Senior classes KF1 / Super-KF (2007–2012) KF1—replaced by
Super-KF (SKF) from 2009 to 2010—was the primary senior class in competition from 2007 to 2012 for drivers aged 15 and over. SKF differed from KF1 with
non-homologated engines, whilst retaining the free
chassis,
brakes, and
tyres. It hosted the
World Championship in each year of its existence bar 2010, where it was replaced by
KF2. Additional international titles that have been held in KF1 / SKF since 2007:
KF / KF2 (2007–2015) KF2 was the secondary senior class from 2007 to 2012 for drivers aged 15 and over, before becoming the primary class in 2013 as
KF. It hosted the
World Championship four times: 2010, 2013, 2014, and 2015. Additional international titles that have been held in OK since 2016:
OK-National (2023–present) OK-National (OK-N) was introduced as the secondary senior class in 2023 for drivers aged 15 and over, and has hosted a
World Cup since 2024.
Italics indicates the championships where OK-N was the secondary senior class. Additional international titles that have been held in OK-N since 2023:
Junior classes KF-Junior / KF3 (2007–2015) KF3 was introduced as the junior class in 2007 for drivers aged 13 to 15, being upgraded to
World Championship status in 2010 as the
U18 World Championship; Additional international titles that have been held in OK-J since 2016:
OKN-Junior (2023–present) OKN-Junior (OKN-J) was introduced as a secondary junior class in 2023 for drivers under the age of 15, and will host a
World Cup from 2025 onwards.
Italics indicates the championships where OKN-J was the secondary junior class. Additional international titles that have been held in OKN-J since 2023:
Gearbox classes KZ / KZ1 (2007–present) KZ1 became the primary
gearbox class for drivers aged 15 and over in 2007 and was renamed to
KZ in 2013, when it was upgraded to
World Championship status. Additional international titles that have been held in KZ / KZ1 since 2007:
KZ2 (2007–present) KZ2 was introduced as the secondary
gearbox class for drivers aged 15 and over in 2007, and has hosted a
World Cup since 2011.
Italics indicates the championships where KZ2 was the secondary gearbox class. Additional international titles that have been held in KZ2 since 2007:
KZ2-Masters (2022–present) KZ2-Masters (KZ2-M) was introduced at the
World Cup in 2022 as a
gearbox class for drivers aged 35 and over. Additional international titles that have been held in KZ2-M since 2022:
Other classes Superkart (2007–2019) The
superkart class ran from 2002 to 2019 at the
European Championship, with a secondary division also contested in 2003 and 2004.
Superkart-1 (2007–2019) Academy (2010–present) The
Academy Trophy was inaugurated in 2010 as a
spec series for junior drivers aged 12 to 14. The competition was divided into
Junior (12–14) and
Senior (14–16) classes in 2025.
Single-class Academy (2010–2024) Academy-Senior (2025–present) Academy-Junior (2025–present) Additional international titles that have been held in Academy since 2010:
60 Mini (2020–present) 60 Mini has been present in international competition from as early as 2010 for drivers under the age of 12, but was not formally recognised by the until 2020. This table includes results from
Mini Gr.3, a derivative subclass using
IAME engines. Additional international titles that have been held in 60 Mini since 2020: == By driver ==