2017 CLASS WEIGHTS

 

Young Gun Beginner 250
Jr 1 Clone 265
Jr 2 Clone 290
Jr 3 Clone 320
125 Outlaw 370
250 Outlaw 420
Open Outlaw 450
Flat RWYB ---
Flat Adult Clone 375
Adult Caged Clone 375
Flat Jr 1 Clone 250
Flat Jr 3 Clone 300


 

2017 AKRA RULES APPLY TO ALL CLASSES

 

 

GENERAL KART RULES

 

Frames

1. Frames and cages must be constructed of metal. No aluminum or conduit tubing.

2. All karts that are outfitted with rollcage be a minimum four-point either bolted or welded to frame.

3. Minimum of 3" head clearance to roll cage on karts with cages.

4. Minimum four-point seat belts bolted to frame or roll cage on caged karts.

5. Front and rear bumpers are required. Bumpers must be of tubular design. No flat style allowed. Maximum width of rear bumper may be no wider than tire sidewall to sidewall width. Maximum width of front bumper may be no wider than frame rails. Lowest rail of Bumpers may be no higher than 4" from ground.

6. Nerf bars are required. Nerf bars may not protrude past tire sidewall.

7. All karts must have adequate protection over driver’s feet. Full bodied hood, recommended.

Exhaust / Header Pipe

1. May use any type or style of open header. Except in Young Guns, Beginners, Jr. 1, Jr. 2,and Jr. 3 clone, spec pipe and muffler is required.

2. If exhaust end protrudes outside of kart frame or roll cage, must have flared or washer style end. No sharp edges.

Tires & Wheels

1. Any 5" or 6" diameter steel or aluminum wheels.

2. Any compound slick or treaded tire.

 

3. No turf tires allowed.

Brakes

1. Mechanical or Hydraulic disc is recommended. No scrubber style brakes. Must stop kart in a safe distance.

Fuel

1. Gasoline - No additives

2. Alcohol allowed in Gold Plate Animal, Stock Animal, and Modified classes only. No additives.

Numbers

1. Kart number must be displayed on both sides, front, and grandstand side of roll cage.

2. Numbers must be in contrasting color, so scorers can identify kart number.

Engine Kill Switches

1. Must have roll cage mounted on/off switch. Must be mounted in right rear area on roll cage with the ON position pointing forward or up.

2. Driver must be able to reach a second kill switch while seated and buckled in place.

Weights

1. All weights added to kart, must be bolted to point of attachment with adequate fastener.

2. All weights must be painted white, so they can be seen if they fall from kart onto track during race.

3. All weights must have kart number on them for identification.


 

PROCEDURES

 

Drivers Meeting

All drivers will attend a mandatory driver’s meeting. Local flag rules, starting procedure, yellow flag procedure, reentering the racetrack, lap traffic instructions and event schedule and safety issues will be discussed. The race director may elect to start any driver who misses the drivers meeting at the rear of heat and or feature event.

Crew chief / supervising adult must accompany Jr. racers to the drivers meeting.

Flags & Their Meanings and Race Calls

* Checkered Flag - the race is finished. Slow to a moderate pace for exiting the track. Proceed slowly to the scale and post tech area.

* White Flag - one lap to go in the race.

* Black Flag

 

  • Rolled & pointed: A warning about driver conduct
  • Waved (open) Black Flag: You must exit the track immediately because you have been disqualified for a driving infraction or unsportsmanlike conduct, unsafe equipment or loss of safety apparel.
  • If a participant ignores the black flag being displayed by the flagman, that person will be disqualified for that race.
  • Mechanical Black Flag in a feature could receive last place points at the Race Director’s discretion.


* Red Flag - the race has been temporarily halted. After slowing to a safe stop, drivers shall proceed safely to the start/finish line.
 

