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World Formula

World Formula Rules


World Formula Karts are eligible to compete in the World Formula/SuperClone/L206 Class provided they meet the following rules.

Class age and weight

Ages 15+. Age as of Jan 1, 2019 is the age you are allowed for the 2019 season. Weight of kart and driver (as raced, including helmet, neck collar, and clothing) combined at end of each race is 380 LBS minimum as weighed on the ELKT scale.

Driver Equipment

  1. Helmet must be full faced with shield, in good condition, and designed for competitive motorsports.  No motocross style with goggles will be permitted.  A sticker on the inside of the helmet will indicate if it is of usable design
  2. Snell SA/K2005/M2005 minimum requirement.  A guide list can be found at http://www.smf.org/certlist/std_K2005
  3. Neck collar is mandatory
  4. Gloves full fingered design mandatory
  5. Chest and rib protector mandatory for 18 and under. Highly suggested but, not mandatory over the age of 18.
  6. Jacket made of abrasion resistant material Leather, cordura nylon (designed for kart racing) mandatory. Full kart racing suit recommended
  7. Nomex or Proban suits or jackets may be worn on top of or inside of a jacket or suit made for karting
  8. Full length pants mandatory
  9. Shoes mandatory no sandals, no open shoes
  10. No “on person” body weights, all add-on weights must be fastened to kart 

Safety / Kart numbering

  1. All add on weights must use a minimum 5/16” bolt and be double nut or single nut with cotter pin above the nut through the bolt. Weights must be painted white or be of bright chrome with kart number clearly readable
  2. All steering components / fasteners must be safety wired
  3. All brake components / fasteners must be safety wired and in working condition
  4. Snap rings on end of rear axle must be safety wired.
  5. Axle cannot extend past the rim face
  6. Gauges allowed
  7. Kart number, minimum of three clearly visible numbers from 30 foot distance. One on front nose bodywork and one on each side of side panels
  8. Fire extinguisher is highly recommended that each entrant have a minimum of one operable 1-1/2 pound dry-powder fire extinguisher (rated for use on A, B, & C. type fires) in their pit area. Carbon Dioxide type extinguishers are not acceptable substitutes for the dry-powder type.

World Formula Engine Rules

  1. Engine must be run stock, except for rebuild or freshening up. Stock means stock.  If you break a part or need to replace a part on your engine, it must be a stock (non-altered) Briggs & Stratton part for the World Formula.
  2. Carburetor: Stock PZ26. No alterations allowed.  Carb mount boot Briggs #557130 is required.  Slide must remain unaltered. Stock needle marked CDB is required.  Choke assembly is mandatory. Choke lever may be fastened open with spring, rubber band or tie wrap.
  3. Pilot jets: 36, 38, 40 are allowed.  Main jets: 90, 93, 96, 98, 100, 102 are allowed
  4. Exhaust header and silencer, factory header or RLV part number 5447S. Any exhaust gasket or no exhaust gasket allowed. Sealer allowed on header. Header nuts are not required to be safety wired. Bottom bracing must be bolted to head. Factory header may be cut and turned to fit car as long as the overall length and tube size remains the same as the stock factory header: OAL 20.5 OD .9375 x .065 wall (ID .807 +/-.005) exhaust gas temp sensor is optional.  RLV silencer #4108 required springs attaching silencer to header must be safety wired.  Header must have heat wrap installed at minimum from head flange to first bracing weld.
  5. Air filter must be Green brand 40 x 75.  No modification to filter. Outerwear is optional.
  6. Ignition timing – stock key – stock keyways
  7. Spark plug: any commercially available, 10 mm thread, spark plug allowed.  Indexing washers allowed. Removal of factory sealing washer is not allowed unless using head temp sensor in its place.
  8. Fuel pump must be B&S part 557033. Fuel pump must be pulsed from intake manifold only.
  9. Battery and Starter, not required, but must be added first before any other weights are added.
  10. Rev limiter: rev limit is 7100 rpm +/- 50 rpm. Rev limiter may be checked at any point in the race program. Rev limit will be checked with a suitable memory capable tachometer attached to the plug lead and the motor accelerated until the rev limiter begins to function. All rev limiters must function within 100 rpm when checked with the same instrument. Each competitor is allowed one courtesy check of the rev limiter with the instrument to be used at the event.
  11. Oil open.  No hot additives maybe added to oil.  Burn test can be used.
  12. Pump gas only – octane 87-93 suggested
  13. Rebuild Measurements:
    a. Piston no more than 0.03 over stock
    b. Piston pop-up – 0.025 maximum
    c. Head deck height – 0.319 minimum

