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2025 Race Classes

2024 Race Classes

2025 Race classes

Spec Fuel: VP MS98L or 87 pump gas.  See individual class listings for specified fuel.

Mixing of fuel brands or types is ILLEGAL and will result in a DQ.  Any additives, whether they are performance enhancing or not, are ILLEGAL and will result in a DQ (with the exception of manufacturer additives present in pump gas from the pump).

 

It is advised to purchase pump fuel the day of the race.  A test sample of both fuels will be taken that day and used by Post Tech for comparison.

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Legal 87 octane pump gas can be purchased at these local stations only

for races at the respective tracks:

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Adams Motorsports Park

Arco (AM/PM) Market

2985 Rubidoux Blvd.

Riverside, CA 92509

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K1 Circuit

Arco (AM/PM) Market

26050 Menifee Road

Menifee, CA 92585

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The K1 Circuit facility has a 95 Db noise limit for all karts.  If your kart fails this requirement, then that kart cannot run on track

 Kid Kart Tillotson 

Age: 5-7 years (driver must have attained the age of 5 before competing)

Weight: 160 lbs

Tires: Hoosier R60B 4.50/10.0-5 front & Rear

  • Circumference: 32" - 32.50"

  • Tire pressure not to exceeded 20 PSI in post tech inspection.

Wheels: Overall width 130-140mm

Overall Width: Front Maximum 42”; Rear Minimum 39” – Maximum 42”

Rear Bumper: Must protect the rear wheels and come to roughly the middle of the rear tires. May not exceed the outer plane of the rear wheel/tire. (Exception – Bumper may extend beyond rear tires in rain conditions).

Bodywork: Side pods may not exceed maximum overall width of rear axle.

Engine: 

  • Tillotson 105R Bambino

Clutch: TBA

Fuel: Pump gas only (see Spec fuel at top of page)

Tech Specs: Tillotson engine must have factory seals intact. 

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 TaG Micro 

Competition Age: 7-10 years

Weight: 225 lbs.

Tires: Hoosier R60B 4.50/10.0-5 front & Rear

Wheels: No width restrictions

Engine:

  • IAME Micro Swift 60cc restricted header as supplied by manufacturer

  • Vortex Micro Rok 60cc restricted header as supplied by manufacturer

Fuel: VP 98L

Oil:

  • Motul Kart Grand Prix

  • Elf HTX 909 SAE 50

Tech Specs: IAME Swift 60cc and Rok Cup USA Vortex Rok 60cc

Supplemental rules: Tri-C supplemental rules

 100cc Tag Junior 

Competition Age: 12-16 years

Weight: 320 lbs.

Tires: Hoosier R60B 4.50/10.0-5 front,

R60B 7.10/11.0-5 Rear

Engine:

  • IAME KA100 with 22mm IAME factory header

Fuel: VP 98L

Oil:

  • Motul Kart Grand Prix

  • Elf HTX 909 SAE 50

Tech Specs: IAME KA100 

Supplemental rules: Tri-C supplemental rules

 100cc Tag Master 

Competition Age: 30+ years

Weight: 380 lbs.

Tires: Hoosier R60B 4.50/10.0-5 front,

R60B 7.10/11.0-5 Rear

Engine:

  • IAME KA100

  • Vortex Rok VLR 100cc

Fuel: VP 98L

Oil:

  • Motul Kart Grand Prix

  • Elf HTX 909 SAE 50

Tech Specs:

Supplemental rules: Tri-C supplemental rules

 Briggs Lo206 Master
(Tenatative)

Competition Age: 35+ years
Weight: 370 lbs.
Tires: Hoosier R70 4.50/10.0-5 front,
R70 6.00/11.0-5 Rear
Engine:

  • Briggs & Stratton LO206

  • Carburetor slide - Black (stock)

Clutch:

  • See Briggs & Stratton LO206 2024 Regulations

Fuel: pump gas only (see spec fuel at top of page)
Tech Specs:

