Rules- 390 Adult Clone




All clone classes must run pump gas
(87 octane)
***All Clone Classes MUST run Billet Fly Wheels

English Creek Speedway

2015 Rules and Regulations 


390 Adult Clone Flat Karts - 390lbs

Any other organized class must be approved by the promoter. 


Mailing Address MLC Motorsports 2005 North Lincoln Knoxville, IA 50138 



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 EXPRESS OR INPLIED WARRENTY OF SAFETY SHALL RESULT FROM PUBLICATIONS OF, OR COMPLAIANCE 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 of a participant, spectator or official.


The race director shall be empowered to permit minor deviation from any of the specifications herein or imposed and further restrictions that, in his opinion, do not alter the minimum acceptable requirements. NO EXPRESS OR IMPLIED WARRANTY SPECIFICATIONS. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.


Drivers and parents or minor drivers are responsible to read and understand the rules and regulations set forth in this book.




English Creek Speedway Clone track rules


1.     Drum Shoe clutch only

2.      All pipes are no tech no loop pipes allowed. All pipes must stay within the rear axle and point down or must return in to tail. All pipes must be approved by track promoter.

3.     All pipes must use a RLV-91_L

4.     ECS will not have a claim rule in any class.

5.     Pulse-type fuel pump is not required.






1.        Frames must be of kart configuration. Not to exceed 90” in overall length. No EXCEPTIONS. Kart not to exceed 350 lbs. including full tank of gas.

2.        NOISE:

A.      Must meet state noise levels.

B.       Karts in Violation may not race until standards are met.

3.     ALL KARTS MUST DISPLAY 6”BLACK NUMBER ON WHITE BACKGROUND ....Numbers that are not legible will not be scored.

4.       Duplicate numbers must include a letter. Must be a minimum of 6”.

4.      Numbers must be displayed on contrasting backgrounds.

5.      Safety committee and track officials’ decision is final.

6.  All drivers under the age of 18 must provide a notarized minor’s release form to the scorekeepers. A new form is required for each season. In addition, when parent or guardian is not in attendance, drivers must provide us with a designated guardian form. A NEW FORM IS REQUIED FOR EACH RACE.                                                                            

7. Any other organized class must have a minimum of 12 karts and be approved by   the promoter.  

8. Should your car enter the infield during a race you must slow down and come to a stop at the edge of the track at that time a yellow flag well come out.


All Clone class must run pump gas only 87 Octane - no additives

All other classes - no tech on fuel

B. Karts will be tested for fuel requirements. Fines will be assessed for failure    to meet any one of the four tests in (b) above.



The following safety rules have been imposed by 2013 safety Committee.



1.      Brakes must be in good working condition at all times.

2.      All karts must have seat belts and shoulder harnesses. Shoulder harnesses must be mounted in a way to restrict forward body motion independently of the seat. Lap belts should be mounted on frame. Cut or frayed seat belts will not be allowed. This entire rule will be strongly enforced.

3.      Approved neck braces and arm restraints are mandatory. Arm restraints must be attached to lap belt and worn below the elbow.

4.      HELMETS:

a.       Snell 2005 or SFI 24.1 approved with face shield only.

b.      Must fit driver’s head.


5.      Seat Securely mounted to the frame.

A.      No excessive holes. 

6.      All drivers must maintain a working fire extinguisher in their pit area.

7.      All karts must have a 6” nylon tie attached to spark plug wire.

8.      Kill switches are recommended.

9  No sharp or protruding objects on any part of the kart.

10.  Fuel line location cannot be closer than 2” to any of the exhaust system at any time and shall not be above the exhaust. If closer than 2”, fuel line must be insulated.  Fuel line must have ample slack for cage movement. Must be petroleum grade fuel line.

11.  Fuel tank location: Out board mounted fuel tanks must have metal protection, particularly grade fuel line.

12.  No axle protrusion beyond wheel rim. Max axle length 40”.

13.  Smoking in pit area is not recommended. Use common sense.

14.  RED LIGHT: WHEN THE RED FLAG COMES OUT, AND THE LIGHTS COME ON YOU MUST COME TO A COMPLETE   STOP.  AS SOON AS IT IS SAFE. You must not pass the accident. If in the opinions of the officials you did not stop when you should have you well be disqualified. Once the officials say it safe the pit gate well open for one pitman per kart if more then one person attends to a kart that kart well be disqualified.

