JR. SPRINT RULES


AGE REQUIREMENT: Drivers ages 6 through 12 (A driver who turns 13 during season will be allowed to
finish the season in which they began). Birth certificate must be on file for 12 and under. At his sole discretion,
the Race Track Promoter has the authority to permit an underage driver to participate in this class.
1.Roll Cage:
Roll cages shall be at least 1-inch .083 wall thickness mild steel, or 1 inch .065 wall thickness
chromoly steel minimum. 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. 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. Cage must have gussets at the intersecting bars to the uprights.
It is mandatory to install a cross brace behind the seat to support the shoulder harness.
2.Electric & Electronics:
On and off switch must be connected and functional and must be able to be reached
by the driver when seat belts are secured. Data computers and cockpit carburetor adjusters are allowed. No
cockpit pan hard bar adjuster allowed.
3.Fuel & Oil:
Fuel must be Sunoco Purple only (110 octane or less). No additives allowed. The most
commonly used oil test is to take a sample of oil and put it in a common tablespoon. Then the oil in the spoon is
heated. Once the oil is hot, it may burn when a match or lighter is put up to it, but if the flame continues after
the match or lighter is withdrawn, it is determined to be illegal. Racers should not take chances. Racers should
only use the commercially available oil their engine builder recommends, and they need to change it often.
4.Weight:
Minimum car and driver weight is 400 lbs. Material used for weight MUST be firmly attached to the
main frame. Only lead and/or steel plate will be allowed. AND such added weight must be painted white AND
must have the car's number on it.
5.Suspension:
Torsion bar suspension is allowed. Tread; Maximum 46 inches. 32 inches, center to center of
tires...Wheelbase: Maximum 52 inches. Minimum 50 inches, center of front axle to center of rear axle. Rear
axle to be minimum of 1¼ inch diameter steel or aluminum. ALSO 600 style axle, splined only will be
allowed... Steering: Front wheels must be connected by a solid or tubular tie rod. All suspension bolts except
wheel nuts must be secured by some type of locking device.
6.Shocks:
Steel or aluminum shocks. No cockpit shock adjustments allowed.
7.Brakes:
Brakes will be of sufficient strength so as to slide the wheels while the car is in motion at any given
time.
8.Bodies:
All cars must have complete bodies of Sprint Car design only. 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
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. Mud guards must be aluminum, metal, fiberglass or
high impact plastic. There will be no tops or body encasements allowed. Minimum opening on the right side of
the car will be 14" from top of roll cage to the top of the mud guard or sissy bar and 16" minimum from front
down tube to the back. All mechanically operated devices must be mounted below the driver’s shoulders for
safety.
9.Tires & Wheels:
Wheels to be 8 inches diameter non-beadlock only. Rim stiffeners are allowed. Right rear
spec tire to be 10 x 8.5 x 8 American Racer (McCreary) SD44 or the Hoosier Jr. Sprint tire 16.0/8.5/8/8 RD20.
Wheels must be held on with 3 or more standard lug nuts or knock-off hubs. Sipping and grooving are allowed.
10.Drive:
The drive will be by engine or jackshaft mounted clutch. No axle mounted clutches allowed. Chain
guards are mandatory on all cars and will be made of .090-inch thick aluminum or equivalent material and will
extend from the front of the front sprocket to the center of the rear axle for left side engine cars.
11.Wings:
Right side board, maximum 42 x 20. Left sideboard maximum: 42 x 20. Minimum size is 5 sq. ft.
and Maximum is 6 sq. ft. The wing cannot be mounted outside the centerline of the rear tires. The measurement
will be made from outside of the sideboards with the car level. Sideboards may not extend more than 3 inches
beyond center section and sides must cover center section. All wings must have radius edge or edging. No raw
edges. Wings sides cannot be more than 4 below top of roll cage. Nose wings cannot exceed 24 x 18, and must
carry car number. Top wing is mandatory to enter a nights event. Cars may finish without a wing if no
replacement is available. No wing adjusters allowed. 2 piece wings are allowed.
12.Hubs:
Front hubs; Go kart type with 5/8 bearings and 5/16 wheel studs minimum. Rear hubs; 5 x 130 Go-
kart type or equivalent.
13.Mufflers:
Mufflers are mandatory and must keep the car at 90 decibels or less. Mufflers must be run as
manufactured by Briggs World Formula except for turning the outlet to allow fumes to escape away from the
driver and for right hand cars. The RLV Pipe # 5442SK is the pipe kit and RLV Muffler # 4100 is the only
muffler allowed, no grinding OR smoothing of the pipe or muffler is allowed. Mufflers may be ceramic coated.
Loosely mounted mufflers or lids that come loose during the race will mean disqualification.
14. All parts must be B&S factory production parts unless otherwise noted in these rules. No machining or
alteration of parts is permitted unless specifically noted in these rules. All parts are subject to comparison with a
known stock part
15. Engine Rules:
Jr Sprint Engine Rules Briggs World Formula effective 2/1/2017.
All parts must be Briggs & Stratton factory production parts unless otherwise noted in these rules. No
machining, polishing or alteration of any parts is permitted unless specifically noted in these rules
.
Jr. Sprint drivers will not be able to return to their lower class if they race 5 times in an upper class.




