KZ1 is a kart racing class using 125 cc water-cooled two-stroke engines yielding approximately 46–50 hp (34–37 kW), equipped with a six-speed gearbox. KZ1 is the fastest of the KZ karting racing categories, and technical regulations are similar to KZ2 except that KZ1 allows for the gearbox to be either manual or electro-mechanical as well as the wise use of soft tires.^[1] Both engines and chassis must be approved by the CIK-FIA racing governing commission. It is open to top drivers aged 15 and over. Minimum weight is 170 kg (370 lb), this includes the kart and driver. They can accelerate from 0-100 km/h in 3 seconds. KZ1 has a top speed of 180 km/h (110 mph).

This class used to be called Formula C. It was discontinued in favor of Super ICC and renamed KZ1 by the CIK-FIA in January 2007.

There is a European KZ1 Championship and a World Cup, both organized under CIK-FIA.

CIK-FIA Karting World Champions

Year	World Champion	Chassis / Engine / Tire	Class
1983	Gianni Mazzola	Birel / Balen / Dunlop	Formula C
1984	Gabriele Tarquini	Kalì / Balen / Dunlop	Formula C
1985	Piermario Cantoni	Kalì / Balen / Dunlop	Formula C
1986	Fabrizio Giovanardi	Tony Kart / Pavesi / Bridgestone	Formula C
1987	Alessandro Piccini	DAP / Pavesi / Vega	Formula C
1988	Peter Rydell	All Kart / Pavesi / Dunlop	Formula C
1989	Gianluca Giorgi	Kalì / Kalì / Dunlop	Formula C
1990	Alessandro Piccini	Birel / Pavesi / Bridgestone	Formula C
1991	Alessandro Piccini	Birel / Pavesi / Dunlop	Formula C
1992	Danilo Rossi	Kalì / Pavesi / Dunlop	Formula C
1993	Alessandro Piccini	Kalì / Pavesi / Dunlop	Formula C
1994	Jarno Trulli	Tony Kart / Pavesi / Dunlop	Formula C
1995	Gianluca Beggio	Biesse / TM / Vega	Formula C
1996	Gianluca Beggio	Biesse / TM / Bridgestone	Formula C
1997	Gianluca Beggio	Birel / TM / Bridgestone	Formula C
1998	Gianluca Beggio	Birel / TM / Bridgestone	Formula C
1999	Francesco Laudato	Birel / TM / Dunlop	Formula C
2000	Gianluca Beggio	Birel / TM / Bridgestone	Formula C
2001 2002	not held
2003*	Robert Dirks	Birel / TM / Vega	Super ICC
2004*	Ennio Gandolfi	Birel / TM / Vega	Super ICC
2005*	Francesco Laudato	Birel / TM / Vega	Super ICC
2006*	Davide Forè	Tony Kart / Vortex / Vega	Super ICC
2007*	Jonathan Thonon	CRG / Maxter / Dunlop	KZ1
2008*	Jonathan Thonon	CRG / Maxter / Dunlop	KZ1
2009*	Jonathan Thonon	CRG / Maxter / Dunlop	KZ1
2010*	Bas Lammers	Intrepid / TM / Dunlop	KZ1
2011*	Jonathan Thonon	CRG / Maxter / Dunlop	KZ1
2012*	Bas Lammers	Praga / Parilla / Bridgestone	KZ1
2013	Max Verstappen	CRG / TM / Bridgestone	KZ
2014	Marco Ardigo	Tony Kart / Vortex / Bridgestone	KZ
2015	Jorrit Pex	CRG / TM / Bridgestone	KZ
2016	Paolo de Conto	CRG / TM / Vega	KZ
2017	Paolo de Conto	CRG / TM / Vega	KZ
2018	Patrik Hajek	Kosmic / Vortex / LeCont	KZ
2019	Marijn Kremers	Birel / TM / Bridgestone	KZ
2020	Jérémy Iglesias	Formula K / TM / Vega	KZ
2021	Noah Milell	Tony Kart / Vortex / MG	KZ
2022	Viktor Gustafsson	CRG / TM / LeCont	KZ
2023	Paolo Ippolito	Kart Republic / IAME / LeCont	KZ

