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KF3 is a kart racing class for top drivers aged 12 to 15 (drivers must reach the age of 13 within the first semester of calendar year).

This class used to be called Junior Intercontinental A (JICA or ICA-J) and has changed since January 2007 when CIK-FIA decided to replace the 100 cc air-cooled two-stroke engines with 125 cc Touch-and-Go (TaG) water-cooled two-stroke engines (KF type). Chassis and engines must be approved by the CIK-FIA. Minimum weight is 145 kg with driver.

Karts are equipped with an electric starter and clutch. The engine is limited to 14,000 rpm.

It is one of the highest kart classes with national championships (perhaps with different tyre rules).

There is a European championship, a World Cup, as well as Oceania and Asia-Pacific championships. The Junior Monaco Kart Cup is taking place each year in this format.


Year European Champion [1] Chassis / Engine / Tires
1999 Austria Reinhard Kofler [2] Tony Kart / Vortex
2000 Germany Michael Ammermüller n/a
2001 Germany Sebastian Vettel Tony Kart / Vortex / Vega
2002 Switzerland Sébastien Buemi CRG / Maxter / Vega
2003 Italy Nicholas Risitano Birel / TM / Vega
2004 Monaco Stefano Coletti Birel / Parilla / Vega
2005 Denmark Michael Christensen Gillard / Parilla / Bridgestone
2006 Spain Miquel Monrás Maranello / Parilla / Vega
2007 United Kingdom Jack Harvey Maranello / XTR / Dunlop
2008 Finland Aaro Vainio Maranello / Maxter / Dunlop
2009 Netherlands Nyck de Vries Zanardi / Parilla / Vega
2010 United Kingdom Alexander Albon Intrepid / TM / Dunlop
2011 United Kingdom George Russell Intrepid / TM / Vega
2012 United Kingdom George Russell Tony Kart / Vortex / Vega
Year World Cup Winner [1] Chassis / Engine / Tires
2009 Italy Giuliano Niceta Tony Kart / Vortex / Vega
2010 United Kingdom Alexander Albon Intrepid / TM / Dunlop
2011 Monaco Charles Leclerc Intrepid / TM / Vega

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