RESTRICTOR Specific Rules


AGE REQUIREMENT:
Drivers 10 - 16 years of age with no exceptions. At his sole discretion, the Race Track
Promoter has the authority to permit an underage driver to participate in this class.
1.Roll Cage:
Any micro sprint chassis is allowed, but it must pass any test prescribed by the safety inspectors.
The roll cage must be of a four-post design. No elliptical (oval shaped) tubing used on or as part of the main
frame structure. Roll cages shall be at least 1-inch .062 wall thickness, or 1 1/8 inch .065 wall thickness, or 1¼
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.
2.Electric & Electronics:
On and off switches must be on dash, top of the cowl or on steering wheel. On/off
switch must be connected and functional.
3.Fuel
: Methanol only. NO ADDITIVES.
4.Weight:
Minimum car and driver weight is 700 pounds at the conclusion of the race. Any material used for
the purpose of adding to the cars total weight must be firmly attached as a part of the cars structure AND such
added weight must be painted white AND must have the car's number on it. No liquid or loose ballast, i.e.,
water, fuel, oil, sandbags, rocks, etc. allowed.
5.Suspension:
Tread: Maximum 50 inches. Minimum 32 inches, center to center of tires.
6.Wheelbase:
Maximum 70 inches. Minimum 50 inches, center of front axle to center of rear axle. Rear wheel
drive only. All suspension bolts except wheel nuts must be secured by some type of locking device.
7.Tires & Wheels:
Any wheel size and tire combination may be used, but tires may not exceed 22½
inches in height. Racing rubber only. Beadlocks optional. Air bleaders are allowed. Wheels must be held on with 3 or
more standard lug nuts or knock-off hubs. Right rear tire must be a minimum 45-durometer compound Hoosier
or American Racer (McCreary) tire. Siping and grooving are allowed. Tire durometer check should be done at
least 15 minutes after the races to allow for cool down.
8.Shock:
: Any shock absorber legal, except no cockpit adjustable shocks.
9.Bodies:
: 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.
10.Transmission:
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.
11.Wings:
: Right side board, maximum 48” x 18”. Left sideboard, 48” x 24”. The wing cannot be mounted
outside the centerline of the tires. 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 wing sideboards cannot exceed 18 x 24 max 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 drivers
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. Offset sideboards are allowed. Nose
wing 18” x 24”
12.Engine Rules:
600cc 4 cylinder 4 stroke as comes on a stock production bike for public sale in the U.S.A.
No current year production engines. Except as noted, all internal and external engine parts must remain stock
with no modifications, metal removal, blueprinting. Valve seat inserts may be reworked. Valves must remain as
produced with no modifications. Valve springs may be shimmed with standard or aftermarket shims. Cylinder
head combustion chambers may be cleaned by bead blasting with valves seated in place. Intake and exhaust
ports may not be bead blasted. Cylinder head gaskets may be replaced only with original equipment
manufacturers stock parts (All 3 layers of the head gasket must be used). All other gaskets may be replaced with
Duplicate aftermarket parts. Light cleaning of gasket surfaces with steel wool, Scotch-Brite, etc. is allowed.
Transmission gears may be shimmed only for the purpose of proper engagement. Standard or aftermarket shims
may be utilized. Aftermarket cam chain tensioner allowed for safety of motor.. Modification of oil pan & pick
up allowed or aftermarket ok. Modification to thermostat cover allowed or aftermarket ok. Modifications to
water pump cover allowed or aftermarket ok. Any air box, stock appearing CDI, aftermarket washable
replacement air filter. Any 600cc OEM CV carburetors (no flat slides allowed). Restrictor plate must have hole
diameter .750 inside, outside must be tight against inside of boot, absolutely no allowance, plate must be against
carburetors. Restrictors must be flat, no cones.
1 piece Restrictor plates recommended “King Racing Only”
13.Clutch:
: Must have manual working clutch. No automatic clutch. Must be mounted inside of roll cage.
14.Tires & Wheels:
Right Rear Hoosier Racing Tire or American Racer (McCreary) tire must test with a
durometor of 45. Beadlocks recommended on all wheels.