* indicate World Cup, which replaced the World Championship from 2000-2012

CIK-FIA Karting European Champions

Year	Driver	Chassis	Engine	Tyre	Class
1974	Aad van Daalen	Landia	Yamaha		Formula C - 125cc
1975	Ben van Velzen	Mach 1	Yamaha		Formula C - 125cc
1976	Gianfranco Baroni	All Kart	BMC		Formula C - 125cc
1977	Gianfranco Baroni	All Kart	BMC		Formula C - 125cc
1978	Gianfranco Baroni	All Kart	BMC		Formula C - 125cc
1979	Giancarlo Vanaria	Kali Kart	Rotax	B	Formula C - 125cc
1980	Gianfranco Baroni	Birel	BMC		Formula C - 125cc
1981	Gianfranco Baroni	Birel	BMC		Formula C - 125cc
1982	Alessandro Piccini	Allkart	Morbidelli		Formula C - 125cc
1982	Peter De Bruijn	Tecno Kart	Parilla		Formula K
1983	Mike Wilson	Birel	Parilla		Formula K
1984	Mike Wilson	Birel	Parilla		Formula K
1985	Stefan Frietsch	Kali Kart	Komet		Formula K
1986	Yvan Muller	Kali Kart	Komet		Formula K
1987	Alex Zanardi	Kali Kart	Komet		Formula K
1988	Federico Gemmo	Tecno Kart	Komet		Formula K
1989	Marc Goossens	Tecno Kart	Komet		Formula K
1990	Martijn Koene	Swiss Hutless	Rotax		Formula K
1991	Massimiliano Orsini	Tony Kart	Rotax		Formula SA
1992	Gianluca Beggio	Kali Kart	Rotax	B	Formula K
1993	Nicola Gianniberti	Haase	Rotax	D	Formula SA
1994	Jarno Trulli	Tony Kart	Rotax	B	Formula SA
1995	Massimiliano Orsini	Swiss Hutless	Italsistem	B	Formula SA
1996	Jonny Mislijevic	Tony Kart	Vortex	B	Formula SA
1996	Alessandro Piccini	CRG	Pavesi	B	Formula C
1997	Jenson Button	Tecno Kart	Rotax	B	Formula SA
1997	Gianluca Beggio	Birel	TM	B	Formula C
1998	Davide Forè	Tony Kart	Rotax	B	Formula SA
1998	Gianluca Beggio	Birel	TM	B	Formula C
1999	Giuseppe Palmieri	Swiss Hutless	Italsistem	B	Formula SA
1999	Ronnie Quintarelli	Tony Kart	Vortex	B	Formula C
2000	Mario Siegers	Trulli Kart	Vortex	B	Formula SA
2000	Francesco Laudato	Birel	TM	B	Formula C
2001	Alessandro Piccini	CRG	TM	B	Formula C
2002	Sauro Cesetti	Kosmic	Vortex	B	Super-ICC
2003	Alessandro Manetti	CRG	Pavesi	D	Super-ICC
2004	Francesco Laudato	Birel	TM	Vega	Super-ICC
2005	Francesco Laudato	Birel	TM	Vega	Super-ICC
2006	Roberto Toninelli	BRM	TM	Vega	Super-ICC
2007	Alessandro Manetti	Intrepid	TM	D	KZ1
2008	Jonathan Thonon	CRG	Maxter	D	KZ1
2009	Bas Lammers	Intrepid	TM	D	KZ1
2010	Bas Lammers	Intrepid	TM	D	KZ1
2011	Paolo De Conto	Energy Corse	TM	D	KZ1
2012	Jorrit Pex	CRG	TM	B	KZ1
2013	Max Verstappen	CRG	TM	B	KZ
2014	Rick Dreezen	Zanardi	Parilla	B	KZ
2015	Flavio Camponeschi	Tony Kart	Vortex	B	KZ
2016	Marco Ardigò	Tony Kart	Vortexl	Vega	KZ
2017	Paolo De Conto	CRG	TM	B	KZ
2018	Jorrit Pex	CRG	TM	LeCont	KZ
2019	Jorrit Pex	Kart Republic	TM	B	KZ
2020	Marijn Kremers	Riccardo Kart	TM	Vega	KZ
2021	Riccardo Longhi	Birel ART	TM	MG	KZ
2022	Paolo Ippolito	Kart Republic	IAME	LeCont	KZ
2023	Danilo Albanese	Kart Republic	IAME	LeCont	KZ

See also

• KF1, the top level of karting
• KF2, a KF1 feeder series
• KF3, a KF2 and KF1 feeder series
• KZ2, the second fastest KZ karting racing category
• Superkart, road racing with kart sized open-wheel cars

References

External links

• CIK-FIA website