  • If the red flag occurs prior to the halfway point, the race may be restarted. Restarts will be in the same order as the last completed and scored green flag lap prior to the red flag.
  • If the red flag occurs at or after the halfway point, the race may score as a completed race and the results will reflect the last completed green flag lap. Karts involved in the incident will be scored at the rear of the field. The officials will make every effort for the event to finish under a green flag; however time and conditions may require the race to be scored as complete. Red flagged races will be declared official if the track officials decide the event cannot be completed. The race director will decide if your kart can restart the event.
  • Any kart or driver flipping over (turning over) causing a red flag will only be allowed to restart with the permission of the race director and the Emergency Medical Personnel’s approval. Any driver leaving the racetrack, due to an accident, by ambulance, will not be allowed to restart. Any driver causing a red flag may be subject to not restarting, as determined by the race director.


* Green Flag - Start; course is clear.
 

  • If you continue to block the progress of the faster karts, you may be black flagged and pulled off the course.
  • Slow car is to move to the top of the track to allow faster cars to pass on inside.


* Yellow Flag - there is danger on the course and there is a need for caution.
 

  • When a yellow flag is displayed anywhere on the track, it signifies a full course caution. Do not race back to the line on a yellow flag.
  • When the yellow flag is displayed, slow down. There will be no passing until the green flag is displayed again.
  • The leader will raise their hand so the field can reform in single file for the restart.


* Checker AND Black – When both flags are thrown this means that the race is under protest.

* Other Flag combinations may be used to signify half way mark, 2 laps to go, etc.


 

Post Race Technical Inspection

  • All finishers in the feature race must weigh in with kart and driver.
  • The Race Director or his appointed race official will decide how many karts will be impounded for technical inspection.
  • * The Technical Director will decide what and how much tech will be done in each class.
  • * Tech may be waived if the top five drivers unanimously consent.


Other

 

  • No Radio Communication between driver and pit crew will be permitted while driver is in kart.
  • No mirrors allowed on karts.
  • Beginners (1st time to race) will be required to start at the back for all races.
  • Kart teams are responsible for keeping their pit area free of litter and dangerous obstacles. (This includes cigarette butts too!)
  • All drivers must register prior to the race, you must sign in each night, and you must race the kart you sign in to receive points.
  • A driver must be able to demonstrate the required skills to enter a class, if requested to by the race director.
  • If the skills do not meet the class standard of the participants to race in a class, you may be asked to race in slower or less crowded class for safety.
  • Any driver racing in a higher level class in 3 or more events may not move back down to lower level class without petitioning race director. Example: you can't run Super Stock and then want to run in Kid Kart later. Running two classes is still allowed for experienced drivers. For example: such as Super Stock and Modified, or Modified and World Formula.
  • Classes may be added to race program if there are at least 4 karts registered. Race Director may combine classes if fewer than 3 in any given class are registered. (Combined classes will be scored separately.)
     

POINTS SYSTEM


Points are given to kart, not the driver.

 

A-Main Feature Finishes

1st Place 200 6th Place 150 11th Place 100 16th Place 50
2nd Place 190 7th Place 140 12th Place 90 17th Place 40
3rd Place 180 8th Place 130 13th Place 80 18th Place 30
4th Place 170 9th Place 120 14th Place 70 19th Place 20
5th Place 160 10th Place 110 15th Place 60 20th Place 10

 

  • Heat winners receive 10 points, 9 for second, 8 for third etc..
  • B-Main points start after last place A-Main. (Example: 12 karts in A-Main, 1st in B-Main receive 80 points.)
  • If you are disqualified or get a black flag for unsportsman conduct in your feature, you will forfeit any accumulated heat & feature points for the event.
  • To qualify for series end awards you must complete at least 75% of races.
  • All points will be cumulative through entire series.
  • In the feature a DNF (Did not finish) will get last place points. Kart must have entered track for feature to qualify for a DNF.
  • In the feature a DNS (Did not start) will still receive heat race points.
  • In the event of a rain out prior to completion of second heat being raced all registered drivers will receive 95 points. If both heats have been completed, points will be based on Feature Grid.
  • In the event of a series end tie in points, tie will be broken by the number of feature wins, second tie breaker will be the number of heat wins.