Restrictor drivers will not be able to return to their lower class if they race 5 times in an upper class.



TURF TIRE Specific Rules


Age Requirement
: Drivers must be a minimum of 13 years old with no exceptions. At his sole discretion, the
Race Track Promoter has the authority to permit an underage driver to participate in this class.
1.Roll Cage:
Roll cages shall be at least 1-inch .062 wall thickness, or 1 1/8 inch .065 wall thickness, or 1¼
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.
2.Suspension:
Tread: Maximum 50 inches. Minimum 32 inches, center to center of tires.
3.Wheelbase:
Maximum 70 inches. Minimum 50 inches, center of front axle to center of rear axle. Rear wheel
drive only. All suspension bolts except wheel nuts must be secured by some type of locking device.
4.Electric & Electronics:
On and off switches must be on dash, top of the cowl or on steering wheel. On/off
switch must be connected and functional.
5.Ignition:
Stock ignition and coils. No slotting allowed.
6.Transmission:
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. All shift levers should be inside cockpit.
7.Weight:
Weight is 720 pounds with driver. Any material used for the purpose of adding to the cars total
weight must be firmly attached as a part of the cars structure and such added weight must be painted white AND
must have the car's number on it. No liquid or loose ballast, i.e., water, fuel oil, sandbags, rocks, etc. allowed.
8.Fuel:
Pump gasoline only. Maximum 91 octane. No racing fuel. No additives or enhancements of any kind
allowed. You cannot finish the race with more than 3 gallons of fuel or you will be disqualified.
9.Shock:
Steel or aluminum shocks only. No adjustments allowed in the cockpit.
10.Wheels & Tires:
Wheels: 8 inch or 10 inch wheels in any combination of any type allowed.
No carbon fiber
on car anywhere
. Wheel locks will be accepted. Tires: Old Style Turf tires only. Sipping and grooving are
allowed. (New Hoosier Turf Tires are considered illegal).
11.Wings:
No wings allowed.
12.Bodies:
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.
13.Engine:
F4I engines on carburetion only are legal this season. Any stock 2005 or older 600 cc motorcycle
engine allowed. Also the F 4s and YZF's are allowed. (NO 6R, R6's, RR’s or GSXR’s allowed) Stock engines as the motor was run on the motorcycle from the factory. No engine work. Stock pistons only. Any air cleaner will be allowed because the factory air box will not fit in some chassis. Any exhaust will be allowed for the same reason. Rods, pistons, cams etc. must be stock. Carburetors must be the same make and model as the motor. No fuel injection, even if the motor comes stock from the factory with injection. Carburetors only! Aftermarket CDIs (ignition black box) will not be allowed. Aftermarket timing advancers are illegal. Cam gears that are re-drilled, slotted or altered are illegal. Charging systems must remain in the motor. Any sprocket (520 or 530) will
be allowed. Boring 1 over allowed on F1 Hondas only. This rule is locked in through 2017.


