WELCOME TO

                                   COUNTYLINE SPEEDWAY                

THE  #1  SOURCE  FOR KART RACING IN THE MIDWEST!

 

           HOME                   SCHEDULE                         RESULTS                   STANDINGS                       RULES

           NEWS                    PICTURES                          SPONSORS                     LINKS                        CONTACT CLS

__________________________________________________________________________________________________________________

 

RULES

 

Tentative Rules and Regulations for Track and Classes

County Line Speedway 2008

 

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 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 of a participant, spectator or official.

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

Drivers and parents of 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!

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

 

SAFETY:

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 seat. Lap seat 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 attacked to lap belt and worn below the elbow.

4. Helmets:   a. Snell or dot approved only.      b. Must fit drivers head.

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

    A. Seat mounts (1A.) Securely mounted to the frame.  (2A)  No excessive holes.

      (3A) Any suspended seat is to have safety cable attached to seat.

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

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

8. Kill switch is MANDATORY. Mounted on steering wheel or steering wheel post.

9. Minimum standard for roll cage (tubing thickness)  a. All classes’ 3/4 inch .083 chrome molly or 1 inch .06 chrome molly or 1" .083 steel. b. No exotic steel.

10 .Driving apparel:  Fire retardant apparel is MANDATORY if belted in. Go-karts may wear driving suit or jacket.

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

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

     a. Drivers body must be completely inside roll cage.

     b. Roll cage height minimum of 2 inch clearance above drivers head.

13. Fuel line location cannot be closer than 2 inches to any of the exhaust system at any time and shall not be above the exhaust. If closer than 2 inches, 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 fuel petcock area.

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.

17. Tail piece protection: If the top of the tail 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. PITMEN ARE NOT ALLOWED ON RACETRACK OR INFIELD WHILE RACE IS IN PROCESS. Violators will result in their kart being docked one lap or disqualification.

20.During a yellow flag, WORK ON KARTS ON RACETRACK IS ALLOWED.  Driver must take his\her place at the end of the field prior to restart.

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

22.  Any Official is permitted to remove karts from race track due to unsafe conditions to driver and /or other karts.

23.  Safety Committee and Track Officials decision are final!!

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

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

              A. Immediate must be fixed same day.

              B. Secondary must be fixed by following race date or pay $25.00 fine. Failure to fix items by third race will result in suspension of kart

IMMEDIATE                                                               SECONDARY

 

 

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 line.             

2. Yellow Flag: CAUTION.

       a. All karts must come to a parade lap speed. Failure to do so will result in being sent to the back of the pack. Single file formation.

3.  Red Flag: STOP AS SOON AS SAFELY POSSIBLE.

       a. Revert back to previous lap for lineup.  

       b. Red flag will not be used on the last lap.

       c. FAILURE TO OBSERVE THE RED FLAG WILL RESULT IN DISQUALIFICATION        

4.  Blue/Yellow Flag: MOVE OVER. To inform slower moving karts that leaders are about to pass. Move over WITH CAUTION.

 5.  Black Flag: PRECEDE TO PIT AREA for consultation. Kart will cease being                       scored from time flag is displayed.

 6.  White Flag: ONE LAP TO FINISH.

 7.  Checkered Flag: Race is officially over. All karts must pass under this flag to be scored.

 8.  If a Kart is stopped by an official, and has a MINOR safety problem on race track an Official can easily fix it, kart will resume position.

       a. If the kart is sent to the pits or work area and returns to track, kart will line up in rear of pack.

 9.  Jump starts will result in going tail back.

10. Drivers who are involved in or the cause of a yellow or red flag will start in the back of the pack. Three SPINS are in effect.

11. NO REFUNDS  issued once kart reaches track.

 

 

   UNSPORTSMANLIKE CONDUCT:

  1.  Fighting on premises will result in permanent suspension. Drivers are responsible for the actions 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 drivers will result in loss of accrued points for their driver and/or fine. NO EXCEPTIONS!

 

 

 

 ALL CLASSES:

1. Everyone MUST sign insurance release.

2. Frames must be of kart configuration. Not to exceed 90" in overall length. NO EXCEPTIONS. Kart not to exceed 350lbs. including full tank of gas.

