Rules & Regulations 2024

Please refer to IKF rules manual for more specific rules and regulations
Specific Engine related rules refer to Briggs and Stratton or national body engine specifications
All Rules listed below override IKF Rules

Cost

  • Race Day:
    Weekend Races:  $60 Single Day, $100 Double Header

    Sportsman Races:  $40

    Additional Class Entry:  $20 Single Day, $40 Double Header

    Daily Practice:  $40

    Friday Practice on Race Weekend:  $30

    Pit Pass: $10 Single Day 

    Double Header Pit Pass (Friday/Saturday/Sunday): $20 

    Transponder Rental: $10

    NOTE: The Spud Cup will have special pricing that will be announced separately

  • Anyone wishing to race or enter the pit area will be required to purchase a wrist band at registration.
  • Anyone under the age of 18 will be required to have a parental consent form signed before entering the pit area.

Safety

  • Please refer to the IKF rule book for requirements on Safety Items.
  • These will be strictly enforced throughout the year and a driver may be disqualified from the event if they do not adhere to the safety requirements.
  • This goes for personal safety as well as kart chassis safety requirements.

Protests

  • Protests must be written out and turned in to scoring or to the tech official and must be turned in within 30 min. of the completed race or session. They must include the rule or the issue.
  • The final say will be by the race director and any protest may not being finalized or have a determination until after the end the event.

Flags

  • Green – to start the race.
  • Yellow – means that there is an incident and to procede with caution. There will be no passing allowed in the yellow area.
  • Black Rolled – means a warning for how you are driving and it is your final chance to fix it.
  • Waving Black – means you must leave the racing surface for either mechanical failure or detrimental driving.
  • Blue with Orange stripe – means the leaders are approaching and you are to allow them to pass and not race them. 
  • Red – means come to a slow, safe stop on the track.
  • White – means one lap to go.
  • Checkered – means the end of the race and you are to proceed to pit road at caution speed.

Numbers

  • Numbers will be first come first serve and will be given to those participants who are competing full time. Practice Pass holders will receive first pick in numbers.
  • If a number has not been used then the first person to use that number will receive priority. Any additional drivers using a already claimed number must either change their number or add a letter.
  • The Driver with their number from the previous year must make it known by the first race of the season if they wish to retain their number.
  • If a driver moves up a class and a driver in that class already has claim of that number they must choose a new number or add a letter.
  • All rookies must have an X on the back of their helmet or across the rear number plate. This will be required for a minimum of that drivers first three races.
  • All competitors must have numbers displayed on all four sides of the kart and the numbers must be clearly discernable. This will be in the judgement of the race officials.

Race Formats

  • Standard Format –
    • Will consist of five sessions
    • Practice, Practice, Qualifying, Heat Race, Main
    • Qualifying will determine the starting order of the heat race going fastest to slowest
    • The main event starting lineup will be determined by the finishing order of the heat race
  • Dual Heat Format –
    • Will consist of five sessions
    • Practice, Practice, Heat Race, Heat Race, Main
    • The first heat race starting lineup will determined by random draw
    • The second heat race will be a complete invert from the first heat race starting lineup
    • The main starting lineup will be determined by the lowest score from the two heats. (1st in a heat = 1 point) Tie breakers will be determined by fastest lap from the two heats.
  • Double Main Format –
    • Will consist of five sessions
    • Practice, Practice, Qualifying, Main, Main
    • The first main starting lineup will be set by the drivers fastest qualifying time.
    • The second main starting lineup will be set by the drivers second fastest qualifying time.
    • Each main will be ran as a separate points race.
  • SPUDCUP Format - 
    • Club Race Version
    • Will only be ran with 4 stroke classes
    • Will consist of six sessions
    • Practice, Practice, Qualifying, Heat Race, Heat Race, Main
    • Practice, Qualifying, and Heats will be shorter than normal format lengths
    • First Heat Race starting lineup will be determined by Qualifying
    • Second Heat Race starting lineup will be determined by finishing order of First Heat Race
    • Main starting lineup will be determined by the combined score of the first two heat races with Qualifying being the tie breaker
    • Point system is 0 points for 1st, 2 for 2nd, 3 for 3rd, and so on meaning low score wins.
  • B Main –
    • Will be at minimum 75% of the A main race distance rounded down. (Example 75% of 14 lap main is 10.5 so B main would be 10 laps)
    • Will only be ran if there are more than 28 karts in a class.
    • If a B main is required the structure and format for that class will be discussed during the drivers meeting
    • If you miss the drivers meeting and your class requires a B main you will automatically start last in the B main
  • NOTE: Rookies will be required to start last in all heat races regardless of format. (first three races) All formats will be able to be adjusted at the race director’s discretion but must be announced and made clear at the drivers meeting.