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.



A-Class Specific Rules


Age Requirement:
Drivers must be a minimum of 14 years old with no exceptions. At his sole discretion, the
Race Track Promoter has the authority to permit an underage driver to participate in this class.
1.Roll Cage:
Roll cages shall be at least 1-inch .062 wall thickness, or 1 1/8 inch .065 wall thickness, or 1¼
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.
2.Electric & Electronics:
On and off switches must be on dash, top of the cowl or on steering wheel. On/off
switch must be connected and functional.
3.Fuel:
Class "A" 600cc powered cars may run methanol or gasoline. NO UPPER END LUBRICANTS OR
ADDITIVES.
4.Weight: 4 cylinder 600cc powered cars; minimum car and driver weight is 750 lbs.
5.Suspension:
Tread: Maximum 50 inches. Minimum 32 inches, center to center of tires. No cockpit adjustable
shocks or hardware.
6.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.
7.Shock:
Any shock absorber legal except no cockpit adjustable shocks.
8.Tires & Wheels:
Any wheel size and tire combination may be used, but tires may not exceed 22½inches in
height. Wheels must be held on with 3 or more standard lug nuts or knock-off hubs. Right rear tire must be a
minimum 45 durometer compound or harder Hoosier or American Racer (McCreary) tire. Beadlocks
recommended on all wheels. Siping and grooving are allowed. Air bleaders are allowed. Tire durometer check
should be done at least 15 minutes after the races to allow for cool down.
9.Transmission:
: 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 thecenter of the rear axle.
10.Bodies:
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.
11.Wings:
Right side board, maximum 48” x 18”. Left sideboard, 48” x 24”. The wing cannot be mounted
outside of the tires. All wings must have a 1/16 radius edges or edging. No raw edges. Wings side board cannot
be more than 4” below top of roll cage. 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 drivers head. Roll cage cannot be altered to change this point. No cockpit adjustable wings, or the
hardware is allowed. No split or multi-staged nose or top wings allowed. Wing center section has to be one
piece. Offset sideboards are allowed. Nose wing 18” x 24”
12.Engine Rules:
600cc 4 cylinder 4 stroke as comes on a stock production bike for public sale in the U.S.A.
No current year production engines. Except as noted, all internal and external engine parts must remain stock
with no modifications, metal removal, blueprinting. Valve seat inserts may be reworked. Valve springs may be
shimmed with standard or aftermarket shims. Cylinder head combustion chambers may be cleaned by bead
blasting with valves seated in place. Intake and exhaust ports may not be bead blasted. All other gaskets may be
replaced with duplicate aftermarket parts. Light cleaning of gasket surfaces with steel wool, Scotch-Brite, etc. is
allowed. Stock fuel injection OEM to OEM (which means, no mismatching throttle bodies, must be the way the engine
came from the factory.) You can change fuel nozzles to accommodate methanol.
13. Transmission gears may be shimmed only for the purpose of proper engagement. Standard or aftermarket
shims may be utilized. Aftermarket cam chain tensioner allowed for safety of motor. Fuel injection engines may
run carburetors. No timing modules allowed. Modification of oil pan & pick up allowed or aftermarket ok.
Modification to thermostat cover allowed or aftermarket ok. Modification to water pump cover allowed or
aftermarket ok. Any air box, stock appearing CDI, aftermarket washable replacement air filter, power
commander on fuel injection models only.

General
1.Except as noted, all internal and external engine parts must remain stock with no modifications, metal
removal, blueprinting.
2.Valve seat inserts may be reworked. Valve springs may be shimmed with standard or aftermarket shims.
3.Cylinder head gaskets may be replaced only with original equipment manufacturers stock parts (All 3
layers of the head gasket must be used). All other gaskets may be replaced with duplicate aftermarket
parts.
4.Light cleaning of gasket surfaces with steel wool, Scotch-Brite, etc. is allowed.
5.Transmission gears may be shimmed only for the purpose of proper engagement. Standard or
aftermarket shims may be utilized.
6.Aftermarket cam chain tensioner allowed for safety of motor.
7.Fuel injection engines may run carburetors. Fuel Injected Motors may run methanol. No timing modules
allowed Modification of oil pan & pick up allowed or aftermarket ok.
8.Modification to thermostat cover allowed or aftermarket ok.
9.Modification to water pump Cover allowed or aftermarket ok.
10.Any air box, stock appearing CDI, aftermarket washable replacement air filter.
11.Power commander on fuel injection models only.
12.Any 600cc OEM CV carburetors (no flat slides allowed).
13.No hollow, tubular or drilled out bolt allowed.
14.The right side opening of body must be a minimum of 10 inches vertical at any point.



