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KZ2 is akart racing class using 125 cc water-cooledtwo-stroke engines yielding about 52 hp (39 kW). The engines are equipped with a 6-speed gearbox. Z2 is the second fastest of the KZ karting racing categories, and technical regulations are similar to fasterKZ1 except that in KZ2 the gearbox must be "hand-operated and exclusively mechanical without a servo system", as well as the use of medium tires.[1] Both the engine and chassis must be approved by theCIK-FIA racing governing commission. The class is open to drivers aged 15 years and up with the minimum weight being 175 kg, this includes the kart and driver.
The KZ2 class used to be calledIntercontinental C (ICC) and was renamed by the CIK-FIA in January 2007.
The KZ2 class is run in both national and continental championships and is popular in Europe and the USA. In the UK, since the beginning of 2019, The Motorsport UK run championship is the only British Championship and runs to CIK regulations with Le Cont tyres. The NKF Super 4 series continues as KZ UK with a minimum weight of 180 kg but has no championship status.
| Year | Champion | Chassis / Engine / Tire | Class |
|---|---|---|---|
| 2013 |  Dorian Boccolacci | Energy Corse / TM /Bridgestone | KZ2 Supercup |
| 2014 |  Ryan Van Der Burgt | DR / Modena /Bridgestone | KZ2 Supercup |
| 2015 | Thomas Laurent | Tony Kart / Vortex / LeCont | KZ2 Supercup |
| 2016 |  Pedro Hiltbrand | CRG / Maxter / Vega | KZ2 Supercup |
| 2017 |  Alex Irlando | Sodikart / TM /Bridgestone | KZ2 Supercup |
| 2018 | Matteo Viganò | Tony Kart / Vortex /Bridgestone | KZ2 Supercup |
| 2019 | Emilien Denner | Sodikart / TM /Bridgestone | KZ2 Supercup |
| 2020 | Simone Cunati | Birel / TM / Vega | KZ2 Supercup |
| 2021 | Lorenzo Travisanutto | Parolin / TM / MG | KZ2 Supercup |
| 2022 | Arthur Carbonnel | CRG / TM / LeCont | KZ2 Supercup |
| Year | European Champion | Chassis / Engine / Tire | Class |
|---|---|---|---|
| 2007 | Thomas Knopper | PCR / TM /Dunlop | KZ2 |
| 2008 | Tony Lavanant | Energy Corse / TM /Bridgestone | KZ2 |
| 2009 | Angelo Lombardo | Tony Kart / Vortex /Bridgestone | KZ2 |
| 2010 | Paolo De Conto | Energy Corse / TM / Vega | KZ2 |
| 2011 | Fabian Federer | CRG / TM /Bridgestone | KZ2 |
| 2012 |  Simas Juodvirsis | Energy Corse / TM / Vega | KZ2 |
| 2013 |  Emil Antonsen | DR / TM /Bridgestone | KZ2 |
| 2014 | Andrea Dalè | CRG / Maxter /Bridgestone | KZ2 |
| 2015 |  Joel Johansson | Energy Corse / TM / LeCont | KZ2 |
| 2016 | Fabian Federer | CRG / TM /Bridgestone | KZ2 |
| 2017 |  Leon Köhler | Tony Kart / Vortex / Vega | KZ2 |
| 2018 | Adrien Renaudin | Sodikart / TM / LeCont | KZ2 |
| 2019 | Emil Skärås | Energy Corse / TM /Bridgestone | KZ2 |
| 2020 | Victor Gustavsson | Birel / TM / Vega | KZ2 |
| 2021 | Giacomo Pollini | CRG / TM / MG | KZ2 |
| 2022 | Tom Leuillet | Birel / TM / LeCont | KZ2 |