Race Procedures & On Track Activity

  • Starts:
    • All classes will be rolling starts double file
    • The flagger will start the race.
    • Pace will be a nice even slow pace dictated by the leader.
    • Second shall not be in front of the leader.
    • Drivers may not lay back and break out of formation to gain an advantage before the race has started. Drivers may not go outside the starting lanes until the green flag has been displayed.
    • Drivers will be given one warmup lap (one pass by the start finish line) and then must begin lining up for race
    • Sportsman class may be given two warmup laps based upon conditions
    • If a kart joins late, they will not be entitled to a warmup lap but may still start in their original starting spot
    • If a driver spins or for any reason slows on warmup laps they may attempt to rejoin in their original position. If they are unable to do so they will start at the rear and their row will move forward.
    • If a driver misses the start they may still come on track until the field has taken the green to which they will be scored as a DNS.
    • If a driver doesn't make the start the row the driver is in will simply move forward.
    • Penalty of note is a jumped start. If either of the front row drivers jump the start, they will be subject to a position/time penalty or will have the opportunity to give the spot back. A jumped start is where a driver has gained an unfair advantage on his fellow front row competitor. 
  • Restarts:
    • A restart will be signaled by a waiving yellow and red flag
    • A restart will only occur if the race director or main flagger deem it necessary
    • If a restart is determined due to an on-track incident, all drivers will line up as they were originally with all drivers involved to the rear in order of how they would have originally started. 
  • Red Flag Restarts
    • Will be single file restarts.
    • Lineup will be determined by the previous completed laps running order. This means the last completed lap by the full field.
    • The leader will accelerate at an acceleration line
    • No drivers are allowed to make a pass until they exit turn three
    • Once the field has exited turn three the track is fully green
    • If the red flag is thrown during lap one there will be a full restart with karts involved in red flag incident starting in the back if they are able to continue.
  • Exiting The Track
    • When exiting the track at any time a driver is required to raise their hand to allow other drivers to be aware they are slowing and leaving the track. Failure to do so can lead to penalties. The place to do this is down the main straight not after.
    • If you are off the track and cannot continue let officials nearby know and make your way safely away from the racing surface. You must also remove your kart from the area next to the track when it is safe to do so. Do not attempt to return to the pit area until the conclusion of the race. All junior drivers are to remain in their karts until track personnel arrive.
    • SR drivers may help themselves and continue in the race. JR drivers may receive help from officials. Drivers can only bring their karts back to the track in safe conditions, not doing so will result in a Black Flag.

Points

Please refer to the Points Format page for points breakdown

  • Points tie breakers
    • 1. Most wins
    • 2. Most Poles
    • 3. Highest finisher in Championship race main

