OK-Junior is a kart racing class for top drivers between 12 years old (reaching their 12th birthday during the calendar year) and 14 years of age (reaching their 14th birthday during the 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).The engines produce . The chassis and engines must be approved by the CIK-FIA. Minimum weight is 145 kg, including kart and driver.
Karts are equipped with an electric starter and clutch. The engine rpm 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.
For 2013 the class was renamed KF-Junior.
In 2016, the karts were completely re-designed by removing much of the electronics. The karts are now push started. The class was subsequently renamed OK-Junior, standing for Original Kart.
Champions World Year World Cup Winner Chassis / Engine / Tires 2009 Giuliano Niceta Tony Kart / Vortex / Vega 2010 Alexander Albon Intrepid / TM / Dunlop 2011 Charles Leclerc Intrepid / TM / Vega 2012 Luca Corberi Kosmic / Vortex / Vega
Year World Championship Winner Chassis / Engine / Tires 2013 Alessio Lorandi Tony Kart / Parilla / LeCont 2014 Enaam Ahmed FA Kart / Vortex / Vega 2015 Logan Sargeant FA Kart / Vortex / LeCont 2016 Victor Martins Kosmic / Parilla / Vega 2017 Dexter Patterson Exprit / TM / LeCont 2018 Victor Bernier Kosmic / Parilla / Vega 2019 Thomas ten Brinke FA Kart / Vortex / LeCont 2020 Freddie Slater Kosmic / Vortex / LeCont 2021 Kean Nakamura-Berta Exprit / TM / MG 2022 Enzo Tarnvanichkul Tony Kart / Vortex / Vega 2023 Dries Van Langendonck Exprit / TM / Vega 2024 Kenzo Craigie KR / IAME / Maxxis 2025 Noah Baglin KR / IAME / Maxxis
Europe Year European Champion 1990 – 2008 CIK-FIA Results Chassis / Engine / Tires 1999 Reinhard Kofler Tony Kart / Vortex 2000 Michael Ammermüller Tony Kart / Vortex 2001 Sebastian Vettel Tony Kart / Vortex / Vega 2002 Sébastien Buemi CRG / Maxter / Vega 2003 Nicholas Risitano Birel / TM / Vega 2004 Stefano Coletti Birel / Parilla / Vega 2005 Michael Christensen Gillard / Parilla / Bridgestone 2006 Miquel Monrás Maranello / Parilla / Vega 2007 Jack Harvey Maranello / XTR / Dunlop 2008 Aaro Vainio Maranello / Maxter / Dunlop 2009 Nyck de Vries Zanardi / Parilla / Vega 2010 Alexander Albon Intrepid / TM / Dunlop 2011 George Russell Intrepid / TM / Vega 2012 George Russell Tony Kart / Vortex / Vega 2013 Lando Norris FA Kart / Vortex / LeCont 2014 Enaam Ahmed FA Kart / Vortex / Vega 2015 Brenden Wyer Tony Kart / Vortex/ LeCont 2016 Fin Kenneally FA Kart / Vortex / Vega 2017 Jonny Edgar Exprit / TM / LeCont 2018 Paul Aron FA Kart / Vortex / Vega 2019 Marcus Amand Kosmic / Parilla / LeCont 2020 Ugo Ugochukwu Kart Republic / Parilla / LeCont 2021 Freddie Slater Kosmic / Vortex / MG 2022 Anatoly Khavalkin Parolin / TM / Vega 2023 Oleksandr Bondarev Kart Republic / IAME / Vega 2024 Dries van Langendonck Exprit / TM / Maxxis 2025 Dean Hoogendoorn KR / IAME / Maxxis
See also KF1, the top level of karting KF2, another KF1 feeder series besides KF3 KZ1, the fastest KZ karting racing category KZ2, the second fastest KZ karting racing category Superkart, road racing with kart sized open-wheel cars Karting World Championship Karting European Championship
References
External links CIK-FIA – International Karting Governing Body