3. Tires must be kart type only. Not to exceed 6" in diameter.

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

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

6. Uppermost part of kart and wing not to exceed 72".

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

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

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

10. Noise: a.) Must meet state noise levels. Karts in violation may not race until standards are met.  b). ALL KARTS MUST DISPLAY 10" NUMBERS ON RIGHT AND LEFT SIDE OF KART AND WING AND INSIDE LARGE WING PANEL. Numbers not legible will not be scored.

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

13. Numbers must be displayed on contrasting background.

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

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

16. All drivers under the age of 18 must provide a notarized minor's release. In addition, when parent or guardian is not in attendance, drivers must provide a designated guardian form.

 

 

 

PROTEST PROCEDURES

1. Motor may be protested for $75.00

   a. $50.00 is used for professional inspection.

   b. $25.00 is used for gasket kit (if motor is legal)

   c. If motor is illegal, protestor will be reimbursed up to $75.00

   d. Motor may be held up to 5 days for inspection.

   e. Drivers of CLASS or their parents are the only persons eligible for protest.

2. Illegal motors will be imposed a fine.

   a. First offense: $75.00 for professional inspection. Loss of points and earnings that night.

   b. Second offense: 200.00 fine loss of points and earnings for that night.

   c. Third offense: Kart and driver suspended for 2 weeks.

*  IF A KART IS FOUND TO BE ILLEGAL, THE DRIVER WILL LOSE ALL POINTS FOR THAT RACE AND WILL NOT BE ALLOWED TO UTILIZE THE "DROP LOWEST POINTS" RULE!!!!

* ALL PROTESTS MUST COME FROM A REGISTERED TEAM FROM THE SAME CLASS!!!!

* ALL DETERMINATION(S) MADE BY TRACK TECH OFFICIALS WILL BE FINAL!!!  NO DISCUSSION!!!!

 

 

 

CLASSES:

 

FLAT KARTS

Stock Adults:  K.A.R.T rules, weight 360#, body required. Age 15 & up.

Kids Stock:  KART rules, Weight 300# ,RED plate, Age 10-14 years as of  January 1st.

TIRE RULE:  Open to ANY brand of karting tire on the market

We have had several request for Jr. 1 Blue Plate class and Stock Med and Stock Heavy

To start the year we will leave the stock weight at 360# depending on kart count we will change to the medium and heavy weight.

****Must have 6 karts to run the class.*****

 

Must wear driver jacket (no Hooded Jackets or sweatshirts allowed).

1. Helmets (full faced helmets, Snell or Dot approved.

2. Gloves (racing type required in all classes).

3. Neck Collars (MANDATORY)

4. Numbers must be legible, prefer white or black, if using colored

NUMBERS:  Make sure they are legible or they won't be scored.  If more than one kart with same number, 2nd kart entered is responsible to add a number or letter to their kart.  Numbers need to be on both side and back of kart.

5. If signing in after line-ups are being made, you will start at the rear.  You are responsible for getting to the stage area when its your time to race, line-ups will be posted in 2 places throughout the track.

Race rules will be the same as our winged karts. (Refer to kart rules below)

NO RATCHET HUBS ALLOWED!


 

OPEN CLASS

1 .Age limit: Open-over 16 years old. All exceptions must be approved by promoter.

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

3. When parent/guardian is not present at race event, a DESIGNATED GUARDIAN form is mandatory (for each race.)

4. Weight Rules Open Class = 430 lbs

5. Motor:  NO MOTOR above 550cc allowed.  If you are unsure your motor is legal, PLEASE ASK!!!

6 . TIRE RULE:  Right rear tire QRC 5 or Rocket Boy 55.  RR tire must durometer at 55 or above!

7. No additives in fuel

 

 INTERMEDIATE CLASS (250cc/125cc):

1. Age limit:  over -12. All drivers must be approved by Promoter. Weight Rule 375 lbs.

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

3. When parent/guardian is not present at race event, a DESIGNATED GUARDIAN form is mandatory (for each race.)

4. 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/playing in the pits is prohibited.

