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Rules

2013

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********REMINDER************

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

English Creek Speedway

2013 Rules and Regulations 

Classes

Restrictor Box Stock 245 Lbs

Box Stock 300 Lbs.

125cc Outlaw  375 Lbs.

250cc Outlaw 420 Lbs.

Open/500cc Outlaws 450 Lbs. 

Adult Wing Outlaws 425 Lbs. 

390 Adult Clone Flat Karts - 390lbs

Any other organized class must be approved by the promoter. 

641-842-5454 

Mailing Address MLC Motorsports 2005 North Lincoln Knoxville, IA 50138 

Disclaimer:

 

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.

 

IF WE DON’T SAY YOU CAN-YOU CAN’T.

 

English Creek Speedway Clone track rules

Exceptions:

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.

 

 

YOU ARE RESPONSIBLE FOR THE SAFETY OF YOU AND YOUR KART!

ALL CLASSES

 

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.         TIRES
All wing classes will run treaded tires  (r-box, box stock, 125cc and open).You have your choice of three manufactures (Burris, Hoosier and Rocket Boy only).The right rear must durometer 55 the other three tires do not have a durometer rule. Cutting or grooving of slick does not count as a treaded tire. Only manufactured treaded tires are allowed. Syping and Grooving is allowed.
Tire doping of any kind is not allowed. 

3.        Cages are mandatory. Must be for protection of driver. Not for looks or wing mounts.

4.        Wing sides must stay within 3” from outer most edge of kart. No sharp edges or too long of bolt. Overall length 48” maximum.

5.        Uppermost part of kart and wing not to exceed 76”.

6.        Bodies can be any material, except wood. No sharp edges or protruding parts.

7.        Wing, hood and tail piece are mandatory in all classes.

8.        No bars, other than regular Nerf bar, may extend out past outer edge of the tire on either side of kart.

9.        NOISE:

A.      Must meet state noise levels.

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

10.     ALL KARTS MUST DISPLAY 10” NUMBERS OR RIGHT AND LEFT SIDE              OF KART AND WING AND INSIDE LARGE WING PANEL. Numbers that are not legible will not be scored.

11.      Duplicate numbers only in open class. Duplicate numbers must include a letter. Must be a minimum of 6”.

12.      Numbers must be displayed on contrasting backgrounds.

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

14.      This is open wheel racing, No front-end cowcatchers. If in doubt, see officials.    

15.  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.                                                                            

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

17. 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.

18. The muffler is a B91XL (round hole muffler) unaltered. A small hole in the end (bottom) allowed for safety wire. Safety wire must be present.+ Or - .005" or 2 degrees on all measurements to allow for gauge variances and wear.

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.

SAFETY

 

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

YOU ARE RESPONSIBLE FOR THE SAFETY OF YOU AND KART.

 

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

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.      Aluminum high back seats are MANDATORY. The top of the seat should be at the middle of the driver’s head.

a.       Seat mounts.

1.      Securely mounted to the frame.

2.      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.      Minimum standard for roll cage (tubing thickness):

a.       All classes ¾ “ .083 chrome molly or 1” .06 chrome molly or 1”.083 steel.

b.      No exotic steel.

10.   Driving apparel: Driving suits required SFI  3-2A/1 min.

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

12.  Roll cage must be securely fastened with a safety chain and grade 5 or better bolt, in at least four spots.

13.  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.

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

15.  Suicide doors: No suicide bars. Side bar must open from the rear. Left side protection is recommended.

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

17.  Tail piece protection: If the top of the rail section protrudes above the seat, tail must be padded. Suggested padding: plumbing foam. Tail section must be securely attached to the frame.

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

19.  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.

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

21.  During a yellow flag, WORK ON KARTS ON RACETRACK IS PROHIBITED.

22.  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.

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

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

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

26.  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.

