100cc CONTROLLED
Age 16 or older. Road Race Class 2 License. ENGINES: Yamaha, Piston Port, 100cc Controlled.
EXHAUST: Any WKA approved pipe. Gas and oil only.
MIN. WEIGHTS: Yamaha and Piston Port engines 360 lbs., Cont engines 390 lbs., Cont w/ IR1 pipe 370 lbs.

100cc CONTROLED SPEC
Age 16 or older. Road Race Class 2 License.
ENGINES: Yamaha, Piston Port, 100cc Controlled.
EXHAUST: 100cc Cont Spec IR1 only. Yamaha & PP - any approved WKA fixed pipe and 1.75” header. Gas and oil only.
MIN. WEIGHTS: Yamaha and Piston Port engines 360 lbs., Cont engines and ICA Reed engines 410 lbs.

100cc PIPE MEDIUM & HEAVY
Age 16 and older. Road Race Class 3 License.
ENGINE(S): Yamaha KT100 (only Yamaha heads with OEM casting “Yamaha” are legal. ARC Comer P-50 & P-51, PRD-RK-100, Parilla PV-92, Komet K-71 per secton 605, TKM BT81, PRC PP-100, DAP T-50 & HPV 100.
EXHAUST: Any fixed, approved pipe. Gas and oil ONLY.
MIN WEIGHT: (MEDIUM) Yamaha 375 lbs., PP 400 lbs., (HEAVY) Yamaha 410 lbs., PP 435 lbs.

B-STOCK
Age 18 or older. Road Race Class 1 License.
ENGINES: Yamaha; Piston Port; 100cc Controlled.
EXHAUST: Any Fixed WKA approved pipe (No adjustable pipes allowed) Gas and oil only.
MIN. WEIGHT: Yamaha & Piston Port engines 395 lbs.,100cc Controlled 465 lbs. OTHER: Karts must be dual-engine with engines of like category.

CONTROLLED LIMITED
Age 16 and older. Road Race Class 2 License.
ENGINES: Piston Port, 100cc Controlled, and 135cc Controlled, Stock Appearing.
EXHAUST: All engines including 135 controlled and piston port can run a WKA approved slippy pipe except Cont running IR1 pipe at 370.
FUEL: Gas & oil only exception, piston port - legal open fuel.
MIN. WEIGHTS: Piston Port 310 lbs.; Controlled prior 2000 340 lbs.; Controlled 2000 (ICA) and Stock Appearing 390 lbs.; Cont 2000 running IR1 pipe and 135cc engines 370 lbs.

FORMULA 100
Age 16 and older. Road Race Class 2 License.
ENGINES: Open-100cc Open engines, Controlled Ltd (see section 312.4).
EXHAUST: any WKA approved pipe.
FUEL: Open Class - Open fuel, Cont Ltd - gas and oil only.
MIN. WEIGHT: Open 410 lbs, Cont Ltd per Cont weights noted above.

FORMULA 125
Age 18 and older. Road Racing Class 1 License.
ENGINES: 125 Gearbox (laydown), B Ltd, Open & Spec 125 enduro @ B Ltd rules.
EXHAUST: 125 GB, no adjustable pipes, B Ltd & Open, any approved pipe.
FUEL: Open and B Ltd – open; 125 GB & Spec – gas & oil.
MIN. WEIGHT: B Ltd (Spec 125) 380 lbs, 125 GB 420 lbs; Open 375 lbs.

JR ENDURO LITE & HEAVY
Age 12 through 15 only, Road Race Class 3 License.
ENGINES: Yamaha only. Only heads with OEM casting "Yamaha" and cylinders with Y3 or Y4 and 787 are legal.
EXHAUST: RLV SSX-V #7548, #7548A, #7540, #7502 for lite weight and heavy weight may use SBX muffler with, .875 Restrictor and RLV 26S header with 11" to 12" piston to end of flex (RLV exhaust restrictor added to end of flex is not part of 11-12" length). When a SSX Muffler # 7540 is used, must be run with 4 holes up and part # 7502 must be run 4 holes down, If hole exists in pipe for EGT sensor, EGT sensor probe must be in place. Gas and oil only.
MIN. WEIGHT: LITE: 320 lbs. (SSX) 340 lbs. (SBX). HEAVY: 340 lbs.(SSX) 360 lbs.(SBX). MAX. KART WEIGHT: 200 lbs. at race end when using SBX.