Heat and Procedures
 

  • Each driver will draw for heat races when they register for that day’s event. Registration closes when the scheduled Drivers Meeting begins.
  • If the driver is late and misses draw, that driver will start both heat race in last position.
  • The second Heat race line-up is the 1st Heat race inverted.
  • The Heat race finishes are added together to determine the Feature line-up. In the event of a tie, the driver with the lowest draw breaks tie.
  • The suggested maximum number of karts per heat is 8. When more than 8 karts have registered and drawn for a class, that class will be split into an A and B for both heats.


Heat Starts:
 

  • Flagman starts all races on the initial green flag. Green will be given when front row karts are keeping a reasonable pace and front karts are in line, and are approaching the start line at the same pace.
  • Any kart jumping the start twice may be placed at the back of the line up.
  • Flagman may call “No Start” if, at his discretion drivers did not make clean start.

 

In the event of a Yellow or Red flag:

 

  • The kart causing the caution will be sent to the rear and re-start will be based on the last completed lap.
  • If multiple karts are involved, Race Director may make all karts involved go to the rear.
  • If officials do not agree on a particular call (ie: who caused a caution), karts may be lined up for restart based on last lap completed.
  • Any kart stopped will be pushed to the middle or off the track. If this occurs during a caution, you will be allowed 1 pace lap to restart kart. Other wise if your kart stalls and is clear of track race will stay green.
  • You will only be allowed to restart kart twice during any given heat race, and only if it is during a caution. If your kart stalls during a caution that you did not cause driver will be given spot back on re-start, only if kart is restarted within the allotted time of that caution. If in restarting your kart it delays the re-start of the race you will be sent to the rear. This does not apply to beginners.
  • If you die in the shoot (prior to green flag) you will be given approximately 2 pace laps to start and enter track.
  • Any kart involved in or causing more than 2 cautions may be sent to pits.


Feature Race and Procedures
 

  • There will be a 20-minute time limit on all Feature Races, beginning when the chute gates are closed.
  • If the race stops for any reason after 20 minutes, the race will be called. The last completed lap will determine the Feature Finish.
  • Most Feature races will be 15 laps.
  • Parents and other kart representatives are NOT allowed on the infield during the racing program, unless authorized by the Race Director.
  • Anyone crossing the racetrack during a race is subject to disqualification of his or her kart for that race.


Feature Starts:
 

  • The Flagman will start all races with an initial green flag.
  • A Green flag will be given when the front row karts are keeping a reasonable pace, and front row karts are in line.
  • If all karts do not make a “clean start” to the “Start/Finish” line, a “NO START” may be called.
  • Any kart(s) jumping the start 2 times may be moved to the last place position, except in beginners.
  • If kart dies in the shoot (Before Gate), you have 2 pace laps to start your engine to keep position. After that time you will may be allowed on the track at the Race Director’s discretion and be moved to the last place position. The Race Director will determine if it is safe to enter the track.


In the event of a Yellow or Red flag:
 

  • The kart causing the caution will be sent to the rear and re-start will be based on the last completed lap.
  • If multiple karts are involved, Race Director may make all karts involved go to the rear.
  • If officials do not agree on a particular call (ie: who caused a caution), karts may be lined up for restart based on last lap completed.


Repairs


(You may not make repairs on the track. If you break you go to the repair WORK AREA designated prior to the race.)
 

