| Miami County Speedway 1079 West 200 North Peru, Indiana 46970 Track 765-475-9705 Additional Information: 574-753-3238 * 765-513-5535 * 317-541-8510 |
| Saturday Night Racing at the Miami County Fairgrounds |
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| Junior Class Rules |
1) AGE
Drivers ages 6 through 12 (A driver whose 13th birthday falls during the
racing season will be allowed to finish the season in which they began accruing
points before their birthday) may compete in the "J" Class. A copy of birth
certificate or state issued photo ID must be provided for any driver under the
age of 18.
2) ROLLCAGE
Roll cages shall be at least 1 inch .083 wall thickness mild steel, or 1 inch .065
wall thickness chromoly steel. 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 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 in above the drivers helmet. It is mandatory to
install a cross brace behind the seat to support the shoulder harness.
3) BUMPERS and NERFS
Car 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 of the tires or wheels,
whichever is the widest. No sharp corners or design 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.
4) 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 three years old. (Example: Oct 11 may
be used in 2012, 2013 and 2014.) 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 approvals. All drivers will wear a name brand flame-retardant
uniform. Neck braces, cage nets and/or head and neck restraints with a SFI
3.2-1 rating or higher are mandatory. SFI gloves are mandatory for safety.
5) ELECTRICS and 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. No radio communication is
allowed with the car or the driver. Cockpit controls: carb adjusters, kill
switch, starter button and engine monitor. No wing sliders or pan hard
adjusters driver operated in cockpits.
6) BATTERY
All wet cell batteries mounted in the cockpit must be covered and vented
outside the cockpit area.
7) FUEL
Cars must run 94 or less octane. It must be purchased at Gallahan's Truck stop
located on US31, the Gallahan's Quick Mart located in Peru or at the Miami
County Speedway. Performance enhancing additives are prohibited.
8) WEIGHT
Junior class cars, minimum car and driver weight 400 lbs.
9) SUSPENSION
Coil-over shock suspension only. Tread: Maximum 56 inches outside to
outside of rear tires. Minimum 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 minumum 1 1/4" dia. 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.
10) SHOCKS
Aluminum or steel body shocks are legal.
11) BRAKES
Brakes will be of sufficient strength so as to slide the wheels while the car is in
motion at any given time
12) TIRES and WHEELS
Wheels to be 8" dia steel, aluminum or carbon fiber. Right rear spec tire to be
16 x 8.50 x 8 American Racer JKKN8 stamped NMMA or 16x 8.5 x 8 Hoosier
stamped RD 20. There can be no grooving, siping, softening or altering the
tire in any way. It should be as it arrives from the manufacturer. Wheels must
be held on with 4 or more standard lugs or knock off hubs.
13) 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 .050" aluminum. Body of car must be made of
aluminum, metal, fiberglass or high impact plastic. 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. All mechanically operated devices must be
mounted below the drivers shoulders for safety. All fuel tanks must be
equipped with a one-way check valve designed to prevent the spillage of fuel
from the fuel tank vent in the event of a rollover.
14) TRANSMISSION
The drive will be by engine or jackshaft mounted clutch. No axle mounted
clutches allowed. No direct drive will be allowed. 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.
15) 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. allowed.
16) WINGS
Right side board, maximum 42" x 20". Left side board, 42" x 20". Minimum
size is 6 sq. ft. The wing cannot be mounted outside the centerline of the
tires. Side boards may not extend more than 3" beyond center section and
sides must cover center section. All wings must have 1/16" radius edges or
edging. No raw edges. No wood except for ribs or spars inside center section.
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 wings are
mandatory to enter a night's event. Cars may finish without a wing if no
replacement is available.
17) NUMBERS
All cars must have legible numbers painted in contrasting colors on both sides
of car and the nose. Minimum height of numbers is 8" on the nose and nose
wing, 10" on each side of the tail and 12" on the wing. Numbers must be
separated from advertising so they will be readable. No gold or silver leaf or
prismatic numbers will be allowed on the cars. Remember: The easier your
numbers are to read, the easier they are to score!
18) HUBS
Front hubs; Go kart type with 5/8" bearings and 5/16" wheel studs minimum.
Rear hubs; Douglas 5 x 130 Go kart type or equivalent.
19) STAGING AREA
Once a car enters the staging area it is considered race ready. No legality
changes may be made. If a car is not legal once it reaches the staging area it
will be disqualified for that specific event.
20) COCKPIT ADJUSTMENTS
Functioning cockpit adjustments are NOT allowed.
21) SELF STARTING
All cars must be self starting. Any car requiring a push vehicle from the
staging area will start at the tail of that race.
22) ENGINE
The two engines approved for the Jr. Sprint Class are the 100cc Yamaha
KT-100-S and the Briggs & Stratton World Formula. Yamaha engines must use
the SSX by RLV 4-hole canister muffler. This comes in 3 styles: up, down, left
and right hole position. This is also available in 4 hole 90 degree model. The
Briggs World Formula will use a RLV 5442S header and RLV 4100 silencer or
stock pipe as defined in the Briggs World Formula rules. Loosely mounted
mufflers/silencers will mean disqualification. If your muffler falls off during
the race you will be disqualified. Engine legality will be determined by using
the Yamaha specification sheets by the NMMA. The IKF rules for KT100 apply
except for the exhaust. Briggs & Stratton engine must meet the Kid Sprint
USA Briggs & Stratton World Formula Rules dated 03-21-07 or later. These
can be found at www.gokartracingengines.com.