World Formula Fuel 

  1. Pump gas or methanol only, no additives allowed. To be legal for methanol, driver and kart must be 20 pounds over class weight of 380 pounds on ELKT scale 

World Formula Clutch and Gearing  

  1. Clutch open, disc or shoe allowed
  2. Open Gearing

World Formula Tires and wheels

  1. Tires, MG 5” Red compound only, Purchased from ELKT.  450 or 550 fronts and either, 600 or 710 rears
  2. Wheel width size open
  3. 5" Rain Tires Mandatory during Rain Races.  Rain Tires NOT Required to be MG Tires

World Formula Bumpers and Bodywork

  1. Hoop bumper mandatory, a full hoop bumper mandatory.  Must cover at least 1/2 of both rear tires, must be round hooped ends that form one loop on outside.  CIK Style Full Size Plastic Bumper also legal.
  2. CIK Nose cone is Preferred, but Full Nose/Gold Cup Nose is also Legal.  Side panels or sidepods are required.
  3. Steering fairings securely fastened in safe manor on the steering column. Must have minimum distance of 3” from steering wheel to fairing beginning edge. Steering column fairing allowed if it does not interfere with drivers’ vision. Plexiglas not allowed
  4. Should any bodywork become loose, fall off, etc. during a race, it is at the race director’s discretion to allow continued racing or black flag the driver

World Formula Chassis

  1. Seat must be mounted in a safe manor.  From the back top of seat to ground no lower than 17″.  Back top edge of seat cannot be past the center line of the rear axle
  2. Max rear tread width 50″
  3. Working rear disc brakes mandatory
  4. Weights, painted white or chromed with kart number clearly readable.  A 5/16” minimum diameter bolt, must be securely fastened by either double nut or single nut and safety pinned. No loose weights allowed. Should a weight fall off the kart during a racing event, the kart / driver must meet the class weight, if not, forfeit of points for that race only applies

World Formula/SuperClone/L206 Class Points

Starting position is determined by a blind draw for the first heat.  Lowest number in the class drawn starts on pole for the first heat.  Then the starting order is inverted for the second heat.  For the feature the highest earned points for the day starts on the pole. If there is a point’s tie for feature starting positions the tie breaker is the draw for the day.  Low draw wins the position. Heats and feature 1st =10 pts 2nd = 9 pts, 3rd = 8, 4th = 7, 5th = 6, 6th = 5, 7th = 4, 8 = 3, 9 =2 and all positions after 9th get 1 point. Any points questionable by a competitor must be given in writing to a club official within the week between the questionable race and next point’s race. Request for points review will be reviewed before the start of the next point’s race. At the start of the next point’s race, all points will be final.

Tie Breaker: In the event of a Championship Tie, the tie breaker will be the driver with the most FEATURE race wins.  2nd & 3rd place FEATURE race finishes will also be considered as needed to break the end of year Tie.

Backup Karts: Backup Karts WILL be permitted in this class provided the driver who changed karts starts at the back of the grid for the day’s remaining races on his/her OWN ROW.

Rule(s) Violation Appeal

Should any competitor be found to have or be in violated any of the club or track rules, he or she shall have one appeal to club officers to review the violation. Club officers, consisting of president, vice president, and secretary will review the matter and will have the final decision to uphold or override / cancel the violation. Decision to be made within 2-3 days after written request for review from competitor.

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