15.  Pitmen are not allowed on racetrack or infield while race is in progress. Violators will result in their kart being disqualified.


17.  SPEEDING IN THE PIT AREA will result in a $50.00 fine and loss of points. Officials and Safety Committee members are authorized to issue fines.

18.  Any Official is permitted to remove karts from racetrack due to unsafe conditions to driver and/or other karts.

19.  Safety Committee and Track Official’s decision is final.

20.  Chain guards are mandatory. Appropriate design to prevent injury to arm. If in doubt, see safety tech.

21.  Karts will be inspected using the following safety list.

IMMEDIATE- must be fixed same day.

SECONDARY-must be fixed by the following race date or pay $25.00 fine. Failure to fix by third face will result in suspension of kart.




             Seat belt & harness mounted

             Arm restraints

             Neck brace


            Steering link, lock nuts or cotter keys

             Protruding objects

             Axle Protrusion

             Fuel Line Location

             Spindles- Cotter Keyed

             Cage-Mounts height

              Floor Pan Condition

                Seat – Condition/Mounting


             Kill Switch

             Wheel Condition

             Rear Axle Keepers


             Fire Extinguisher



             Chain Guard


Any Official has the authority to disqualify a kart for safety violations.

 No traction control devices allowed.




1.        GREEN FLAG: The entire track is open for racing. Passing will not be permitted before the green flag is displayed, at designated point. Single file starts will be at MEDIUM SPEED, until the lead kart begins to race. At this point the green flag will be displayed and racing will begin.

A.  Double file starts. The two lead karts must stay side by side, at MEDIUM SPEED, until reaching the start cone. After two attempts if we do not get a side by side start the front row will move to the last row.

2.     RED/YELLOW FLAG: Restart race. This will happen on the first lap only. All races will be entitled to two restarts.

3.     YELLOW FLAG: CAUTION, All karts must come to a parade lap speed. Failure to do so will result in being sent to the back. Karts must be in single file formation (nose to tail). Line up reverts back to previous lap for line up.


        A.  Revert back to previous lap for line up.

        B.  Once the pit gate is open only one pitman per kart is allowed.


5.     BLUE/YELLOW FLAR: MOVER OVER. To inform slower moving karts that leaders are about to pass. Move over with CAUTION.

6.     BLACK FLAG: PROCEED TO THE INFIELD for consultation. Kart will cease being scored from time flag is displayed.


8. CHECKERED FLAG: Race is officially over. All karts must pass under this flag to be scored.

9.     If a kart has a safety problem on the racetrack and an Official can easily fix it, kart will resume position.

10.   Jump starts will result in a loss of two positions. This will be imposed at next yellow or at the end of the race.

11. Drivers who are involved in or the cause of a yellow or red flag will start in the back of the pack. The TWO SPIN rule is in effect. Should you be involved, cause or have to be restarted at any time you will be charged with one spin.

12.   NO REFUNDS issued once kart reaches track.

13.   At no time will a driver or a kart representative may enter the scorers booth without permission of the head scorer. Should you enter the scorer booth with out permission you kart or the kart you are representing may RESULT IN DISQUALIFICATION.

14. Quads are to be used for pushing karts only.

15. Quad operators must be a minimum of 15 years old.



1.        Alcohol beverages are not allowed in the pit area.

2.        Anyone observed drinking any type of alcohol during the race program will be disqualified.

3.        You are responsible for your pit crew members. If a member of your pit crew is observed drinking alcohol you will be disqualified.



1.        Any person found using or under the influence of drugs will be disqualified   plus banned from the racing facility indefinitely.  




1.        Fighting on premises will result in permanent suspension. Drivers are responsible for the action of their pit crew.

2.        ANY display of unsportsmanlike conduct (on or off the track) will result in a FINE, SUSPENSION, IMMEDIATE REMOVAL FROM RACE AREA, POINT PENALTIES, and OR ALL OF THE ABOVE.