Drivers ages 6 through 12 (A driver whose 13th birthday falls during the
racing season will be allowed to finish the season in which they began accruing
points before their birthday) may compete in the "J" Class. A copy of birth
certificate or state issued photo ID must be provided for any driver under the
age of 18.
2) ROLLCAGE
Roll cages shall be at least 1 inch .083 wall thickness mild steel, or 1 inch .065
wall thickness chromoly steel. 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 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 in above the drivers helmet. It is mandatory to
install a cross brace behind the seat to support the shoulder harness.
3) BUMPERS and NERFS
Car 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 of the tires or wheels,
whichever is the widest. No sharp corners or design 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.
4) 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 three years old. (Example: Oct 11 may
be used in 2012, 2013 and 2014.) 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 approvals. All drivers will wear a name brand flame-retardant
uniform. Neck braces, cage nets and/or head and neck restraints with a SFI
3.2-1 rating or higher are mandatory. SFI gloves are mandatory for safety.
5) ELECTRICS and 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. No radio communication is
allowed with the car or the driver. Cockpit controls: carb adjusters, kill
switch, starter button and engine monitor. No wing sliders or pan hard
adjusters driver operated in cockpits.
6) BATTERY
All wet cell batteries mounted in the cockpit must be covered and vented
outside the cockpit area.
7) FUEL
Cars must run 94 or less octane. It must be purchased at Gallahan's Truck stop
located on US31, the Gallahan's Quick Mart located in Peru or at the Miami
County Speedway. Performance enhancing additives are prohibited.
8) WEIGHT
Junior class cars, minimum car and driver weight 400 lbs.
9) SUSPENSION
Coil-over shock suspension only. Tread: Maximum 56 inches outside to
outside of rear tires. Minimum 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 minumum 1 1/4" dia. 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.
10) SHOCKS
Aluminum or steel body shocks are legal.
11) BRAKES
Brakes will be of sufficient strength so as to slide the wheels while the car is in
motion at any given time
12) TIRES and WHEELS
Wheels to be 8" dia steel, aluminum or carbon fiber. Right rear spec tire to be
16 x 8.50 x 8 American Racer JKKN8 stamped NMMA or 16x 8.5 x 8 Hoosier
stamped RD 20. There can be no grooving, siping, softening or altering the
tire in any way. It should be as it arrives from the manufacturer. Wheels must
be held on with 4 or more standard lugs or knock off hubs.
13) 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 .050" aluminum. Body of car must be made of
aluminum, metal, fiberglass or high impact plastic. 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. All mechanically operated devices must be
mounted below the drivers shoulders for safety. All fuel tanks must be
equipped with a one-way check valve designed to prevent the spillage of fuel
from the fuel tank vent in the event of a rollover.
14) TRANSMISSION
The drive will be by engine or jackshaft mounted clutch. No axle mounted
clutches allowed. No direct drive will be allowed. 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.
15) 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. allowed.
16) WINGS
Right side board, maximum 42" x 20". Left side board, 42" x 20". Minimum
size is 6 sq. ft. The wing cannot be mounted outside the centerline of the
tires. Side boards may not extend more than 3" beyond center section and
sides must cover center section. All wings must have 1/16" radius edges or
edging. No raw edges. No wood except for ribs or spars inside center section.
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 wings are
mandatory to enter a night's event. Cars may finish without a wing if no
replacement is available.
17) NUMBERS
All cars must have legible numbers painted in contrasting colors on both sides
of car and the nose. Minimum height of numbers is 8" on the nose and nose
wing, 10" on each side of the tail and 12" on the wing. Numbers must be
separated from advertising so they will be readable. No gold or silver leaf or
prismatic numbers will be allowed on the cars. Remember: The easier your
numbers are to read, the easier they are to score!
18) HUBS
Front hubs; Go kart type with 5/8" bearings and 5/16" wheel studs minimum.
Rear hubs; Douglas 5 x 130 Go kart type or equivalent.
19) STAGING AREA
Once a car enters the staging area it is considered race ready. No legality
changes may be made. If a car is not legal once it reaches the staging area it
will be disqualified for that specific event.
20) COCKPIT ADJUSTMENTS
Functioning cockpit adjustments are NOT allowed.
21) SELF STARTING
All cars must be self starting. Any car requiring a push vehicle from the
staging area will start at the tail of that race.
22) ENGINE
The two engines approved for the Jr. Sprint Class are the 100cc Yamaha
KT-100-S and the Briggs & Stratton World Formula. Yamaha engines must use
the SSX by RLV 4-hole canister muffler. This comes in 3 styles: up, down, left
and right hole position. This is also available in 4 hole 90 degree model. The
Briggs World Formula will use a RLV 5442S header and RLV 4100 silencer or
stock pipe as defined in the Briggs World Formula rules. Loosely mounted
mufflers/silencers will mean disqualification. If your muffler falls off during
the race you will be disqualified. Engine legality will be determined by using
the Yamaha specification sheets by the NMMA. The IKF rules for KT100 apply
except for the exhaust. Briggs & Stratton engine must meet the Kid Sprint
USA Briggs & Stratton World Formula Rules dated 03-21-07 or later. These
can be found at www.gokartracingengines.com.