Class Structure / General Rules

  • All Classes
    • Rear bumper must extend at minimum halfway covering the rear tires on each side and no farther than one inch beyond rear tires if they are on 6 inch rims. 7 inch rims bumper cannot extend beyond the outside part of the tire.
    •  Transponders must be a minimum of 12 inches behind the top of the centerline of the left king pin to the front edge of the transponder.
    • Transponders must be used in all official sessions. THIS INCLUDES PRACTICE.
    • An RLV-B91 muffler is required for all LO206 classes
    • RLV Silencer #4108 is required for World Formula
    • Mufflers must be safety wired to header or header bracket
    • Mufflers can be inspected at any time to determine safety and that they are secure
    • Header bolts shall be drilled and safety wired
    • If you move up from a junior class to a higher aged class you may not return to that original class. This applies even if this is done at another track.
    •  Weight: If you are under the weight limit you get one reweigh, if you are still under you go to last place for the race. There will be a one pound grace zone for all classes so if you come in 1 pound under your classes minimum weight you still pass.
    • If at any point a competitor gets up out of their seat they are done for that session. THIS INCLUDES WARMUP LAPS.
    • If a competitor fails an engine tech item they will be given a 20 min. cool down period. This only applies to engine tech items and will only be utilized after main events.
    • If anyone outside of the tech official touches an item without permission or direction from the tech official that competitor is automatically disqualified.
    • Only the driver, ONE team member, and the engine builder of the motor may be present in tech.
    • Max width for Junior/Senior classes 55 1/8"
    • Max width for Junior 1 level classes 50"
    • Fuel for our non-ethanol pump gas classes can be purchased at Chevron 10 min. from the track in Emmett.  This is the fuel used by the track.
    • NO STARTING ENGINES OUTSIDE OF PIT ROAD. THIS MEANS NO ENGINES RUNNING IN YOUR PITS, NO EXCEPTIONS. WE WILL HAVE A DESIGNATED PLACE OFF OF PIT ROAD FOR YOU TO START YOUR ENGINE IF NEED BE.
    • ALL 2 STOKE KARTS MUST HAVE ADDITIONAL SILENCERS TO BE ABLE TO PRACTICE AT KART IDAHO. THIS IS A ZERO TOLERANCE POLICY.
    • JR1 107% Rule - All drivers before moving up from Novice to JR1 must be able to run at a pace within 107% of the leaders times or must receive special track permission to move up.
    • Junior Classes - Due to the wide variance of abilities we will black flag lapped traffic to prevent wrecks and potential injuries. Senior Classes will still have lapped traffic but that may change at the discretion of race officials.
    • HARBOR FREIGHT GHOST 2024 UPDATE - ALL ENGINES MUST REMAIN IN STOCK MAKEUP. EXTERIOR KITS ALLOWED (HARBOR FRIEGHT OR RLV). NO MODIFICATION OF PIPES IN ANY WAY IS ALLOWED. SWAPPING THE CARBURETOR FOR A BRIGGS CARBURETOR IS ALLOWED. AT ANY POINT KART IDAHO OFFICIALS MAY CONFISCATE A HF GHOST ENGINE AND PROVIDE A NEW ONE TO THAT COMPETITOR AS LONG AS THE CONFISCATED ENGINE IS LEGAL AND HAS NOT BEEN TAMPERED WITH.
  • Class Size
    • The maximum amount of karts allowed on track at one time is 28.
    • If a class’ kart count exceeds 28 karts then all practices, qualifying, and heats will be split.
    • The class will be then required to run a B main prior to their A main
  • Tires
    • SPUD CUP tires are Evinco Blue
    • Kid Kart: no tire rule
    • Tire compound is Evinco Blue
    • JR 1 tire sizes are 4.5/10-5 front and rear
    • JR 2, Senior, World Formula tire sizes are 4.5/10-5 front and 6.0/11-5 rear
    •  100CC Classes: Evinco Blue 4.5/7.1
    • You must qualify and race on the same set of tires
    • Rain tires will be open tire rule
  • Kid Kart
    • Age: 5-7 (Must be the age of 5 before being able to perform any on track activity)
    • Can move up to JR 1 once the age of 7 is achieved.
    • Engine: Comer C50 or Honda GXH50, or Honda GX35 engines must remain 100% stock
    • Chassis: Kid Kart chassis only
    • Weight: no minimum
    • Fuel: pump gas only
    • This class will be a non-competitive class and will receive no points and will be ran with no transponders.
  • JR 1 LO206 and JR 1 LO206 Novice
    • Age: 7-11
    • Engine: Briggs and Stratton LO206
    • Slide: Blue Slide Part #555734
    • Chassis: Rookie or adult size
    • Weight: 250 lbs. minimum
    • Fuel: Pump gas non ethanol
    • JR1 Novice will be a non points class with the intent to develop drivers and move them up to JR 1. Upward movement to JR1 will be ONLY approved by the track.
  • JR 2 LO206
    • Age: 11-15
    • Engine: Briggs and Stratton LO206
    • Slide: Black Slide Part #555590
    • Chassis: Adult size only
    • Weight: 320 lbs. minimum
    • Fuel: Pump gas non ethanol
  • Senior LO206
    • Age: 15+
    • Engine: Briggs and Stratton LO206
    • Slide: Black Slide Part #555590
    • Chassis: Adult size only
    • Weight: 360 lbs. minimum
    • Fuel: Pump gas non ethanol
  • Heavy LO206
    • Age: 30+ or 200lbs in driving gear
    • Engine: Briggs and Stratton LO206
    • Slide: Black Slide Part #555590
    • Chassis: Adult size only
    • Weight: 390 lbs. minimum
    • Fuel: Pump gas non ethanol
  • World Formula
    • Age: 15+
    • Engine: Briggs World Formula
    • Slide: Stock Slide Part #557083
    • Chassis: Adult size only
    • Weight: 390 lbs. minimum
    • Fuel: Pump gas non ethanol
  • Sportsman
    • Age: 15+ (Exhibition Class so a 15 year old JR2 driver would not lose JR2 eligibility)
    • Engine: Briggs and Stratton LO206, Doug Fleming sealed Harbor Freight Ghost
    • Slide: Black stock slide
    • Chassis: Adult size only
    • Weight: 360 lbs. minimum for lightweight, 390 lbs. minimum for heavyweight
    • Fuel: Pump gas non ethanol
    • Tire: MG Gold 4.6/6.0
  • JR 100cc
    •  Age: 11-15
    •  Engines: IAME KA100, ROK VLR 100cc, Italian Motors X100AC
    • All competitors must have the mandated silencer to be able to practice on non race days. Can be purchased from Doug Fleming.
    • Chassis: Adult size only
    • Weight: 310lbs., (Italian Motors X100AC 320lbs.)
    • If an engine manufacturer is deemed to have an advantage weight may be added to even the playing field. Or mandatory dyno by Doug Fleming before being allowed to run again.
    • Fuel: Non Oxygenated Race or Pump Gas/oil only
    • Engine Rules: Based of Challenge of Americas Rule Set for 2023
  •  Senior 100cc
    •  Age: 15+
    •  Engines: IAME KA100, ROK VLR 100cc, Italian Motors X100AC
    • All competitors must have the mandated silencer to be able to practice on non race days. Can be purchased from Doug Fleming.
    • Chassis: Adult size only
    • Weight: 360 lbs. minimum, ROK VLR 100cc 350lbs.  (For Masters it is 390 lbs. and 380 lbs. for ROK VLR)
    • If an engine manufacturer is deemed to have an advantage weight may be added to even the playing field. Or mandatory dyno by Doug Fleming before being allowed to run again.
    • Fuel: Non Oxygenated Race or Pump Gas/oil only
    • Engine Rules: Based of Challenge of Americas Rule Set for 2024

Rule Book Locations