Classes / Gearbox
KZ2
125cc international gearbox class, following the CIK-FIA KZ2 rules with a few UK differences.
The essentials
- Ages
- 15+From the calendar year of the 16th birthday with a Kart National licence and at least 10 kart events at 3 or more venues, or from the 15th birthday with an International ITE licence.
- Minimum weight
- 180 kg
- Number plates
- Yellow/Black
- Dry tyres
- Le Cont LPM 'CIK'Set from £209.81 inc VAT
- Wet tyres
- Le Cont LWR 'CIK'Set from £215.66 inc VAT
- Class owner
- Motorsport UK
From the Motorsport UK Karting Yearbook 2026, Version 1.1, page 74. Check the current regulations with the class owner before you buy.
Championships for KZ2
Next rounds
- Thu 8–Sat 10 Oct 2026BKC, Rotax Rounds 5&6; KZ2 Round 5Kart Silverstone
Where it's raced
Kart Silverstone, Kimbolton Kart Circuit, Larkhall Kart Circuit, PF International Kart Circuit, Rowrah Kart Circuit, Shenington Kart Circuit, Warden Law Kart Circuit, Whilton Mill Kart Circuit
Questions
- What age can you race KZ2?
- The Motorsport UK Karting Yearbook gives the age range as 15+. From the calendar year of the 16th birthday with a Kart National licence and at least 10 kart events at 3 or more venues, or from the 15th birthday with an International ITE licence.
- What is the minimum weight for KZ2?
- 180 kg for kart and driver, according to the Motorsport UK Karting Yearbook.
- What tyres does KZ2 use?
- Le Cont LPM 'CIK' for dry conditions and Le Cont LWR 'CIK' for wet conditions.
Other Gearbox classes: Superkart 250. All classes.