 

IMMEDIATE 

             Helmet-fit/condition

             Seat belt & harness mounted

             Arm restraints

             Neck brace

             Brakes

             Suicide doors

             Steering link, lock nuts or cotter keys

             Protruding objects

             Axle Protrusion

             Fuel Line Location

             Spindles- Cotter Keyed

             Cage-Mounts height

             Frame, Nerf Bars, Bumpers, and Roll Cage

             Floor Pan Condition

                Seat – Condition/Mounting

SECONDARY 

             Wing-Mounts

             Suspended Seat Karts

             Kill Switch

             Wheel Condition

             Rear Axle Keepers

             Hood & Tail Mounts

             Tail Piece Protection

             Fire Extinguisher

             Number/Letter-Size/Location

             Box Stock Muffler (Less Spark Arrestor)

             Chain Guard

 

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

27.  No nose wings allowed.

28.   All karts must maintain a sprint car like appearance.

29.  No traction control devices allowed.

 

RACING RULES & ETIQUETTE

 

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 the front row will move to the last row

B.AT 3rd restart line up will be single file

C. If car drops out before Start of a race other karts will be moved up in that row - NO STAGGERING of line up

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.

4.     RED FLAG: STOP AS SOON AS SAFELY POSSIBLE.

        A.  Revert back to previous lap for line up.

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

        C.  FAILURE TO OBSERVE THE RED FLAR WILL RESULT IN DISQUALIFICATION.

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.

7.     WHITE FLAG: ONE LAP TO FINISH.

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.  ***After second spin Kart and driver will be directed to go to the center of the infield and wait in Kart until race is concluded Only exception is Restrictor Box Stock are a Three Spin rule

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.

 

ALCOHOL BEVERAGES

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.

 

CONTROLLED SUBSTANCE

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

 

UNSPORTSMANLIKE CONDUCT

 

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

 

 

POINT RULES

 

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.

 

 

 

                Box stock  CLASS

300lbs 

TIRES
All wing classes will run treaded tires (r-box, box stock, 125cc and open).You have your choice of three manufactures (Burris, Hoosier and Rocket Boy only).The right rear must durometer 55 the other three tires do not have a durometer rule. Cutting or grooving of slick does not count as a treaded tire. Only manufactured treaded tires are allowed.S yping and Grooving is allowed.
Tire doping of any kind is not allowed.
 

Age limit:

a.     Restrictor Box Stock : age 5 to 8 (All exceptions must be approved by promoter.)(.425 restrictor plate)

b.    Box Stock : age 8 to 12  (All exceptions must be approved by promoter

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 OHVFuel Pump Gas ONLY – Approved Engine: 6.5 OHV 196cc clone engine modified only according to BP OHV Engine Spec. Tires are track/series option.

ENGINE SPEC SHEET FOR BP 6.5 OHV CLASS
Description:
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” +.010”-.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, Racing Flywheels RSP-13-075 Rewheel NF- S1 & RSP-13-077 Rewheel F-S1.

Header and Muffler Requirements: Header Pipe Length: Minimum 18”- Maximum 22”. Silencer must be a ( B91XL round hole muffler). 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)

R-Box Stock Age 5 to 8 years – 245 lbs

 

Restrictor Box Stock ENGINE SPECIFIC TECH SHEET FOR: BOX STOCK 6.5 OHV

Description: Single cylinder, 2 valve, OHV 4 cycle engine.(Gas Only)

Must run a ARC green .425 plate

Combustion chamber volume: 26.5 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)

Cylinder Head Requirements: Must be OEM casting only. Porting and / or grinding are not permitted. Valve seats are two angles 45 degrees valve face and 30 degrees top relief. Intake seat maximum ID .897”, Exhaust seat maximum ID .862”.
Outside face of valve may not be below floor of combustion chamber (i.e. don’t sink the valves). Stock head bolts only, must have four. Head gasket/s maybe after market, must be of stock configuration, gasket thickness is a non tech item. Depth check between the valves, front to back and side to side may not vary by more than .005” max. No copper or aluminum gaskets allowed. Any stock configuration exhaust gasket allowed no other sealer.

Block Requirements: Stock cylinder bore is 2.685” max. Stroke is 2.123” + .010” or - .005”. No piston pop out allowed. Matting surface finish of block and cylinder head is a non-tech item, surfacing of both to correct gasket failure and meet cc check allowed
however, no piston pop out is allowed. May use 2 side cover gaskets of stock configuration. Block must remain stock as produced. Stub for governor may be removed and hole plugged. No machining of block allowed. Welding to the block shall be for rod damage repair only and may not constitute a functional modification.

Carburetor requirements: Huayi OR RUI*ING model carb only. Carb to intake sealer is gasket only no other sealer allowed. Choke must be as supplied from factory, but may be fixed to stay in open position. Venturi .615” NO-GO. Rear carb bore .751” NO-GO. Main fuel jet .042” NO-GO.
Low speed idle jet is a Non Tech item. Stock emulsion tube must be used and unaltered, .066’ max ID (no pass through). Side holes in E-Tube 4 holes max in bottom section and 20 holes max in top section. Minimum E-Tube length 1.092”. Throttle shaft - .115” minimum. Butterfly - .037” minimum. Aftermarket air filter adapter allowed (max length of 1.375).