  • Any kart stopped on the track during the race and causing a yellow flag will be required to push kart to Work Area designated prior to the feature race. You will be allowed REASONABLE time, ONE time (under yellow) to repair or restart your kart and enter back on track in the rear of the pack.
  • If you pull off the track for whatever reason, and the track is clear, the race will stay green. If you pull into infield the Flagman may throw a yellow at which time you will need to go to the WORK AREA.
  • Work Area repair during race is only allowed 1 time. In other words if you die or break and have already used your one repair window in the Work Area the second occurrence may cause your kart to be sent to the pits.
  • If break down occurs on or just prior to 4-5 laps to go, Flagman may continue race if track is clear.
  • Kart must pull off the track for a Black flag for safety/mechanical related issues. (ie: loosing neck collar, loosing bumper, etc.)


Protest and Engine Tech Rules/Procedures
 

  • At the Race Director’s and/or Track Owner’s discretion he or she may tech any kart including, but not limited to, motor, fuel, safety, etc. as they see fit.
  • All Competitor Protests must be submitted to the Race Director in writing within 15 minutes of completion of the heat race and/or prior to the beginning of the feature race that is being protested.
  • The competitor that is making the protest will also pay a $65.00 dollar “Protest Fee” in the event that they are protesting an engine. Thier engine will also be teched.
  • * In the event that the engine fails tech or the kart owner refuses to be teched, that kart and driver will forfeit any and all points for the entire season up to and including that eventt. Refusing tech a second time during any race series may result in being barred from the track.
  • * $25.00 from the Protest Fee will be paid to the engine tech, $40.00 goes to the engine being teched in the event that they are found to be legal and in compliance with the Slaton Speedway Rules and procedures, otherwise that $40.00 will be forfeited to the track.

KART MOTOR RULES

 

YOUNG GUN (Gas) Caged: 4-7 Years of Age Flat: 5-8 Years of Age

 

* This is a non-point class.

1. AKRA Restricted Clone. Must run 1-hole 0.281" red restrictor plate.

2. Restricted IKF/WKA Briggs & Stratton Animal. Must run 3-hole .220” Purple Horstman restrictor plate. Will be teched with .223" no/go. Restrictor must be mounted between Carburetor and Manifold. Restrictor may not be altered in any way. Must use gasket between restrictor and manifold.

3. Drum Style clutches only.

4. Clone must run AKRA spec pipe and Muffler.

5. Must have a 12 tooth driver and a 70 tooth sprocket.

 

 

*5-7 year olds must advance to Beginner class following competing in Young Gun class after 1 season, with the exception, if driver raced less than 50 % of actual race events for season, driver may choose to compete in Young Gun class the following year.

 

True Beginner (Gas) Caged: 6-12 Years of Age
Flat: 5-8 Years of Age

 

* This is a non-point class.

1. AKRA Restricted Clone. Must run 1-hole 0.281" red restrictor plate.
2. Restricted IKF/WKA Briggs & Stratton Animal. Must run 3-hole .220” Purple Horstman restrictor plate. Will be teched with .223" no/go. Restrictor must be mounted between Carburetor and Manifold. Restrictor may not be altered in any way. Must use gasket between restrictor and manifold.
3. Drum Style clutches only.
4. Clone must run AKRA spec pipe and Muffler.

5. Must have a 12 tooth driver and a 68 tooth sprocket.
 


JR-1 (Gas) / 7-10 Years of Age

1. AKRA Restricted Clone. Must run 1-hole .425" Green restrictor plate.
2. Any Style Clutches.
3. Must run AKRA Spec pipe and Muffler.



JR-2 / 8-12 Years of Age

1. AKRA Restricted Clone. Must run 1-hole .500" Purple restrictor plate.
2. Any Style Clutches.
3. Must run AKRA spec pipe and muffler.



JR.3 / 9-15 Years of Age

1. AKRA Restricted Clone- Must run 1-hole .550" Blue restrictor plate.
2. Any Style clutches.
3. Must run AKRA Spec pipe and Muffler.