5 .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!

6. Motor-125cc/250cc maximum.  250 MOTORS - Stroke limit =72mm     CC limit = 263cc

8. TIRE RULE:  Right rear QRC 5 / or Rocket Boy 55.  RR tire must durometer  at 55 or above!

9. No additives in fuel.

 

F200 OUTLAWS:

2008 F200 Dirt Series Rules

General Rules:

AGE LIMIT:  Minimum age limit: 12 years old     Maximum age limit:  18 years old

Any driver under the age of 12 must first seek approval of the track  promoter!

MINIMUM WHEELBASE:  40” to be measured center to center.

MINIMUM WEIGHT LIMIT:  360 lbs.  All lead on karts should be bolted to the kart, painted white, and kart number should be readable on EACH piece of lead!

TIRE RULE:  Burris Racing tires ONLY!!!

NO RATCHET REAR HUB!

F200 Technical Inspections:

9.1 Approved, commercially available, single cylinder air-cooled overhead valve engines.  200 cc's maximum displacement. See Chart for approved engines.

9.2 Block, Cylinder Head, Crankshaft and Side Cover: Must be approved OEM items.  Cylinder head, block and side cover external surfaces may be machined to remove excess material from mounting bosses, cast in brackets, etc that are no longer in use.  No external machining allowed to enhance performance.

9.3 Exhaust System: See rule 8.3

9.4 Carburetor: Any commercially available butterfly type Tillotson HL series carb. Minimum/maximum venturi diameter = .750/.790". Minimum/maximum throttle bore diameter = .990/1.010". Metering holes non-tech. Restrictor plates will be used in all Junior classes. See Section 8.8 for details. Filter cups, adapters and air filters non-tech items.  The carburetor pulse passage is non tech but can not be used to bypass the restrictor plate.  Its sole and intended purpose it to actuate the fuel pump inside the carburetor.  Pulse type fuel pumps permitted.

9.5 Fuel: See rule 8.1 and 8.1.2

9.6 Intake manifold: Aluminum only. Maximum mean inlet tract length is 2". Length determined by adding the longest and shortest tract distances (flange to flange) together and dividing by 2.

9.7 Connecting Rods: Aluminum only. (Fasteners and inserts/bushings excluded) Stock length (plus or minus .010") to be maintained. See chart for specific details.

9.8 Pistons: Any aluminum three ring (compression, scraper and oil and they must be present in grooves), flat top or dished piston. (No domed or pop up types) Rings and wrist pin non-tech but must be of steel (ferrous) material. OEM wrist pin diameter to be maintained.  See chart for maximum bore size and wrist pin diameter for a specific engine.

9.9 Crankshaft: Standard OEM item with stock stroke length (plus or minus .010"). Thermal treating and shot peening permitted. Minor grinding for camshaft clearance and welding cam gear to crank permitted. No other alterations allowed. See list for specific stroke details.

9.10 Flywheel and Ignition Coil: Aftermarket or OEM flywheels permitted. If OEM flywheel is used it must be unaltered and meet minimum listed weight the stock OEM coil (ignition system) must be used.  Approved aftermarket flywheels only may be used.  Spec diameter and weight as follows; 6.75" +/- .25"dia. X 4.75 lbs +/- .75 lbs. When using aftermarket flywheels, any approved OEM F200 coil may be used on any engine. (i.e. Briggs coil on a Honda, Tecumseh coil on a Kohler, etc) External coil modifications to facilitate mounting are legal. Coil mounts, flywheel key, spark plug boots and plug wires are non tech items. See below for approved flywheels.

9.11 Cylinder Head: Original factory casting only. Two valves maximum and must maintain original location, (angles are 90Ί from deck with listed spacing). Carb inlet and exhaust outlet in the head have to be in their stock intended locations. Porting and grinding permitted.  No external addition of metal to enhance performance allowed. Spark plug to be 14mm X .75 reach only and original stock location maintained. Minimum combustion chamber volume when mounted on engine @ TDC is 24 cc's using prescribed procedure as noted in rule 8.5. This is to be done after the event and when the engine has cooled down to a reasonable temperature. (Note – Briggs W/F head legal but mustuse a 14mm spark plug)

9.11.1 Cylinder head repair. Aside from the above, each engine brand will be allowed an approved area on the inlet and exhaust tracts for external repair of broken through "thin cross sections" during the porting process if deemed necessary.  The area shall be no greater than a .63" (16 mm) square and either epoxy or welding is acceptable.  This repair has to be confined to the "approved" area shown on the list below.