3.        Rough driving will result in docked position, fine or black flag.

4.        Pit crew members observed verbally or physically abusing driver will result in loss of accrued points for their driver and/or fine. NO EXCRPIONS!

5.        Any person entering an other persons pit in an adverse manner will result in the kart that are associated with being disqualified and possible fines and suspension    

6.        We have the right to refuse service to anyone





1.        Point system will be disclosed at the first race. Copies available at sign-in booth, upon request.

2.        Drivers must have a valid Competitor’s License to race and/or be eligible for points

3.        Drivers may time in only ONE kart number in their class and run that number kart for the entire event.

4.        To be eligible for points and awards, licensed drivers must not miss more than four point races, per series.

5.        Borrowing a kart is permitted. Kart must display DRIVER’S registered number. SCOREKEEPERS MUST BE NOTIFIED of any changes.

a.       No borrowing allowed after the green flag has been thrown.

6.        Substitute drivers are permitted for only two scheduled point races.

7.        Points and winnings are awarded to registered kart number.

8.        You must be present at awards banquet to receive awards and/or prize money.

9.      all classes except the open Class are trophy classes.





ALL Adult 390 Clone Flat Karts


Rule changes are simple: 

1. Bolts on side covers for all 390 clone classes are non-tech. 

2. Triple angled is now legal but must stay in stock configuration.  

.May run any tires Tire doping of any kind is not allowed.

Age limit:

a.     Driver must be at least 14 years old

NOTARIZED MINOR RELEASE IS MANDATORY. A new release for every race season.
In addition, when parent or guardian is not present at race event, a DESIGNATED GUARDIAN form is mandatory. One for each race.
Minor must be accompanied by an adult at all times while in the pit area. Parent/Guardian is responsible for the actions of their minor child. Bike riding and playing in the pit area is prohibited.
Any parent/guardian or pit crew member observed verbally or physically abusing other drivers will result in a fine and/or loss of points for their driver. NO EXCEPTIONS!

BP (Builder Prepared) 6.5 OHV – Fuel Pump Gas ONLYPulse-type fuel pump is not required. Approved Engine: 6.5 OHV 196cc clone engine modified only according to BP OHV Engine Spec. Tires are track/series option.

Single cylinder, 2-valve overhead 4-cycle engine. No aftermarket coatings of any type are permitted on any part of the engine (exception Blower Housing and Shrouds).

Cylinder Head Requirements: Stock cylinder head only. Machining of gasket surface is allowed. No addition of material in ports or to cylinder head allowed. Porting and / or grinding are not permitted. Valve seats may have two angles, 45° valve face and 30° top relief. Inside diameter of valve seats must be stock(Into .897” max ID and Ex .862” max ID). Valve seats must appear stock and must be in stock position and depth. Stock head bolts are required and all four are required.
Head gasket/s maybe after market, must be of stock configuration, and gasket thickness non-tech. Depth check between the valves, front to back and side to side may not vary by more than .005” max. Cylinder head guide plate for pushrods must remain stock. No other alterations to the stock head are permitted.

Bore and Stroke: Stock bore is 2.685” and may be over bored to 2.718” Stroke is 2.123” +/- .005”.
Connecting Rod: Stock or Billet aluminum rods, with or without bearing inserts allowed. No titanium rods allowed. Rod length is a non tech item.

Combustion Chamber Volume: 25 cubic centimeter minimum, with piston at TDC, using prescribed procedure. The Liquid CC check is the official check (IF THE ENGINE FAILS THE CC LIQUID CHECK AT ANY TIME DURING THE TECH PROCEDURE IT MUST BE CALLED ILLEGAL).

Carburetor/Intake Requirements: Stock Huayi or RUI*ING carb.
Venturi .625” NO-GO. Rear carb bore .751” NO-GO. Carb bore finish, non tech. Throttle shaft - .115” minimum. Butterfly - .037” minimum. Air Filter adapter of 1.375” max length allowed. No air rams. Pulse-type fuel pump is mandatory. Fuel pump must be pulsed from either the crankcase or the valve cover. Black phenolic carb insulator must be used. Choke assembly may be removed. Jets, air bleeds jets, and emulsion tubes are non-tech. Throttle shaft, washer, and butterfly must be stock and must be present, butterfly screw non tech. Stock intake runner gasket configuration only. One extra gasket may be used with restrictor plates. No other alterations are permitted.

