bearing Support a guard to contain the clutch should be present.
Kart Chassis To remain in their original design from their model year. Reproduction and Specials allowed but must be vintage type.

 


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