NON-WING Specific Rules


AGE REQUIREMENT:
Drivers must be a minimum of 14 years old with no exceptions. At his sole
discretion, the Race Track Promoter has the authority to permit an underage driver to participate in this class.
1.Roll Cage:
Any micro sprint chassis is allowed, but it must pass any test prescribed by the safety inspectors.
The roll cage must be of a four-post design. No elliptical (oval shaped) tubing used on or as part of the main
frame structure. Roll cages shall be at least 1-inch .062 wall thickness, or 1 1/8 inch .065 wall thickness, or 1¼
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.
2.Electric & Electronics:
On and off switches must be on dash, top of the cowl or on steering wheel. On/off
switch must be connected and functional.
3.Fuel:
600cc powered cars may run methanol or gasoline. NO UPPER END LUBRICANTS OR ADDITIVES
ALLOWED.
4.Weight:
4 cylinder 600cc powered cars; minimum car and driver weight is 750 lbs. at the conclusion of the
race. Loss of any bolt-on weight during competition will disqualify the individual from that event.
5.Suspension Tread:
Maximum 50 inches. Minimum 32 inches, center to center of tires.
6.WHEELBASE:
Maximum 70 inches. Minimum 50 inches, center of front axle to center of rear axle. Rear
wheel drive only. All suspension bolts except wheel nuts must be secured by some type of locking device.
Inside adjustables must be bolted.
7.Shock:
Any shock absorber legal, except no cockpit adjustable shocks.
8.Tires & Wheels:
Any wheel size and tire combination may be used, but tires may not exceed 22½ inches in
height. Wheels must be held on with 3 or more standard lug nuts or knock-off hubs. Right rear tire must be a
minimum 45 durometer compound or harder Hoosier or American Racer (McCreary) tire. Beadlocks
recommended on all wheels. Siping and grooving are allowed. Air bleaders are allowed. Tire durometer check
should be done at least 15 minutes after the races to allow for cool down.
9.Bodies:
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.
10.Transmission:
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.
11.ENGINE RULES:
Same as A-Class


General
1.Except as noted, all internal and external engine parts must remain stock with no modifications, metal
removal, blueprinting.
2.Valve seat inserts may be reworked. Valve springs may be shimmed with standard or aftermarket shims.
3.Cylinder head gaskets may be replaced only with original equipment manufacturers stock parts (All 3 layers
of the head gasket must be used). All other gaskets may be replaced with duplicate aftermarket parts.
4.Light cleaning of gasket surfaces with steel wool, Scotch-Brite, etc. is allowed.
5.Transmission gears may be shimmed only for the purpose of proper engagement. Standard or aftermarket
shims may be utilized.
6.Aftermarket cam chain tensioner allowed for safety of motor.
7.Fuel injection engines may run carburetors. Fuel Injected Motors may run methanol. No timing modules
allowed Modification of oil pan & pick up allowed or aftermarket ok.
8.Modification to thermostat cover allowed or aftermarket ok.
9.Modifications to water pump Cover allowed or aftermarket ok.
10.Any air box, stock appearing CDI, aftermarket washable replacement air filter.
11.Power commander on fuel injection models only.
12.Any 600cc OEM CV carburetors (no flat slides allowed).
13.No hollow, tubular or drilled out bolt allowed.
14.The right side opening of body must be a minimum of 10 inches vertical at any point.