9.12 Valve Train: Push rods, push rod guide plates, retainers, springs, keepers, rocker adjusters, etc, non tech. Steel valves, springs and push rods only. Retainers may be of aluminum or steel. Intake valve diameter, 1.080" maximum, exhaust valve, .990" maximum with a minimum stem diameter of .188" (4.77mm). Stock OEM rocker arms only (with no alterations to their stock ratio). No interchange of rocker arms between engine brands. Stock (Briggs) OEM cylinder head plates only. Rocker arms and (Briggs) cylinder head plates may be welded or reinforced for strength. No other alterations to original configuration permitted. Flat tappets only, must be stock appearing. Unless otherwise specified no titanium components allowed.

9.13 Camshaft: Maximum (actual running) lift .275" measured at valve retainer. This is to be done after the event and when the engine has cooled down to a reasonable temperature.  Note – If the camshaft has a compression release it needs to be taken into account when zeroing the indicator on the exhaust lobe. Cam and crank gear non-tech.

9.14 Fasteners: Non-tech, but must remain in original location. Heli-coils, studs, etc allowed.

9.15 Gaskets: Non-tech.

9.16 Lubrication system: Must retain splash type oiling system.

9.17 Bearings: All ball and roller bearings shall be of metallic (magnetic steel) construction (excluding retainers) and be of conventional design. This includes inner and outer races as well as the balls and rollers. No other materials allowed.

9.18 Coatings: Wear type coatings allowed on valve train, valves, camshaft, wrist pin, rod and crankshaft only. Coatings of any type not allowed on block, head, piston, or side cover.

9.19 Crankcase breathers are to be routed internally through the valve cover as originally intended in OEM configuration. No additional breathers allowed.

9.20 Approved flywheels are the ARC models 6606, 6608, 6613 (w/starter ring gear), 6614 and the UMMF model FA-100 and the FS-1001. Briggs Animal flywheel (JR Racecar type pt #699305) (Note - Due to the unknown performance and reliability of the Briggs PVL ignition, and the effect it would have on all currently approved F200 engines, it is not allowed at this time.)

9.21 Tires: See Section 4.1 for Oval specifications and 4.50 for Sprint

9.22 New engines are to be submitted by the manufacturer (or its authorized representative) for approval no later than October 1st to be eligible for the following competition year.  Major OEM components (blocks, heads, cranks, side covers, etc) may be submitted quarterly (Jan, April, July, Oct) by the manufacture (or its authorized representative) at any time and must be available to the public for not less than 90 days after their approval before being legal for competition. Note - Approval is not automatic and is up to the discretion of the BNSS.                         

 

2008 CLS KART RULES (ROOKIE, BEGINNER OUTLAW, and MODIFIED OUTLAWS):     NO CHANGES FROM 2007!!

A. Classes Age limit:   a. Rookie Outlaws: must be 5 (Black .375 plate-235 weight)

     b. Beginner Outlaws: 6 to 8 (All exceptions must be approved by promoter.)(.425 restrictor plate 245 weight)  c. Outlaws: 8 to 13 (All exceptions must be approved by promoter) (un-restricted-275 weight)  

TIRE RULE:   Hoosier Racing tires ONLY!!!                                                                                                                                    

1. A NOTARIZED MINOR RELEASE IS MANDATORY. A new release for every race season.

     a. In addition, when parent or guardian is not present at race event, a DESIGNATED GUARDIAN form is mandatory. One for each race.

3. 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.

4. 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!

B. STOCK BRIGGS & STRATTON ENGINE RULES:

Technical Inspection Procedure

Engine No's 130202, 130232, 131232, 132232,133230,133232,135230 & 135232

UNLESS OTHERWISE SPECIFIED. ALL PARTS ARE TO BE STOCK AND UNALTERED.