 

 

JR. Outlaw / 9-15 Years of Age

1. AKRA Unrestricted Clone.
2. Any Style clutches.
3.Any exhaust pipe.

4. ALL added weight will be mounted to seat or around seat.
5. Outlaw style wing optional

 

 

Adult Caged Class / 15 Years and up

1. Hemi Only

2. Motor has to be stock

3. Any predator or clone 6.15 bored carb. (NO Honda carbs)

4. Can run weener pipe

5. Must run top plate and fuel pump

6. Can remove governor and low oil sensor

7. Must run stock untouched AirBoy

8. Must run stock air filter

9. Must run stock Cam that came in motor

10. Must run stock timing

11. Must run stock pull starter

12. 87 octane gas only

13. No Billet Fly wheels

14. Any Clutch

 

* Anyone racing class can claim any motor for $75 plus swap. Track car claim for $100. When claim, you get everything but topplate and clutch.

 

Pro Flat Predator / 15 Years and up

1. Hemi Only

2. Motor has to be stock

3. Any predator or clone 6.15 bored carb. (NO Honda carbs)

4. Can run weener pipe

5. Must run top plate and fuel pump

6. Can remove governor and low oil sensor

7. Must run stock untouched AirBoy

8. Must run stock air filter

9. Must run stock Cam that came in motor

10. Must run stock timing

11. Must run stock pull starter

12. 87 octane gas only

13. No Billet Fly wheels

14. Any Clutch

 

* Anyone racing class can claim any motor for $75 plus swap. Track car claim for $100. When claim, you get everything but topplate and clutch.

*All Predator engines must be brought to owner/promoter in factory sealed box.

 

ADULT FLAT KART MODIFIED CLONE

Age 15 years & up MinimumFuel: Pump Gas, Racing Gas, and Methanol AllowedClutch: Any steel drum, shoe-type clutch or disc clutch.Tires: OpenApproved Engine: Any Clone 6.5 OHV engine modified only according to the following rules:ENGINE SPECIFIC TECH:Cylinder Head Requirements: Stock Clone or Honda cylinder head only. Milling, porting,polishing allowed. Any size valve permitted.Bore and Stroke: Stroke must remain stock. Stock stroke is 2.123” +/-.005”. Stock Bore is2.685”. Max allowable bore is.020” over stock.Carburetor/Fuel System Requirements: GX200 or 6.5 HP Clone carburetor only. Norestrictions on modifications. Floor pan mounted fuel tank required (stock tank to be removed) andpulse type fuel pump allowed.Valve Train: Any combination of stock or after market rocker arms springs and retainers may be used. Camshaft Requirements: Max lift of .275” taken at the push rod. Ignition system: Clone ignition module only. No modifications of any type allowed. Piston Requirements: Must be stock dished piston or factory Honda ZOT flat top piston withno modifications. Piston CAN NOT ALLOW FOR ANY POP OUT! NO EXCEPTIONS!Connecting Rod: Stock or Billet aluminum rods allowed. Rod length is a non tech item.Crankshaft Requirements: NO STROKER CRANKS ALLOWED. Stock, factorycrankshaft only with stock, factory timing gear in factory location. Timing gear may be tack-welded tocrankshaft in 2 places to avoid slippage. No modifications to crankshaft allowed. Crankshaft Journaldiameter is 1.180”, 1.175” minimum.Block Requirements: Stock Block, as cast and produced with no alterations or modificationsother than those specifically permitted. Block head mating surface may be machined, however, no piston pop out is allowed.
Blocks may be welded for repairs as long as the repair does not constitute a functional modification tothe block. No welding to block from cooling fins upward to deck surface. Governor stub hole may betapped and plugged. 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.Flywheel: SFI certified billet flywheel only with no machining or alteration of any kind allowed.Any timing key or no key at all may be used. A flat washer may be used, and is recommended, betweenthe flywheel and the nut. Header Requirements: Any single stage or multi-stage, one-piece header allowed. Header maybe bent in any configuration to keep it away from the driver and so the end will not extend past the rearbumper.


**Tech Procedures & Guidelines for AKRA Clones**

ENGINE SPECIFIC TECH SHEET FOR: BOX STOCK 6.5 OHV

Description: Single cylinder, 2 valve, OHV 4 cycle engine.