PISTON PORT CAN LITE, MEDIUM & HEAVY
Age 15 or older. Road Race Class 3 License.
ENGINES: Yamaha (Only heads with OEM casting "Yamaha" and cylinders with Y3 or Y4 and 787 are legal), ARC Comer & PRD RK 100.
EXHAUST: RLV SSX-V #7502, 7540, 7541, 7542, 7543, 7544 and SSXV 7548. When a SSX Muffler # 7540 is used, must be run with 4 holes up and part # 7502 must be run 4 holes down. When an SSX #7543 is used, it must be run with 4 holes pointed in the upper right direction. If a hole exists in pipe for EGT sensor, EGT sensor probe must be in place. Gas and oil only.
MIN. WEIGHT: LITE 360lbs, MEDIUM 385lbs, HEAVY 410 Lbs.
OTHER: Any driver actively participating in a "Road Racing Class 1" level class cannot run in any PP Can laydown class for that season. WKA reserves the right to determine individual eligibility for this class.

YAMAHA SPORTSMAN MEDIUM & HEAVY
Age 16 or older. Road Race Class 3 License.
ENGINE: Yamaha KT100S, Only heads with OEM casting "Yamaha" and cylinders with Y3 or Y4 and 787 are legal.
EXHAUST: RLV SBX muffler and RLV 26S Header with tube protruding through flange intact, 11.0" to 12.0" of flex from piston face to end of flex. If a hole exists in pipe for EGT sensor, EGT sensor probe must be in place. Gas and oil only.
MIN WEIGHT: MEDIUM 385 lbs, HEAVY 410 lbs.

UNLIMITED FINAL 1 & 2
Age 18 or older. Road Race Class 1 License.
CONFIGURATIONS:One 250cc gearbox single cylinder, 460 lbs, 39mm carb, gas and oil. One 450cc gearbox single cylinder 4-cycle, 460 lbs., 42mm carb, gasoline. One 125cc gearbox single cylinder, 420 lbs., any carb, gas and oil. One 250cc single cylinder non-gearbox, 460 lbs., any carb, open fuel. One 150cc single cylinder 380 lbs., any carb(s), open fuel. Two 135cc single cylinder 490 lbs., any carb(s), open fuel. Two 100cc single cylinder 465 lbs., any carb(s), open fuel. Two 135cc single cylinder fan cooled (West Bend 820 and Mac 101), 420 lbs., any carb(s), open fuel. Notes – see tech manual.
OTHER: Class runs both days for one single championship.

CIK & WKA 125 SHIFTER 1 & 2
DRIVER REQ: Age 18 and older. Road Race Class 2 Shifter.
ENGINES: (1) Mass produced, single-cylinder, motorcycle engines of up to 125cc displacement, currently available production, approved by WKA: Honda CR Reed, Kawasaki KX Reed, Suzuki RM Reed, Yamaha YZ Reed, Gilera 125cc and TM Motocross will be allowed. (See section 613 for specifications). All engine specs must be unaltered OEM parts unless otherwise specified in this manual. All competitors must be prepared to produce verification documentation of proper dimensions and component data for the engine utilized for competition prior to the time of post tech inspection. (2) ICC engines with homologated pipe and 30 mm carburetor.
EXHAUST: Motorcycle engines - Any fixed WKA approved pipe (No adjustable pipes allowed) with silencer. ICC engines – stock homologated ICC pipe and silencer.
INTAKE SILENCER: ICC requires stock, homologated airbox. Motorcycle requires airbox (see 551.4.2) and/or air filter. Where specific track or ordinances requires the use of an airbox, this will be noted on entry form. Competitor is responsible to maintain compliance with any rules or ordinances regarding noise regulation.
FUEL: Gas and oil only.
MIN WEIGHT: CIK class 385 lbs., WKA class (CIK bodywork) 410 lbs. (WKA bodywork) 430 lbs. TIRES: Open Compound, 5” or 6” Diameter Rims, Rear Tires 7.00” Min. Width.
SEAT: Must use the 125 Sprint Shifter Seat rule described in Section 360.4.4.
BUMPER: All karts must use rear bumper rule 359.3.5.
OTHER: Refer to WKA Tech Manual for additional specifications.

