2008 “250cc” General Rules

All drivers, owners, and crew persons are responsible to follow all the Safety rules, and track rules of Delta Speedway.  Any person violating those rules will be subject to suspension, and expulsion from the facilities.  This is at the sole discretion of Delta Speedway and its appointed officials.

Disclaimer: All rules may be changed/modified/adjusted as needed by the Delta Speedway Racing Committee.  Rules are designed and enforced to keep competition equal and safe.

Age: Drivers ages 10 and up may compete in the "250cc" Class.  (Subject to Referee’s Discretion) 

Roll Cage: Roll cages shall be at least 1" .062 wall thickness, or 1 1/18 "

.065 wall thickness, or 1 1/14" .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 cages 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" radius. No square or pointed corners allowed.  Roll cage must be a min.of 3" and a max.of 6" above the drivers helmet. It is mandatory to install a cross bar behind the seat to support the shoulder harness.

Bumpers And Nerfs: Cars must have a 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 of the tires or wheels, which ever is the widest.  No sharp corners or design as to hook or damage. All cars must be equipped with nerf bars. Nerf bars must extend to inside edge of tires, but not beyond the outside of the tire.   All cars must be equipped with a rear bumper.  Nothing on the vehicle may protrude beyond the rear bumper of the car.  All bumpers and nerf bars must be bolted to the chassis, no pop rivets are allowed.  Any vehicle losing a nerf bar or bumper may be black flagged at the referee’s discretion, if the referee feels the vehicle is unsafe to continue racing.

Safety: Seat belts must be securely attached to the car and used at all times.  Metal to metal latches only, 5-point seat belts, shoulder harness, and sub strap are required. Belt dates must not be over 3 years old. (Example: Oct.03 may be used in 2004,2005,and 2006) Arm restraints are mandatory and must be adequately adjusted to keep the drivers hands below the top of the roll cage. Helmets must be full head coverage competition type and one of the three latest

SNELL Auto approvals.  No MC rated helmets allowed.  All drivers will wear a name brand flame-retardant full one-piece Nomex uniform, rated 3-2A/5 or better. Single layer, and Karting suits are not allowed.  Neck braces are mandatory; cage nets, or headrest are required.  SFI gloves are mandatory for safety.  Delta Speedway suggest each driver wears Nomex underwear, and hood sock.  Also each car should be equipped with a halon type fire extinguisher system.

Electrics and Electronics:  On/off switches must be mounted 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.

Battery:  All wet cell batteries mounted in the cockpit must be covered and vented outside the cockpit area.

Fuel: 250cc Single Class cars may run gasoline, ethanol, or methanol.  No nitro additives will be allowed.

Weight: 250cc Class car, minimum car and driver weight 615 lbs.  Drivers are encouraged to weigh before the racing activities begin.  All cars must meet weight requirement using scales provided by Delta Speedway.  Cars must go directly to scales as directed by racing officials.  Any driver that fails to go directly to the scales will be automatically disqualified.

Suspension: Tread. Max.52 inches center to center. Min.32 inches, center to center of tires.  Wheelbase. Max. 70 inches, Min. 50 inches, center of front axle to center of rear axle.

Steering: A solid or tubular tie rod must connect front wheels. Rear wheel drive only. All steering bolts and suspension bolts, (except wheel nuts), must be secured by some type of locking device. 

Shocks: All shock absorbers are legal.  Shocks must be bolted to chassis, front axle and rear suspension. 

Brakes: Brakes will be of sufficient strength so as to slide the wheels while the car is in motion at any given time.  All brakes will be hydraulic, not mechanical in nature.

Tires & Wheels:  Tires may not exceed 22 1/2 " in height.  Left rear tire; minimum circumference 56”.  Wheels must be held on with 4 or more standard lug nuts or knock-off hubs.  All cars using front wheel centers must have an aerospace nut or other safety nut securely in place.

Right Rear Tire:  The 250cc class will not have a right rear tire rule in 2008.

Bodies: All cars must have complete bodies.  Tail sections must be in place for all races. There must be a metal firewall between driver and engine, made of 24-gauge steel or .0625" aluminum. Body of cars must be made of aluminum, metal, fiberglass, or high impact plastic. No part of the body, or any other material is allowed to protrude, beyond the rear down rail of the chassis.  All cars must be painted an attractive color or colors. No rear view mirrors. 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 aluminum or fiberglass, and can be no higher than 11" from the top of cage, and 24 inches from the front cowl.  Mud guards may not extend to the upper top frame rail (above the drivers head).  All mechanically operated devices must be mounted below the driver’s shoulders for safety.

Transmission: Any type transmission is legal. Any car equipped with a shifting mechanism must have this device mounted in the driver’s compartment. All cars must be chain driven.

Wings: The wing cannot be mounted outside the centerline of the tires.  All top wings must have 1/16" radius edges or edging. No raw edges. No wood except for ribs or spars inside the center section. Wings sides cannot be more than 6” below top of roll cage. Nose wings cannot exceed 24" X 18", and must carry car number. Top wings are mandatory to enter the night’s event. Cars may finish without a wing if no replacement is available.

Numbers: All cars must have legible numbers painted in contrasting colors on both sides of car and the nose. Min. height is 8" on nose & nose wing, 10" on each side of tail, and 12" on the wing.  Numbers must be separated from advertising so they will be readable.  If a number is unreadable by the scorekeeper the driver must alter the number so it is readable.  If the number is not altered, the car will not be scored. There will be no duplicate numbers in a class. Drivers from the previous year can maintain their number. If duplicate numbers already exist in a class, priority will be based on time of registration. 

License: All drivers, when signing in for any Delta Speedway Racing event, must show their current membership card.  Only Delta Speedway Racing members earn points, and are eligible for the yearlong awards. If a card is not presented at the time of sign-in, the driver or pit member will pay the non-member fee.

Ballast: Any material used for ballast must be firmly attached as a part of the car's structure. No liquid or loose ballast such as water, fuel, oil, sand bags, rocks, log chains etc. will be allowed.

Engine Rules:  Only 250cc 2-stroke single cylinder engines are allowed.  The maximum allowable displacement for this class is 270cc. 

Rookie Rule:  Any driver signing in, who has not been previously been given approval to run as a “non-rookie”, may be asked to run as a rookie.  If a driver is running as a rookie, that driver will display, from the rear of the car, a white rookie flag.  The driver must start at the rear of each race they compete in, (except the trophy dash).  After the referee feels the driver has demonstrated the proper skills, the rookie flag may be removed.  This rule is to insure the safety of all participants and spectators at Delta Speedway.

General Rules:  Pleas read the general competition rules.  All drivers and crew are responsible for knowing and following these rules.