Ignition system: Ignition timing is non tech. Stock ignition module only. No modifications of any type allowed. Sparkplug connector must be stock as from factory.

Piston Requirements: Must be stock dished piston with no modifications. Oversize Clone or Honda ZOT dished piston is allowed up to .035" oversize. Rings must appear stock and all rings must be installed. Piston may not pop out above cylinder deck.

Valve Train
: Stock valve-train only in stock configuration except: Any single valve springs and valve spring shims are allowed; Any 5.5mm stem steel valve (including stainless) that uses stock retainers allowed. Intake valve head Max OD .982” +/- .005” and Exhaust valve head Max OD .945” +/- .005”. Valves must be one angle only, 45°. No knife edging of valves (1mm min. margin). Valve length is non-tech. No additional support for rocker studs permitted. Champion rocker arm assembly and valve cover allowed

Camshaft Requirements:
Stock camshaft cores only, ez-spin assy must remain as stock.
Duration check for Intake and Exhaust lobes (taken off pushrod) . Intake duration of 248 degrees at .050 lift/107 degrees at .200 lift. Exhaust duration of 247 degrees at .050 lift/116 degrees at .200 lift. Max lift at the valve retainers, Intake .238” and exhaust .242” taken on valve spring retainer with zero lash. (To achieve zero valve lash for checking running lift, preload dial indicator by .001”.)

Crankshaft Requirements:
Stock, factory crankshaft only with stock, factory timing gear in factory location. No modifications to crankshaft allowed. Aftermarket steel main bearings of non self-aligning type, with or without seal are allowed. No ceramic bearings. Crankshaft Journal diameter is 1.180”, 1.168” minimum.

Block Requirements: Stock Block, as cast and produced with no alterations or modifications other than those specifically permitted. Block head matting surface may be machined, however, no piston pop out is allowed. Blocks may NOT be welded for repairs. No addition of material to block (i.e. welding, jb weld, etc). All bolt bosses in block may be drilled and tapped for repairs or other uses. Additional side cover gaskets as required for crankshaft thrust are permitted. All parts associated with the governor and the low oil sensor may be removed, plugging any associated holes.

Flywheel: Approved SFI certified billet aluminum flywheel only. No machining or alteration of any kind allowed. Minimum weight for flywheel is 3.3 lbs. Any timing key or no key at all may be used. A flat washer or spacer may be used, and is recommended, between the flywheel and the nut. Handheld electric starter may be used, but compression release mechanism must remain on camshaft.
Current Approved flywheels: ARC 6619, ARC 6618, Raceseng Flywheels RSP-13-075 Rewheel NF- S1 & RSP-13-077 Rewheel F-S1.

Header and Muffler Requirements: Header Pipe Length: Minimum 18”- Maximum 22”. All pipes must use a B91XL Muffler (Round holes unaltered) a small hole in the end (bottom) allowed for safety wire. Safety wire must be present. Header must be securely wrapped from flange to muffler prior to the race.
Exhaust Pipe must be double nutted or safety wired and silencer must be supported by clamped on brace to secure it in place.

+/- .005 or 2 degrees on all measurements to allow for gauge variances and wear.

 *************REMINDER ************

All clone classes must run pump gas(87 octane)


Approved billet flywheels are mandatory in all clone classes.


A billet rod is mandatory in all classes using builder prepared rules.




All clone classes must run pump gas
(87 octane)
***All Clone Classes MUST run Billet Fly Wheels


Class Motor Rules

        R-Box Stock

Box Stock           BP (builder prepared)

Adult Outlaw Wing        BP (builder prepared)

Adult 390 Clone       BP (builder prepared)

 125/250  Outlaw        125 cc 2 stroke 250cc 2 and 4 stroke

Open/500  Outlaw        450cc 4 stroke and 500cc 2 stroke


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