BRIGGS ANIMAL SPRINT 335, 360 & 385
Age 15 or older. Road Race Class 3 License.
ENGINE: Briggs & Stratton Stock Animal, Silencer Mandatory. 24” max one or two piece pipe and must be inside rear bumper. Any approved aftermarket billet rod allowed.
MIN. WEIGHTS: 335 lbs., 360 lbs. & 385 lbs.

BRIGGS JR SPRINT LITE & HEAVY
Age 12 thru 15 only, Road Race Class 3 License.
ENGINE: Briggs Stock Animal w/ .360 throttle stop (see sec 708). Silencer mandatory. 24” max one or two piece pipe and must be inside rear bumper. Any approved aftermarket billet rod allowed.
MIN WEIGHT: 295 lbs. LITE, 315 lbs. HEAVY.

JR SPRINT LITE & HEAVY
Age 12 through 15 only, Road Race Class 3 License.
ENGINES: Yamaha (Only heads with OEM casting "Yamaha" and cylinders with Y3 or Y4 and 787 are legal), ARC Comer, and PRD RK100.
EXHAUST: RLV YBX #7500. If hole exists in pipe for EGT sensor, EGT sensor probe must be in place. FUEL: Spec Fuel.
MIN. WEIGHT: 295 lbs. LITE, 315 lbs. HEAVY.

PISTON PORT CAN SPRINT 340, 360 & 380
Age 15 or older. Road Race Class 3 License.
ENGINES: Yamaha (only heads with OEM casting "Yamaha" and cylinders with Y3 or Y4 and 787 are legal), ARC Comer & PRD RK 100.
EXHAUST: RLV SSX #7502, 7540, 7541, 7542, 7543, 7544 and SSXV 7548.When a SSX Muffler #7540 is used must be run with 4 holes up and #7502 must be run 4 holes down. When #7541 is used, it must be run with 4 holes pointed in the upper left direction, #7543 must be pointed in the upper right direction. If a hole exists in pipe for EGT sensor, EGT sensor probe must be in place.
FUEL: Spec Fuel.
MIN. WEIGHT: 340 lbs, 360 lbs., 380 lbs.

SPEC 125 TAG 1 & 2
Age 16 or older. Road Race Class 2 TaG license.
ENGINES: BM Jaguar, Easykart 125, Parilla Leopard, Rotax, Sonik VX125.
AIRBOX: Must use (1) airbox originally supplied w/ approved TAG engine or (2) any CIK registered airbox.
FUEL: Spec Fuel. MIN WEIGHT: 390 lbs.
TIRES: Open tires, rear tires 7” min width.
OTHER: Refer to WKA Tech Manual for additional specifications.

WKA SPRINT 1 & 2
Age 16 and older. Road Race Class 3 License.
ENGINES: Yamaha KT100S (only Yamaha heads with OEM casting "Yamaha" are legal), ARC Comer, & PRD RK100 and Piston Port.
EXHAUST: Any Fixed WKA approved pipe (No Adjustable pipes allowed)
FUEL: Spec Fuel.
MIN WEIGHT: Yamaha, ARC & PRD: 360 lb, Piston Port 380 lbs.

STOCK HONDA 1 & 2
DRIVER REQ: Age 18 and older. Road Race Class 2 Shifter.
ENGINES: Honda CR125 RX (aka 99 CR125 Kit Motor) – Stock OEM 1999 cylinder, head, iignition, etc.
TRANSMISSION: stock Honda 5-speed or Honda 6-speed transmission & clutch assembly.
INTAKE SILENCER: Air cleaner or airbox is required (see 551.4.2. Where specific track or ordinances requires the use of an airbox, this will be noted on entry form. Competitor is responsible to maintain compliance with any rules or ordinances regarding noise regulation.
MIN WEIGHT: 385 lbs.
FUEL: Spec fuel.
TIRES: Open Compound, 5” or 6” Diameter Rims, Rear Tires 7.00” Min. Width.
PIPE: Honda RLV 6800, RCE T-3, Hi-Tech 125.
INTAKE SYSTEM: Stock Keihn PWM or PWK 38mm carb.
SEAT: Must use the 125 Sprint Shifter Seat rule described in Section 360.4.4.
BUMPER: All karts must use rear bumper rule 359.3.5.
OTHER: Refer to WKA Tech Manual for additional specifications.