Drivers must be a minimum of 14 years old with no exceptions. Certified copy of birth certificate is required. At his sole discretion, the Race Track Promoter has the authority to permit an underage driver to participate in this class.
Roll cages shall be at least 1-inch .062 wall thickness, or 1 1/8 inch .065 wall thickness, or 1 ¼ inch .065 wall thickness. Roll cage shall be made of chromoly steel or equivalent material. The front section of the cage shall be no further back than the steering wheel. Roll cage shall have sufficient fore and aft bracing and strength to support the weight of the car and driver in case of an upset. Cage shall have gussets at the intersecting bars to the uprights. Bends must have at least 3-inch radius. No square or pointed corners allowed. Roll cage must be a minimum of 3 inches above the driver’s helmet. It is mandatory to install a cross brace behind the seat to support the shoulder harness.
Cars must have bumper extending beyond the front and rear tires. Nothing may extend beyond a tangent line from the outside edge of the tires to the bumpers. Nothing may extend beyond the outside edge or the tires or wheels, whichever is the widest. No sharp corners or designs as to hook or damage. All cars must be equipped with nerfing bars. Nerfing bars must extend to inside edge of tires, but not beyond the outside of tire.
On and off switches must be on dash, top of the cowl or on steering wheel. On/off switch must be connected and functional. No radio communication is allowed with the car or the driver.
All wet cell batteries mounted in the cockpit must be covered and vented outside the cockpit area.
All A Class cars must run Nationally approved fuels. Spec upper end lube is Sunoco Alky Racing Fuel additive – 7.5 ounces or Klotz Uplon KL107.
4 cylinder 600cc powered cars; minimum car and driver weight is 750 lbs.
Tread; Maximum 50 inches. Minimum 32 inches, center to center of tires. Wheelbase: Maximum 70 inches. Minimum 50 inches, center of front axle to center of rear axle. Steering; Front wheels must be connected by a solid or tubular tie rod. Rear wheel drive only. All suspension bolts except wheel nuts must be secured by some type of locking device.
Any shock absorber legal, except no cockpit adjustable shocks.
BRAKES
Brakes will be of sufficient strength so as to slide the wheels while the car is in motion at any given time.
TIRES AND WHEELS
Any wheel size and tire combination may be used, but tires may not exceed 22 ½ inches in height. Wheels must be held on with 4 or more standard lug nuts or knock-off hubs. Right rear tire must be a minimum 50-durometer compound Hoosier or American Racer tire. Siping and grooving are allowed. Tire durometer check should be done at least 15 minutes after the races to allow for cool down. Air bleaders are allowed.
Any material used for ballast must be firmly attached as a part of the car’s structure AND such added weight must be painted white AND must have the car's number on it. No liquid or loose ballast such as water, fuel, oil, sandbags, rocks, logs, chains etc. allowed.
Motors must have transmission with all stock gears in working order. Any car equipped with a shifting mechanism must have this device mounted in the driver’s compartment. Chain guards will be made of .090-inch thick aluminum or equivalent and will run on top of chain from the front of the front sprocket to the center of the rear axle. Driver must not be able to touch the chain or sprockets while sitting in the cockpit.
All cars must have complete bodies. Tail sections must be in place for time trials and all races. There must be a metal firewall between driver and engine, made of 24-gauge steel or .0625” aluminum. Body of car must be made of aluminum, metal, fiberglass or high impact plastic. All cars must be an attractive color or colors. No rear view mirrors allowed. The only part of the car allowed to be dismantled for driver to enter or exit is a quick release steering wheel hub. Mudguards must be made of aluminum or fiberglass, and can be no less than 16 inches from the top of the cage. No mechanical, electrical or hydraulic adjustments will be allowed in the cockpit area. All fuel tanks must be equipped with a one-way check valve designed to prevent spillage of fuel in the event of a rollover.
All cars must have legible numbers in colors contrasting to the background on both sides of the car and on the nose. Minimum height of numbers on the nose is 8 inches. Minimum height on the tail is 10 inches. Minimum height on both sides of top wing is 12 inches. Cars must have a 12-inch number on top of the wing facing the front of the car. Numbers should be separated from advertising so that they will stand out and can be readable by the scorers. Numbers are limited to 3 digits and letters are not permitted.
Right side board, maximum 48” x 18”. Left sideboard, 48” x 24”. The wing cannot be mounted outside the centerline of the tires. Sideboards may not extend more than 3” beyond center section and sides must cover center section. All wings must have a 1/16” radius edges or edging. No raw edges. Wings sides cannot be more than 4” below top of roll cage. Nose wings cannot exceed 9” x 21”, and must carry car number. Top wing is mandatory to enter a night’s event. Cars may finish without a wing if no replacement is available. Cars must run a 10 square-foot fixed wing positioned no further back than the back of the roll cage. The measurement for the wing placement will be taken from the back edge of the center section of the wing, not the sideboards. That point is to be no further back than the rear of the roll cage behind the driver’s head. Roll cage cannot be altered to change this point. No cockpit adjustable wings allowed. No split or multi-staged nose or top wings allowed. Wing center section has to be one piece.
Mufflers are mandatory and must keep the car at 95 decibels or less. All mufflers must be packed, and checked routinely to ensure full packing is in place. No super trapps allowed.
4 cylinder 600 cc stock engines. Stock engines as the motor was run on the motorcycle from the factory with the charging unit. No engine work (no ported heads, no lightened canks, no cam degreeing, no lightened pistons, no head cleanup). Stock pistons only. Any air cleaner will be allowed. Any exhaust will be allowed. Rods, pistons, cams, etc. must be stock parts as used on the motorcycle the motor came from. Carburetors must be the same make and model as the motor. Factory injection allowed on gasoline powered cars only. Stock Power Commander is allowed on injection but no external adjustments will be allowed. Carbs may have metering rods, jets and springs changed to tune the fuel curve to match the car requirements. Allow only 1 OEM black box with manufacturer’s part number to be used on that make. Any type of box that has an external adjustment is considered illegal. Boxes allowed include STOCK black box style Honda “HRC” version or “Yamaha Racing” versions. No aftermarket CDI’s (ignition black boxes) allowed. Aftermarket timing advancers are illegal. Cam gears that are redrilled, slotted or altered are illegal. Internal charging systems components must remain in the motor. Any sprocket (520 or 530) will be allowed. 2003, 2004, 2005 and 2006 methanol powered engines are allowed on carburetion only. Stock or billet boots are allowed. EXCEPTION: NO KAWASAKI 636 AND no 2006 YZFR6V(C) and/or black bottom motors allowed. No 2006 Black R6 Yamahas or 2007 RR Honda. No current year production motors allowed.
SAFETY RULES
NOTE: Cars, parts, components, and/or equipment will not be considered as having been approved by reason of having passed through inspection at any time or any number of times unobserved or undetected.
Unless these specs say you can do something, you cannot.