PARTS MAY BE TECHED AGAINST A KNOWN STOCK PART. DO NOT ASSUME ANY

ITEM IS LEGAL BECAUSE SPECIFIC REFERENCE IS NOT MADE IN THE "TECH

MANUAL."   ASK YOUR TECH OFFICIAL.  HE WILL OBTAIN AN OFFICIAL ANSWER

1.  Any after market fastener may be used except for rod bolts, head bolts and carb butterfly.  Repairing of stripped bolt holes allowed but stock size and location must be retained. Gasket surfaces may be machined, stock angles must be maintained. Excessive removal of material not allowed. Aftermarket gaskets and diaphragms may be used as long as they remain the same dimensions.

2. Engine may be run with or without a air filter. If a filter is used it must be used with a legal adapter. Filter may not act as a ram tube. Sides of filter may not be of less dense material that top. May use two gaskets between carb. and air filter adapter. Silicon or O-ring permitted.

3. Exhaust pipe may not protrude into block. Holes other than for thermocouple not permitted.

4. All shrouds and coil air vane must be used. Flywheel screen must be on flywheel or shroud. Cutting shroud for tire clearance allowed.

5. Recoil may or may not be used. Stock ratchet, starter cup or after market starter nut allowed. Ratchet end of crank may be removed.

6. Briggs magnetron ignition only. Coil 2,000 ohms minimum, 5,000 ohms maximum. Any plug connector allowed but must be included in ohms check. Silicone may be used on low tension wires.

7. Tank may have one or two gaskets installed. Clearancing for tire, repairing and bracing allowed. Fuel cap must be one with a check valve in it.

8. CARB

 a. Flange may use one or two gaskets. With the .696 No-Go in the back side of the carb, it cannot hit the butterfly when open. No sealers anywhere other than end plug, pickup tube and as sealer between air filter adapter and carb.

 b. Swirl may be removed.

 c. Bore .695" maximum inside dimension includes the entire length of the carburetor bore.  Metering hole protrusions not permitted. Counter bore .726" no-go only.

 d. Throttle shaft .086" minimum at back, .040" at front. Stock butterfly screw mandatory.   Minimum length of screw is .322”. New Torx screw may be used. No modification to   butterfly. Where butterfly mates with throttle shaft, it shall have a minimum dimension of   .058" and of .101" at back of ramp thickest point. Felt or foam washer must be on carb shaft under lever.

 e. Choke may be removed and holes plugged. Plugging material may not enter carb bore.   If choke is installed it must be stock. New style carbs from factory have no choke holes.

 f. Jet may have remote tuner. Jet must be installed as from factory. Hole size in jet non-tech. No recessing of hole permitted from back side. No funneling or oblinging of hole permitted.

 g. Idle hole .028" no-go. High speed hole .062" no-go. Straight round holes only. No tapered or oblong holes allowed.

 h. Pickup tube screens optional and non-tech. I.D.066” no-go for short tube steel winding.  No-Go cannot pass completely through tube when checked from either end.

 i. Maximum air horn inlet 1.011”. No machining allowed.

 j. Aftermarket device to repair broken ear on carb permitted.

9. Aftermarket head gaskets of same size and material permitted. Minimum thickness .043” checked halfway between holes. No sealers or coatings.

10. Head must check .011”, .408”, .300” minimum; .315 maximum. Soft carbon may be wiped with rag before checking. Hard carbon may not be removed. Only headbolt mating surface and gasket surface may be machined. Glass beading or sanding for carbon removal only. Head bolt holes .348” no-go.

11. Maximum piston pop out at wrist pin centerline .015”. Deck must remain above valve seat.

12. Maximum bore 2.607”. Inspect deck for reworking of eyebrow area.

13. Stroke 2.4270” to 2.4470”

14. 30 degree, one angle intake valve, minimum diameter 1.115”. 45 degree, one angle exhaust valve, minimum diameter .990”. Minimum edge margin .025”. IC block must run cool bore exhaust valve, spring and retainer.