DISQUALIFICATIONS AND SUSPENSIONS
1. Any driver or pit crew member being disqualified will be told as soon as possible after the race in which he/
she is disqualified.
2. All disqualifications, suspensions or fines for violation of the rules will be levied before race officials leave
the race site.
3. Any verbal protest to any official by a car owner or driver can result in disqualification of the car and driver
for the complete program of the date. Suspension of privilege to re-enter the pits can also be levied.
4. No violent arguments on the track or in the pits will be tolerated. For unsportsmanlike conduct and/or track
retaliation by drivers, owners, pit crew members, the following penalties will be imposed:
1ST OFFENSE - $100 FINE
2ND OFFENSE- $200 FINE
3RD OFFENSE- $500 FINE AS WELL AS POSSIBLE SUSPENSION
5. Fighting on the track or in the pits will not be tolerated and will result in a $500 fine.
6. Striking any track official is a felony and will result in suspension!
7. Fines will be deducted from pay out and must be payed completely before returning to competition.

PROTESTS FEES AND PENALTIES
I. A formal protest will be accepted in writing by the Race Director from a car owner or driver only if his/
her car was in a race with the car being protested and finished in the lead lap. A protest must be
submitted within 15 minutes after the completion of the race that is being protested. Protest money must
accompany a protest.
II. 1 member of the protesting team and 1 member of the protested car will be allowed in the tech area.
Protest Fees
--
Fuel:
$100 - Lab Fuel Check $350 both Paid in advance. All classes-no money will be returned
--
Ignition Box:
$100 - Check ignition only- no money will be returned.
--
Engine: $100
- Scope Engine, verify bore/stroke, verify crank/rods and inspect transmission.
--
Engine: $2500
- Remove cylinder head, measure bore's stroke, identify piston, verify cylinder length, check
cam timing and cams, remove pan, and verify crank/ rods and inspect transmission.
Penalties for all classes
Any engine protested and found legal, the protesting party will have their engine inspected.


SPORTSMAN

1. Age. Sportsman drivers must be 11 years of age or older. The promoter holds the right to decide if any driver is not capable of racing at a competitive level.

2. Tires. Will run a right rear tire that durometers 45 or harder on the Heart of Oklahoma Speedway's durometer. Any tire that checks softer than 45 immediately after the race will be disqualified. No cool down time. You may cut, sipe, and groove these tires.

3. Weight. 750 pounds. This weight is with the car and driver after the race. No leeway.

4. Roll Cage. Roll cages shall be at least 1 inch .062 wall thickness, or 1 1/8 inch .065 wall thickness, or 1 1/4 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 & 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.

5a. Engine Rules. 4 cycle single cylinder engines larger than 250cc, but not exceeding 600cc. Any modification allowed. 4 cycle multi cylinder engines larger than 250cc, but not exceeding 600cc. Stock engines as the motor was run on the motorcycle with the charging unit. Any valve job will be allowed as long as the valves and seats remain OEM. No engine work (no ported heads, no polishing allowed, (exception such as the Kawasaki 2008 or newer which came from the factory polished) no lightened cranks, no cam degreeing, no lightened pistons, and no head cleanup.) Stock pistons only. Any air cleaner will be allowed. Any exhaust will be allowed. Crank case ventilation to atmospheric pressure only allowed. Rods, pistons, cams etc. must be stock parts as used on the engine the way it came from the factory. Stock 600cc carburetors allowed from any make or model. No flat slide carbs. Carbs may have metering rods, jets and springs changed to tune the fuel curve to match our cars requirements. Any stock appearing black box with “out” external adjustments must be same engine make. Cam gears that are redrilled, slotted or altered are illegal. Internal charging systems components must remain in the motor. Engines must be completely stock as it came off the bike with pan modification, oil pick up modification, any air box, stock appearing CDI stock, aftermarket washable replacement air filter. Any sprocket (520 or 530) will be allowed. Only stock or after market fiber clutch disk and springs will be allowed. All metal disk and clutch basket must remain stock.

5b. Engines: You may run stock fuel injection as it came off the bike, no altering other than air box. No mismatching any year models or manufacturers. Power commanders are allowed. Auto tuners may be used, but cannot be adjusted from inside the car. No cockpit adjustments allowed for remapping any fuel injection. Must be on gasoline only. No current year production engines allowed.