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.* (*+/- 2 degrees for wear and gauge variances) 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.


**TECH PROCEDURES & GUIDELINES FOR ANIMAL CLASSES**

Cylinder blocks: (max. .030 bore) (piston pop up +.005" MAX).

Converted Inteks must run Animal head

Piston: stock Briggs pistons installed per. Manufacturers specs. (Arrow to mag. side, no machining)

Rings: Three rings are Mandatory. O marking must face up on 1st and 2nd ring. Oil ring must be installed as from factory. Rings must be self supporting in cylinder bore.

Rod: Any stock length rod can be used.

Crankshaft: Stock crank. (Stock dimensions)

Flywheel: Stock Jr. Racecar or Briggs PVL. (Stock magneto)

Cylinder head: Combustion chamber floor depth, no less than .319!

Combustion chamber squish band areas around plug and bottom portion of chamber no less than .011! (Will be measured with a quality depth gauge and will have 0 tolerances.)

Valves: Intake OD min. & max. 1.055 - 1.065, Exhaust OD min. & max. 935 - .945 Minimum Valve Length = 3.250" (1 angle, no polishing, stock keeper grove location)

Valve springs: Stock valve springs. (Or stock replacement to exact stock specs)

Camshafts: will be profiled out using a degree wheel with IKF profile. (Maximum cam lifts .257") (Gross valve lift will be teched @ valve spring retainer .255" maximum lift with no lash) ( Factory core camshafts only)

Lifters: stock replacement only.

Push Rods: Stock length. (5.638-5.656 minimum and maximum length)

Rocker Arms: Stock replacement only. (No alterations of any kind, comparison to a known stock part will be used)

Valve Cover: Stock valve cover with working stock baffle. No tapping or welding.

Carburetor: Items that drop from the bottom of carburetor with bowl off are not tech items:

Examples: main jet, pilot jet, float, needle and seat, emulsion tube.

Intake manifold: The only alteration allowed is slotting of holes for proper alignment.

Restrictor plate: Plates may not be altered in any way. No beveling of holes, either side. Plates will be checked with no-go gauge. Plates must be installed with tab on the right side.

Fuel pump pulse line: (top oil fill on side cover is the only allowed place)

Crank case ventilation: (from valve cover only)

Starter: Any type starter allowed.

Notes: These engine tech specs can be changed at any time per tracks updates.

All engine parts, except listed allowed changeable parts can be teched to a known stock Briggs Animal part.

Notes: This is a stock engine class and if anything is altered or replaced other than what is listed in this engine spec sheet it does not fit the mandated requirements. All Animal engines will be teched per IKF go/no-go gauges.


Gold Plate Animal (Gas or Alcohol) / 8-11 Years of Age

1. This is a Restricted IKF/WKA Briggs & Stratton Animal class. The only approved motor is the Briggs Animal OHV.
2. Must run 3-hole .312” Gold Horstman restrictor plate. Will be teched with .314" no/go. Restrictor must be mounted between Carburetor and Manifold. Restrictor may not be altered in any way. Must use gasket between restrictor and manifold.
3. May use any clutch (disc or drum)


Stock Animal (Gas or Alcohol) - / 10-16 Years of Age

1. This is a IKF/WKA Briggs & Stratton Animal Class. The only approved motor is the Briggs Animal OHV.
2. May use any clutch (disc or drum)


Modified Champ - / 12-17 Years of Age

1. 4 cycle 5.0 - 6.5 hp only
2. Approved motor types: B&S Animal/Intek, Tecumseh, Honda. Commercial type side shaft engines.
3. Must use production OEM block
4. Must use stock diameter size valves
5. Piston and rod are non-tech
6. Crankshaft must be OEM for that model engine. (stock stroke)
7. Camshaft max lift .310" lift @ pushrod for OHV and .420" lift for L-heads @ valves.
8. Head must be OEM head.
9. Grinding, porting, decking, and polishing allowed.
10. Must use Billet Flywheel or Briggs PVL
11. Gas or Alcohol. No additives.
12. Any carb. Will be teched with .900" no/go gauge. Stock appearing animal carb ok.
13. May use any exhaust header. Must have flared or washer end if exhaust protrudes outside frame.
14. Any clutch allowed.