15. May use Intake or Exhaust spring on intake valve. Must use Exhaust spring on exhaust. Maximum length 1.500”. Maximum wire diameter .092. Minimum inside diameter .625”.

16. 30 degree, on angle, valve seat diameter no-go. 1.005” intake. 45 degree, one angle, .880” exhaust. Inlet port .880” no-go. Exhaust outlet 1.005” no-go. No-go check to be made at intake port inlet and exhaust port outlet. Port area surface and finish are non-tech, but there can be no addition of any material. Valve seat inserts must remain unaltered.

17. Any upper spring retainer allowed. .058” maximum thick-ness. Upper part of valve spring chamber may be machined to prevent coil bind.

18. Stacking of stock valve guides and one-piece guided allowed, installed as factory intended.

19. Flywheel may not be altered in any way. No broken fins or painting allowed. Minimum flywheel weight 5lbs. 12oz.

20. CAM PROFILE

Zero degree wheel with position piston stop.

Exhaust Intake

.050----------(38-33 BBDC)       .050------------(7 DTDC – 0 TDC)

.100---------- (21 - 16 BBDC)    .100--------------- (10 – 17 ATDC)

.150---(2 BBDC – 3 ABDC)     .150---------------(29 – 36 ATDC)

.200 ----------(21 – 31ABDC)     .200 --------------(55 – 64 ATDC)

Max.------------------- (.233”)      max.------------------------ (.233”)

.200-----------(76 – 65 BTDC)    .200---------------(43 – 33 BBDC)

.150 ---------(48 – 40 BTDC)     .150-------------- (13 – 6 ABDC)

.100 ----------(28 – 21 BTDC)    .100 -------------- (6 – 13 ABDC)

.050------------ (10 – 4 BTDC)    .050 ---------------(23 – 31 ABDC)

E-Z Start------ (45 – 60 ABDC)    E-Z Lift---------(.013" minimum)

E-Z Lift----- (.019" maximum)   E-Z Duration (30 degree minimum at .001" drop

Note: All cam profile readings must be taken with zero valve lash. When checking cam profile, rotate engine in the direction it runs only. (Valves should have no clearance and no spring tension when checked.)

21. Multiple side plate gaskets allowed. Center punching of gasket surface allowed.

22. Cam has no visual check on the lifter surface. Cam block boss O.D. and finish are non-tech.

23. Lifters O.D. .982" minimum, 1.005: maximum. 1.606" maximum overall length. Champhering at bottom of lifter bore for clearance purposes only. Max I.D. of chamber is .500. (the intent of this is not to back face lifter bore area.) Billet lifters permitted. Check to stock dimensions.

24. Rod bolt lock, washers and dipper are non-tech and optional. Stock rod bolts must be used. The dipper area only of the Raptor II 55207 rod is non-tech. Oil hole size Non-tech. No .020" undersize rods dimensions.

25. Any unmodified, series produced aluminum alloy rod that is available to the karting industry is allowed. Rods other that the Briggs factory rod may be no lighter than 135 grams with bolts and inserts, if used. Rod length, from bottom of wrist pin hole to top of crank hole must measure between 3.120" and 3.143".

26. Wrist pin. Maximum I.D .290: Maximum O.D .490" Raptor III wrist pin I.D .281 Max., O.D .490, Length 1.731 +/- .005.

27. Piston. Minimum length 1.869" Minimum top of wrist pin to top of piston. .937". IC engines may run IC or cool bore piston. Raptor III piston allowed, arrow facing coil or PTO. Piston length 1.672 + or - .005. Top of piston hole to top of piston .937 + or - .005.

a. Raptor III ring .090 min. width, . 058 + or - .005 thickness.

b. Raptor III oil ring .070 min. width, .100 + or - .005 thickness.

28. Stock type cool bore rings only. No IC rings allowed. Machining back side of rings allowed.

a. Top groove – compression ring installed. Minimum width: .095". (No chrome ring or expander under ring.) May or may mot have bevel.

b. Middle groove – oil scraper ring installed with outside scraper groove down. Minimum width .095". (No expander under ring.)

c. Bottom groove – one piece oil ring installed either way, and no three piece or four piece oil ring from chrome set allowed. Minimum width .085".

