CKT CLASS STRUCTURE

The Colorado Karting Tour is a regional racing series for competitive, high-performance go kart racing in the state of Colorado. The sport of karting has traditionally separated racing classes on the basis of two primary factors:

  • Age of the driver
  • Minimum weight (of kart and driver together)

Together, these two factors have driven karting class structure for nearly 6 decades.

Thanks to the dedicated work of reknown sanctioning bodies such as the FIA, the International Karting Federation, and SKUSA, the class structure present today with CKT has been tailored to provide a progressive, safe, and reasonable progression for kart racers from the age of 5 and upward.

At The Colorado Karting Tour, we do our best to provide a racing class for all ages, experience level, and racing budget. Below is our 2017 list of racing classes, with a place for anyone age 5 and up to race.

*Note: ‘LBS’ denotes the minimum weight that the kart and driver must weigh upon exiting the racetrack after each racing event (driver, kart, and all safety equipment are weighed together).

Questions about a racing class? Contact us to learn details about any class listed.

2018 CKT Supported ClassesAge Range Engine & Powertrain
Primary Ruleset
Min. Weight (lbs.)
Tires Compound, SizeFuel / Oil
Kid Kart5-8Honda GX50IKF150(1 set)
Evinco Blue
4.5 x 10-5
MS 93 / 4T or Redline
Cadet7-10Briggs L.O.206 (Green Slide, Max Torque Clutch)
IKF 240(4 sets)
Evinco Blue
4.5 x 10-5
MS 93 / 4T or Redline
JR I9-13Briggs L.O.206 (Black Slide, IKF Junior 1 Clutch Rules)IKF 240Evinco Blue
4.5 x 10-5
MS 93 / 4T or Redline
JR II12-15Briggs L.O.206 (Black Slide, Junior 2 IKF Clutch Rules)IKF 310Evinco Blue
4.5 x 10-5 Front
6.0 x 11-5
MS 93 / 4T or Redline
Rotax Micro7-11Rotax Micro MaxRotax235Evinco Blue
4.5 x 10-5
MS 93 / XPS
Rotax Mini10-13Rotax Mini MaxRotax265Evinco Blue
4.5 x 10-5
MS 93 / XPS
Rotax Junior12-16Rotax JuniorRotax320Evinco Red
4.5 x 10-5 Front
7.1 x 11-5 Rear
MS 93 / XPS
Rotax Senior15+Rotax FR-125Rotax
364Evinco Red
4.5 x 10-5 Front
7.1 x 11-5 Rear
MS 93 / XPS
Rotax Masters32+Rotax FR-125Rotax
395Evinco Red
4.5 x 10-5 Front
7.1 x 11-5 Rear
MS 93 / XPS
Open Tag15+Max 125cc 2 stroke or 250cc 4 stroke enginesIKF365Evinco Red
4.5 x 10-5 Front
7.1 x 11-5 Rear
Unaltered Race Fuel / 2-Stroke Oil
IAME KA10015+IAME KA 100 USPKS / SKUSA 365Evinco Blue
4.5 x 10-5 Front
6.0 x 11-5 Rear
C-12 / Motul 2-cycle Engine Oil
Stock Honda Shifter15+Honda CR-125SKUSA385Evinco Red
4.5 x 10-5 Front
7.1 x 11-5 Rear
C-12 / Motul 2-cycle Oil
Open Shifter15+Max 125cc 2 stroke or 250cc 4 stroke enginesIKF385Evinco Red
4.5 x 10-5 Front
7.1 x 11-5 Rear
Unaltered Race Fuel / 2-Stroke Oil
L.O. 206 Light14+Briggs L.O. 206 (Black Slide)IKF 345Duro
4.5 x 10-5 Front
7.1 x 11-5 Rear
ShellV91 / 4T or Redline
L.O. 206 Heavy14+Briggs L.O. 206 (Black Slide)IKF385Duro
4.5 x 10-5 Front
7.1 x 11-5 Rear
ShellV91 / 4T or Redline