Junior Sportsman - Age 8 to 12, Chassis minimum wheelbase 35”, Tires 10 x 4.50 x 5 front and rear (See approved tire manufacturers), Gas and Oil, Engines - Yamaha or Comer, Yamaha KT w/WA55b or HPV1 carburetor with WA55B manifold, RLV SSX-V # 7548, Comer K80 with stock exhaust (no Pipe), Engine clutch only. Airbox required on both engines, see ENGINE/AIRBOX, Weight 230 lbs Comer, 250 lbs Yamaha and Briggs. IKS has the right to revise and amend this class. This class will allow a four cycle engine to compete (see 4 Cycle Junior Sportsman (4)). IKS has the right to revise and amend this class. Yamaha Junior Super-Can - Age 12 to 15, Chassis minimum wheelbase 40”, Tires 10 x 4.50 x 5 fronts 11 x 6.00 x 5 rears (See approved tire manufacturers), Gas and Oil, Yamaha KT, RLV SSX-V # 7548, Engine clutch only. Airbox required, see ENGINE/AIRBOX, Weight 305 lbs, IKS has the right to revise and amend this class. Yamaha Senior Sportsman - Medium - Age 15 and Older, (See approved tires manufacturers) 10 x 4.50 x 5 fronts, 11 x 7.10 x 5 rears, Gas and Oil, Yamaha KT, RLV SSX-V # 7548, Engine clutch only, Airbox required, see ENGINE/AIRBOX, Weight 340 lbs, This class will share track time with the Yamaha Master class. It will be scored separately. Only one transponder will be issued to a driver in this combined class. IKS has the right to revise and amend this class. Yamaha Senior Sportsman - Heavy - Age 15 and Older, (See approved tire manufacturers) 10 x 4.50 x 5 fronts, 11 x 7.10 x 5 rears, Gas and Oil, Yamaha KT, RLV SSX-V # 7548, Engine clutch only, Airbox required, see ENGINE/AIRBOX, Weight 370 lbs, IKS has the right to revise and amend this class. Yamaha - Masters - Age 35 and Older, (See approved tire manufacturers) 10 x 4.50 x 5 fronts, 11 x 7.10 x 5 rears, Gas and Oil, Yamaha KT, RLV SSX-V # 7548, Engine clutch only, Airbox required, see ENGINE/AIRBOX, Weight 360 lbs, This class will share track time with the Yamaha Senior Sportsman Medium class, it will be scored separately. Only one transponder will be issued to a driver in this combined class. IKS has the right to revise and amend this class. Shifter - Age 15 and Older, (See approved tire manufacturers) 10 x 4.50 x 5 fronts, 11 x 7.10 x 5 rears, Gas and Oil, All reed valve, water cooled gear box engines are allowed, Maximum 125cc, Airbox required, see ENGINE/AIRBOX, Weight - ICC 385 lbs, under 100cc 330 lbs with front brakes, 320 lbs without. IKS has the right to revise and amend this class. TaG Senior Lite - Age 15 and Older, (See approved tire manufacturers) 10 x 4.50 x 5 fronts, 11 x 7.10 x 5 rears, Gas and Oil, Air box required, see ENGINE/AIRBOX,  Weights and Engines, see ENGINE/TaG, IKS has the right to revise and amend this class. WKA TaG Senior Heavy - Age 15 and Older, (See approved tire manufacturers) 10 x 4.50 x 5 fronts, 11 x 7.10 x 5 rears, Gas and Oil, Air box required, see AIRBOX,  Weights and Engines, see ENGINE/TaG, IKS has the right to revise and amend this class. WKA TaG Junior - Age 12 to 15, (See approved tire manufacturers) 10 x 4.50 x 5 fronts, 11 x 7.10 x 5 rears, Gas and Oil, Airbox required, see ENGINE/AIRBOX, Weights and Engines, see ENGINE/TaG. IKS has the right to revise and amend this class. Class may run with the TaG Senior. WKA Yamaha / HPV Pipe - Age 15 and Older, (See approved tire ,manufacturers) 10 x 4.50 x 5 fronts, 11 x 7.10 x 5 rears, Gas and Oil, Engines Yamaha KT - HPV w/number 3 pipe w/ 12" minimum and 12.5" maximum flex length, and , Airbox required, see AIRBOX, Weight 360 lbs, IKS has the right to revise and amend this class. Local Option - Age 15 and Older, Open fuel, Air box optional, Weights for 2 cycles-- 100cc & opens 320lbs, 125cc & opens 340lbs, 135cc & opens 360lbs, 150cc & opens 380lbs, Over 150cc 400lbs. Weights for 4 cycles-- all 4 cycle single cylinder engines 350lbs. Class will run if three (3) or more racers have signed up. IKS can and will provide for a local option class within this structure, if all agree to compete as a separate race within the class running, prior to qualifying and approved by the race director. In addition to traditional body work, all CIK body work is also approved. IKS had the right to revise and amend this class.