29. Heat treating of stock crankshafts legal. Bushing type PTO journal crankshaft may be turned down to allow the use of bearing. Cam gear must be in place on an unaltered key.

30. Stock Briggs bushing #399268 or #297565 may be installed on flywheel side. Inspect block for alterations and reworking. Blocks welded for broken rods are legal if not used to disguise modifications. Minor welding to lower exhaust bolt hole is allowed for repair (weld cannot protrude into exhaust port). Reinforcement or repair of lifter boss area is allowed. Installation of bushing guide to help reinforce lifter bore area allowed. Removal of governor mandatory. PEER 6205-14 or equivalent 9 ball, steel separator, ball bearing allowed on flywheel side of ball bearing cranks. This bearing is used without sleeve. Extra .125" hole may be added on flywheel side of block for better bearing lubrication. After-market PTO bearing of non self-aligning type, with or without shields, is permitted. No ceramic bearings allowed.

31. Check valve seat heights 5.485: minimum/ 5.520" maximum. Install a .500: rod in place of cam and replace side cover. Measure though the valve guide from top edge intake or exhaust valve seat. Lifter bore and valve guide bore must accept seat height gauge rod.

Header or Muffler

1. Header or muffler must extend beyond fuel tank, but not to extend past rear bumper. Minimum 1.990" washer or flange mandatory on pipe end. No sharp edges. Washer thickness. 075" minimum.

2. Exhaust header end or muffler may not protrude inside of port.

3. Header support allowed. Bracket to support header or muffler allowed. Bracket may not be secured under more that 4 head bolts.

4. Must be fixed position pipe. No "slippy" pipe.

5. No extra tubes to, in or through header allowed.

6. Hole for exhaust thermocouple allowed. Thermocouple must be in place.

7. Loop pipe must be heat wrapped for safety.

8. Header and Mufflers will be required on all 4-cycle engines. RLV B-91 on all stock motors. Block savers/ exhaust rotator allowed.

9. Bolt or studs securing header must be safety wired. Muffler must be safety wired through a hole in the header brace and perforations on end of the muffler. Do not weld on or drill holes in the muffler.

Fuel and OIL

1. Any competitor spilling oil or fuel on the track will be subject to suspension.

2. 100% Methanol in all classes NO ADDITIVES

3. Fuel may be pumped around or tested by any means available to KART officials. Violators may be suspended.

4. Crankcase content are subject to test, at any time, for dangerous, oxygen bearing or flammable vapor producing substances, which are prohibited.

5. Flame test procedure is as follows:

a. Drain about 1 fl. Oz. of crankcase oil into a large steel spoon or ladle

b. Apply heat to the bottom of spoon with propane torch while checking the surface temperature of the oil with an infrared temperature gun.

c. When the oil temperature is between 250 and 300 degrees maximum, pass the flame 3 times over the oil approximately 1-inch above the surface. Do not touch the flame to the surface of the oil.

d. If the oil ignites and continues to burn when the flame is removed, it is illegal. If the oil flashes and the flame goes out immediately when the torch is removed, the oil is legal. Modifications of the method are acceptable if the following points are observed: Oil temp never exceeds 300 F. The flame source does not torch the surface of the oil. Continued burning of the oil is necessary for illegality.

 

 

 

SPECIAL RULES

1. No pressure tank in any classes.

2. Oil catch container overflows are mandatory in all 4-cycle classes. Overflow system subject to tech.

3. Tach and temp gauges are subject to tech inspection and are legal in all classes

4. No sealer or paint may be used on any gasket or sealing service. Sealer may be used as an exhaust gasket in all classes.

5. Engine will be teched the day it is raced.

6. Carb saver brackets allowed. If head to carb type is used, the bracket and/or filter adapter must remain lower than the top edge of the carb inlet (type A adapter). Bracket may not alter tech dimensions (type B adapter).

7. Engines may be checked for air leaks.

8. There is no tech on the quantity of holes in the flywheel screen but if there are holes they cannot be uncovered at any time during the race.