Valve Train: Stock valve cover only with any stock configuration gasket, no sealer.
Factory stock rocker arms 1:1 ratio and push rods only. Stock valves only 45 degree
angle only both valves, Intake valve Max OD
.982” +/- .005” and Exhaust valve Max OD .948” +/- .005”, no modifications allowed. Only Box Stock valve springs. (Installed Height for valve springs .815”, must be checked by using the .815” spring must go gauge with retainer seal in place on intake an exhaust valve if used.) Prescribed check procedure as follows – Remove valve spring, reinstall spring retainer, insert .815” must go gauge in spring location. Gauge must go in both locations Intake and Exhaust with any allowed retainers in place, as raced, during check procedure. Max wire diameter on spring wire is .071” with a maximum tension of 10.8 lbs. at a height of .850”. Lash cap on exhaust valve only. Valve stem seal allowed on Intake and Exhaust valve, maximum lip thickness of .027”. Minimum thickness of Intake retainer .230”, Exhaust retainer .250”. BS lifters only, no modifications allowed.

Ignition system: Stock Box Stock system only and must be unaltered. Kill switch and low oil sensor may be disabled and removed. Flywheel: Box Stock flywheel only (5lbs 4oz minimum) including plastic fins.
BSFW-1 steel billet flywheel allowed on 1/1/12 and mandatory on 7/1/12, same weight check as stock flywheel. No alterations of any type allowed. Timing and flywheel key is non-tech.

Piston and Rings: Must be unaltered Box Stock only. No machining of piston and rings allowed.

Connecting Rod: Stock Box Stock rod only. No machining of any type allowed. Stock rod bolts only.

Crankshaft Requirements: Stock Box Stock crankshaft required. Machining, polishing, addition of material or other alteration of crankshaft is prohibited. Stock factory timing gear mandatory and must be installed in original location. Crankshaft journal diameter is 1.180”max - 1.168” min.

Camshaft Requirements: Stock camshaft cores only, ez-spin assy must remain as stock. Cam lobe base circle diameter .865" -.005”/+.010” Duration check for Intake and Exhaust lobes (taken off pushrod). Intake duration of 219 degrees at .050 lift/86 degrees at .200 lift. Exhaust duration of 222 degrees at .050” lift/97 degrees at .200” lift. Max Intake lift on cam .225” – Min .215”lift taken at the pushrod. Max Intake lift at the valve .238” Taken on valve spring retainer with zero lash. Max Exhaust lift on cam .232” – Min .222” lift taken at the pushrod. Max Exhaust Lift at the valve .242” Taken on valve spring retainer with zero lash.
(To achieve zero valve lash for checking running lift, preload dial indicator by .001”.)

Blower Housing Assembly: pull starter must be present and remain stock. Pull starter may be rotated for a better crank angle.

Header and Muffler Requirements:
Any single stage, one-piece header made from .750” OD steel tubing, with the RLV Mini B-91 Silencer installed at the end of pipe. The B-91 Silencer must be tread fitted to the pipe end. The entire exhaust pipe including the muffler is 15” max length and 10” min length. Exhaust Pipe must be double nutted or safety wired and silencer must be supported by clamped on brace to secure it in place. (No aftermarket coatings of any type are permitted.)

Fuel Tank Requirements: Floor Mounted fuel tank mandatory (stock tank must be removed). Pulse type fuel pump allowed.

Fuel Pump Requirements: Fuel pump must be pulsed from either the crank case or the valve cover. You may install a flat metal plate in the original tank location for the purpose of mounting the throttle linkage and fuel pump.

Clutches: Stamped steel drum shoe type clutches only, No machined Billet drums allowed. No disc clutches allowed.

RLV Mini 91 Silencer Requirements: Part #4117 Overall Length 5.470" minimum +/-.005" - 5.600" maximum +/-.005". Threaded Nipple .685" maximum ID (ID as Mfg. NO Grinding, Reaming, or Polishing Allowed). Rear baffle holes .1285" maximum, inner baffle holes .0965" maximum. Silencer must be utilized as produced, with no modifications or alterations permitted. Strap or brace required to silencer for support, and to insure silencer does not turn and unscrew.

