270cc Microsprints
1. All cars should be constructed to look like microsprints. All cars must be equipped with complete
body panels (hood, tail, side panels, belly pan, etc.)
2. Roll cages must be constructed of 4130 chrome moly tubing. Minimum diameter 1 ¼” OD, .065” wall
thickness OR 1” OD .083” wall thickness.
3. Belly pan must extend from the front of the seat to the nose of the car.
4. All steering and suspension parts that are bolted together must use locking nuts, safety wire, or
cotter pins.
5. All cars must be equipped with nerf bars extending to at least the inside edge of the front tire and
middle of the rear tire. May not extend beyond the outside of the tread width of any tire.
6. No centrifugal clutches or belt drives.
7. 4 point racing harness mandatory, minimum width of 2 ½”. May not be more than 5 years old as of
first race of the season.
8. With driver seated in car, there must be a minimum of 3” of clearance between the driver’s helmet
and the upper roll bar.
9. Brakes must be of sufficient strength as to stop the wheels in the pits or stop the car while in motion
on the track.
10. Car must be equipped with a fuel shutoff valve and kill switch. Both must be functional, within reach
of the driver, and clearly marked.
11. Sharp pointed objects will not be tolerated.
12. Radiators should be mounted in a manner that makes it highly unlikely that it will be contacted by
another car.
13. Steering mechanism must be constructed of a minimum of 5/8” rod and 3/8” heims.
14. Cars must have front and rear bumpers. Rear bumper must be suitable for push start. Track not
responsible for car damage due to push starting or pushing/removing from track.
15. Wheelbase - 56” minimum, 72” maximum.
16. Overall width - Shall not exceed 59” sidewall to sidewall.
17. All wheels must be race approved, 8 or 10 inch diameter only.
18. Engine Specs: Any single cylinder 250cc full production engine. Maximum of 271cc permitted. No
forced air induction or fuel injection. Any height compression head is legal. Gas or alcohol only! No
additives other than top end lube.
19. Sprint car type window net RECOMMENDED on left side of the cage.
20. Torque arm must be secured by a minimum ¼” cable or chain, or other reasonable safety device.
21. Welded Spindles must have skid plates
22. All cars must have a top wing at all times. Must be securely fastened. If damaged during race, car
may continue provided it is still reasonably secure. NO CARS WILL RUN WITHOUT TOP WING!
23. Top wing may not exceed 12 sq. ft. Side panels must not obstruct the view of the driver and cannot
extend past the center section by more than 10 inches, front or back. 24” x 54” side panel maximum.
24. Nose wings allowed. Maximum size 28” x 18”. Must not mount forward of front bumper.
25. QUIET PIPES ARE REQUESTED IF YOU HAVE ONE! If noise becomes an issue with the township,
they will become MANDATORY!
26. All added weights must be painted white with car number clearly marked on it. Weights must be
securely fastened with locknuts, double nutted, or must be drilled and secured with a cotter key.
27. A 450cc 4-Stroke engine may compete in the 270cc Microsprint division. All chassis/weight rules will
remain the same regardless of engine. May be converted to alcohol. If running gas, MUST have a tank
bladder.
A. MUST retain stock stroke.
B. Boring permitted.
C. NO injection. Carb only.
D. Clutch may be removed.
E. MUST HAVE MUFFLER!
F. Racer must have a manual for the engine they are running for informational purposes.
G. It is our hope that by allowing the 450's to compete, that we will be better prepared for the future in
regards to this division. We reserve the right to make any rule amendments we deem necessary to
maintain a level playing field.
1. All cars should be constructed to look like microsprints. All cars must be equipped with complete
body panels (hood, tail, side panels, belly pan, etc.)
2. Roll cages must be constructed of 4130 chrome moly tubing. Minimum diameter 1 ¼” OD, .065” wall
thickness OR 1” OD .083” wall thickness.
3. Belly pan must extend from the front of the seat to the nose of the car.
4. All steering and suspension parts that are bolted together must use locking nuts, safety wire, or
cotter pins.
5. All cars must be equipped with nerf bars extending to at least the inside edge of the front tire and
middle of the rear tire. May not extend beyond the outside of the tread width of any tire.
6. No centrifugal clutches or belt drives.
7. 4 point racing harness mandatory, minimum width of 2 ½”. May not be more than 5 years old as of
first race of the season.
8. With driver seated in car, there must be a minimum of 3” of clearance between the driver’s helmet
and the upper roll bar.
9. Brakes must be of sufficient strength as to stop the wheels in the pits or stop the car while in motion
on the track.
10. Car must be equipped with a fuel shutoff valve and kill switch. Both must be functional, within reach
of the driver, and clearly marked.
11. Sharp pointed objects will not be tolerated.
12. Radiators should be mounted in a manner that makes it highly unlikely that it will be contacted by
another car.
13. Steering mechanism must be constructed of a minimum of 5/8” rod and 3/8” heims.
14. Cars must have front and rear bumpers. Rear bumper must be suitable for push start. Track not
responsible for car damage due to push starting or pushing/removing from track.
15. Wheelbase - 56” minimum, 72” maximum.
16. Overall width - Shall not exceed 59” sidewall to sidewall.
17. All wheels must be race approved, 8 or 10 inch diameter only.
18. Engine Specs: Any single cylinder 250cc full production engine. Maximum of 271cc permitted. No
forced air induction or fuel injection. Any height compression head is legal. Gas or alcohol only! No
additives other than top end lube.
19. Sprint car type window net RECOMMENDED on left side of the cage.
20. Torque arm must be secured by a minimum ¼” cable or chain, or other reasonable safety device.
21. Welded Spindles must have skid plates
22. All cars must have a top wing at all times. Must be securely fastened. If damaged during race, car
may continue provided it is still reasonably secure. NO CARS WILL RUN WITHOUT TOP WING!
23. Top wing may not exceed 12 sq. ft. Side panels must not obstruct the view of the driver and cannot
extend past the center section by more than 10 inches, front or back. 24” x 54” side panel maximum.
24. Nose wings allowed. Maximum size 28” x 18”. Must not mount forward of front bumper.
25. QUIET PIPES ARE REQUESTED IF YOU HAVE ONE! If noise becomes an issue with the township,
they will become MANDATORY!
26. All added weights must be painted white with car number clearly marked on it. Weights must be
securely fastened with locknuts, double nutted, or must be drilled and secured with a cotter key.
27. A 450cc 4-Stroke engine may compete in the 270cc Microsprint division. All chassis/weight rules will
remain the same regardless of engine. May be converted to alcohol. If running gas, MUST have a tank
bladder.
A. MUST retain stock stroke.
B. Boring permitted.
C. NO injection. Carb only.
D. Clutch may be removed.
E. MUST HAVE MUFFLER!
F. Racer must have a manual for the engine they are running for informational purposes.
G. It is our hope that by allowing the 450's to compete, that we will be better prepared for the future in
regards to this division. We reserve the right to make any rule amendments we deem necessary to
maintain a level playing field.
 |  |  |