6. Fuel: Racing gas or pump gas allowed, not to exceed 110 octane. 0 to negative on the Digitron fuel tester will be permitted. Anything on the positive range will be illegal. No ethanol, additives or upper end lubricants will be allowed. Any questions you may have us check it before races. 12

7. Wheel Base. Minimum wheel base is 50”. Wheel base width is a minimum of 50” measured outside tire edge. Minimum tread width – Center of tires is 32”. Maximum is 50”.

8. Wings. Right side board, maximum 48" x 18". Left side board, 48" x 24". The wing cannot be mounted outside the tires. Side boards may be offset but side boards must cover center section. Wings must be mounted parallel with cage. All wings must have 1/16" radius edges or edging. No raw edges. No wood except for ribs or spars inside center section. Top wings are mandatory to enter a night's event. Cars may finish without a wing if no replacement is available. 4 cylinder 600cc cars. Cars must run a max of 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. No cockpit adjustable wings. No split or multi-staged nose or top wings on "A" class cars. Wing center section must be one piece. No twisted or offset center sections. Side boards must be 90 degrees to the center section. The side board kick out cannot exceed 2 inches. 3 inch maximum wicker bill allowed including stock wing turn up.


EXAMPLE Center Section Bodies. No mechanical, electrical or hydraulic adjustments will be allowed in the cockpit area on multi cylinder cars. If you chose to have an inside pan hard adjuster it must be bolted to where it cannot be moved during a race by the driver. Effective 2011: If you win three championships in the Sportsman class you will be required to move out of that division. Drivers in the Sportsman class may run a second class in the same night no more than 5 times before they must choose a permanent class. If you are an Outlaw, A-Class, or Non-Wing driver, you will not be allowed to run the Sportsman class. This rule is intended to make Sportsman a beginner class.


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Any car or driver found illegal will forfeit money for that race, program and all track points for that year.
Refusal to be teched shall be considered a failure.
If car owner wants to select a mechanic to disassemble the motor, the car owner is responsible for all fees
incurred.
Race Director/ Promoter will take immediate possession of motor upon protest.
For any class in which there is a protest, all prize money will be held until protest is resolved. If the car driven
by a point winner is found to be illegal, all following cars will be moved up one place in the event they finish
behind the point winner and will accrue points and money according to their adjusted positions.
The Race Director and/or Technicians reserve the right to demand inspection of any part of a race car for the
purpose of determining legality, without protest fees.
If a protest is upheld, money will be returned to protesting person. If protest is overturned than money is
awarded to protested car and tech inspector.
Any protest, the person found to be illegal will be responsible for paying the tech fee.
**Must take green flag and make 1 full lap in race to earn points.



FLAGS


THE FLAGS OR LIGHTS ARE OFFICIAL AT ANY POINT DISPLAYED.
Lights out indicate start at line
GREEN Starting the race
YELLOW Caution, No passing. Slow to parade speed, hold your position, and close up single file.
RED Stop at once.
ROLLED BLACK -You are being warned.
WAVED BLACK –Must enter the infield immediately! Do not continue racing. You are disqualified.
WHITE - One lap to go
CHECKERED - Race is over.




RULE BOOK DISCLAIMER
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. The rules and/or regulations set forth herein are
designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements
for such events. These rules shall govern the condition of all events, and by participating in these events, all
participants are deemed to have complied with these rules. NO EXPRESSED OR IMPLIED WARRANTY OF
SAFETY SHALL RESULT FROM PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES AND/
OR REGULATIONS. They are intended as a guide for the conduct of the sport and are in no way a guarantee
against injury or death to a participant, spectator, or official.
The race director shall be empowered to permit reasonable and appropriate deviation from any of the
specification herein or impose any further restrictions that in his opinion do not alter the minimum acceptable
requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH
ALTERATION OF SPECIFICATIONS. Any interpretation of deviation of these rules is left to the discretion of
the officials. Their decision is final.