Claimer Rule: You must finish the race in the box stock class to purchase the winners engine for $200
or $275 if the billet STEEL flywheel is included (minus the clutch/chain guard/throttle kit, header pipe/muffler, air filter adaptor/air filter, top plate & fuel pump).


Important Note: Any attempt to increase the RPM ’s of the BOX STOCK PROJECT, Stock Classes, engine(example: stronger/non stock valve springs or decreasing exhaust restriction from stock levels) is strictly prohibited. Should this be allowed or preformed will mandate the use of an aftermarket Billet style flywheel for high RPM use(Super Box).ARC currently has these parts in their product line(part #’s 6618/6619)and they are approved by AKRA for use, others may become available as demand increases. Note: Under no circumstances is this type of flywheel allowed in the Box Stock (Stock Classes),Stock Flywheel ONLY. No other alterations to or from stock components are allowed

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

 

 *************REMINDER ************

All clone classes must run pump gas(87 octane)

Animal Rules

**300 lb. weight rule (was 275 lb)

( Can run 2009 Sec. 718 IKF Briggs Gas Animal rules except: Animal must have compression relief cam, spec pipe and recoil must remain on engine! or you can run IKF, WKA or KART Stock Methanol Engine, or Clone engine rules)

**Animal header: 24 ” max length from header flange ( mount) to end of muffler or flare. Headers MUST be wrapped from 1” above flange to muffler or flare. ( safety issue)

** Header must be “J” style pipe only and MUST stay within the frame rails, muffler if used must be secured per IKF engine rules, header that exit outside the frame rails will not be allowed to compete. Header / muffler may not extend behind the rear bumper

** Gasoline only, 86-93 octane, no ethanol fuel or fuel additives allowed

** Clone engine allowed in Jr.Wing class:

** Engine per section 722 with the same THS changes as the JR1 class structure. No restrictor plate required

** MUST use billet ARC 6619 flywheel

** Header must stay within frame rails ( same as Animal engine) and must be wrapped

** Clutch is non-tech item

CHAIN GUARDS: Must have aluminum, steel or equivalent material chain guard by clutch and then extend chain guard with safe material to protect drivers arm. Must be secured properly to protect driver from broken chain.

  

OPEN CLASS

450 lbs

 

1.    Age limit:

a.     14 years and older

b.    All exceptions must be approved by Promoter.

 

2.    Motor: Any cc with a maximum 550cc. No big street type motors, i.e., 650, 750, 1100, etc. If in doubt, ask.

3.  single cylinder engines only.

 

ALL 390 Adult Clone Flat Karts

TIRES
.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.

ENGINE SPEC SHEET FOR BP 6.5 OHV CLASS
Description:
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.

No Porting of Heads

White Plate with Black Number visible on back of Kart  - or no scoring

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.

 

125cc CLASS  375 lbs

250cc 2/4 Stroke   420lb

1.    Age limit: 12 years and older

2.    A notarized minor release in mandatory. A new release is needed for every race season.

a.                   When parent/guardian is nit present at race event, a DESIGNATED GUARDIAN form is mandatory (for each race).

3.    Minors must be accompanied by an adult at all times while in the pit area. Parent/Guardian is responsible for the actions of their child. Bike riding in the pits is prohibited.

4.    Any parent/guardian or pit crew observed verbally or physically abusing other drivers may result in a fine and/or loss of points for their driver. NO EXCEPTIONS!

5.    No BIG BORE KITS not to exceed 135cc

 

125cc/250cc PROTEST RULES

 

1.    Motor may be protested for $50.00. This fee to be used for professional inspection.

a.                   If motor is found to be illegal, protestor may be reimbursed. This only if kart has winnings for that night.

b.                  Motor may be held up to 72 hours for inspection.

c.                   Drivers (125cc/250cc class) or parents of minor drivers are the only person eligible to protest.

d.                  Officials may spot check motors at any time.

2.    Illegal motors will be fined. First Offense: $250.00 fine, loss of points and earnings for that race. Third Offence- Kart and driver disqualified for the remaining race season.

3.    Parents/Guardians of minor drivers are responsible for fines assesses.

4.    All fines collected will be added to the 125/250 point fund.

 *************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.

 

 

********REMINDER ************

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

 

Class Motor Rules

Restrictor Box Stock         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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