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 tillotson t225 Senior 

Competition Age: 15+ years
Weight: 350 lbs.
Tires: Hoosier R70 4.50/10.0-5 front,
R70 6.00/11.0-5 Rear
Engine:

  • Tillotson TPP-225RS

Clutch:

  • See Tillotson 2024 US regulations

Fuel: pump gas only (see spec fuel at top of page)
Tech Specs:

 opEN sHIFTER Senior 

Competition Age: 15+ years
Weight: 

  • KZ & ICC                                              395 lbs

  • IAME SSE 175                                      395 lbs

  • Vortex Rok Shifter                               385 lbs.

  • Honda CR125 "Stock Moto"             370 lbs

  • Yamaha FZ125 "Stock Moto"            370 lbs

Tires: 

  • Evinco M "Red"

  • Hoosier R55

  • Vega XH4

Engine:

Fuel: VP98L
Oil:

  • Motul Kart Grand Prix

  • Elf HTX 909 SAE 50

 TaG Mini  

Competition Age: 8-13 years

Weight: 245 lbs.

Tires: Hoosier R60B 4.50/10.0-5 front & Rear

Wheels: No width restrictions

Engine:

  • IAME Mini Swift 60cc 

  • Vortex Mini Rok 60cc 

Fuel: VP 98L

Oil:

  • Motul Kart Grand Prix

  • Elf HTX 909 SAE 50

Tech Specs: IAME Swift 60cc and Rok Cup USA Vortex Rok 60cc

Supplemental rules: Tri-C supplemental rules

 100cc Tag Senior 

Competition Age: 15+ years

Weight: 360 lbs.

Tires: Hoosier R60B 4.50/10.0-5 front,

R60B 7.10/11.0-5 Rear

Engine:

  • IAME KA100

  • Vortex Rok VLR 100

Fuel: VP 98L

Oil:

  • Motul Kart Grand Prix

  • Elf HTX 909 SAE 50

Tech Specs:

Supplemental rules: Tri-C supplemental rules

 Briggs Lo206 Senior 

Competition Age: 15+ years

Weight: 350 lbs.

Tires: Hoosier R70 4.50/10.0-5 front,

R70 6.00/11.0-5 Rear

Engine:

  • Briggs & Stratton LO206

  • Carburetor slide - Black (stock)

Clutch:

  • See Briggs & Stratton LO206 2024 Regulations

Fuel: pump gas only (see spec fuel at top of page)

Tech Specs:

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 tillotson t225 Junior 

Competition Age: 11-15 years
Weight: 320 lbs.
Tires: Hoosier R70 4.50/10.0-5 front,
R70 6.00/11.0-5 Rear
Engine:

  • Tillotson TPP-225RS

Clutch:

  • See Tillotson 2024 US regulations

Fuel: pump gas only (see spec fuel at top of page)
Tech Specs:

 tillotson t225 Master 

Competition Age: 35+ years
Weight: 370 lbs.
Tires: Hoosier R70 4.50/10.0-5 front,
R70 6.00/11.0-5 Rear
Engine:

  • Tillotson TPP-225RS

Clutch:

  • See Tillotson 2024 US regulations

Fuel: pump gas only (see spec fuel at top of page)
Tech Specs:

 opEN sHIFTER Master

Competition Age: 32+ years
Weight: 

  • KZ & ICC                                              TBA lbs

  • IAME SSE 175                                      TBA lbs

  • Vortex Rok Shifter                               TBA lbs.

  • Honda CR125 "Stock Moto"             TBA lbs

  • Yamaha FZ125 "Stock Moto"            TBA lbs

Tires: 

  • Evinco M "Red"

  • Hoosier R55

  • Vega XH4

Engine:

Fuel: VP98L
Oil:

  • Motul Kart Grand Prix

  • Elf HTX 909 SAE 50

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