125cc 2-Stroke

1. Single cylinder, two-cycle, single carburetor motorcycle dirt bike engine not to exceed 135cc displacement. Stock OEM Stroke. No slipper clutches.
2. Age 11-16. Younger drivers may petition to enter the class. It will be on an individual basis, with track promoter making final decision, based on experience and ability.
3. Right Rear tire must be Burris 55, Hoosier 50, or Rocketboy 55.


250F 4-Stroke

1. No overbore, some manufacturers have different cylinders A,B,C etc. As long as it falls within the parameters of OEM specs you are ok.
2. Stock stroke
3. No slipper clutches
4. No programmable ignitions, stock OEM only
5. No programmable EFI for fuel injected engines
6. Carb. or fuel injected is legal, single carb only
7. No porting, no welding of ports, no port angle changes, etc.
8. No lightening of flywheels
9. Gas only, race gas -ok no additives
10. Any pipe allowed as long as it is not a safety issue, (protruding outside of nerf bars etc.)
11. Gear removal will be a non-tech item
12. Tires -Right rear tire must be Burris 55, Hoosier 50, or Rocketboy 55 or equivelant.
13. Age 14 and up . Younger drivers may petition to enter the class. It will be on an individual basis, with track promoter making final decision, based on experience and ability

* The intensions of this class are to run the engines as they come off the bike, slight adjusts maybe made as more growth comes.


250cc 2-Stroke

1. Single cylinder, two-cycle, single carburetor motorcycle dirt bikeengine not to exceed 265cc displacement.Stock OEM Stroke. No slipper clutches.
2. Age 14 and up, younger drivers may petition to enter the class. It will be on an individual basis, with track promoter making final decision, based on experience and ability.
3. Right Rear tire must be Burris 55, Hoosier 50, or Rocketboy 55 or equivelant.


Open Outlaw

1. Single cylinder, single carburetor Two-cycle or Four-cycle motorcycle dirt bike engines are accepted.
2. Age 15 and up, younger drivers may petition to enter the class. It will be on an individual basis, with track promoter making final decision, based on experience and ability.
3. Right Rear tire must be Burris 55, Hoosier 50, or Rocketboy 55 or equivelant.

 

FLAT KARTS

 

Jr. 1

 

1. Ages 7-10

2. Briggs & Stratton stock 5 HP engine with .425 restrictor plate (purple)

3. Methanol fuel

4. No steering fairing

5. No tire rule

 

Jr. 3

 

1. Ages 12 to 15

2. Briggs & Stratton stock 5 hp engine with .575 restrictor

3. Methanol fuel

4. No steering fairing

5. No tire rule

 

Stock Medium

 

1. Ages 15 and older

2. Briggs & Stratton stock 5 HP engine. WKA engine rules.

3. Methanol fuel

4. No tire rule

 

PRO FLAT CLONE

 

2017 AKRA RULES APPLY

 

CHAMP KARTS

 

Jr. 1 Champ

 

1. Ages 8-10

2. Briggs & Stratton stock animal with a three hole restrictor plate with 0.225" holes(purple)

3. Methanol fuel

4. No tire rule

 

Jr. 2 Champ

 

1. Ages 10-12

2. Briggs & Stratton stock animal with a restrictor plate top hole 0.275" and a bottom hole of 0.325"(turquiose/blue)

3. Methanol fuel

4. No tire rule

 

(May combine clone caged karts and champ kart classes.)

 

* These are a list of the classes we will be running. Don't see your class, please feel free to call and we will work with drivers.

 

 

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