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What an owner-driver class is
Owner-driver karting means racing your own kart (or one you lease) in a class set by Motorsport UK's rules. The class decides the engine, the chassis, the tyres and the age of the driver. Motorsport UK's beginner leaflet groups them into Bambino, Cadet, Mini, Junior, Senior and gearbox categories, and says the best advice is to visit a local circuit to see what is popular there. Classes change by club and by year, so treat the ages below as a guide and check the current regulations.
How to get a licence is covered in clubs and championships.
Bambino (ages 6 to 8)
Bambino is Motorsport UK's entry class for young children. It is pre-race training on circuits specifically licensed for it, with small, low-powered karts. Competition begins with time trials so children can get used to being on track. Motorsport UK's December 2020 Bambino guidance allowed racing from age 7 for children with time-trial experience; check current rules. Rye House Kart Club lists Comer Bambino, and the 2026 IAME series lists an M1 Bambino class for ages 6 to 8.
It suits young children whose parents want a supervised start.
Cadet (about ages 8 to 12)
Cadet is the class most children move into from age 8. Motorsport UK says Cadet racing is very popular and a good way to learn the basics. Current class pages give:
- Honda Cadet GX200 - ages 8 to 12, a sealed 200cc four-stroke Honda engine.
- IAME Water Swift Restricted - ages 8 to 12, a 60cc water-cooled IAME engine.
- Rotax MicroMax - ages 8 to 12, a restricted 125cc water-cooled two-stroke.
It suits children from age 8. Honda is the four-stroke route, and IAME and Rotax are two-stroke.
Inter and Mini classes (about ages 10 to 13)
These classes sit between Cadet and Junior and use a 950mm chassis. The 2026 series pages list IAME Water Swift (Inter) at ages 10 to 13 and Rotax MiniMax 950 at ages 10 to 13. Motorsport UK's 2021 leaflet gave Mini as the lowest-powered full-size class from age 11, which shows the bands differ between sources.
Junior (about ages 12 to 15)
Junior classes use full-size karts with restricted engines.
- IAME Junior X30 - ages 12 to 15, restricted 125cc water-cooled IAME engine.
- Junior Rotax - ages 12 to 15, restricted 125cc water-cooled two-stroke.
Motorsport UK's 2021 leaflet gave a broader Mini and Junior grouping of ages 11 to 16 with a choice of IAME, Rotax or TKM engines.
Senior (ages 15 or 16 and over)
These are the main adult classes.
- IAME Senior X30 - age 15 and over, an unrestricted 125cc water-cooled engine.
- Senior Rotax - age 15 and over, a 125cc water-cooled Rotax.
Motorsport UK's leaflet describes Seniors as suitable from the year of the 16th birthday. The class organisers' own pages list 15. Check which applies at the club you join.
The Motorsport UK list also includes gearbox karts for ages 16 and over, which the leaflet describes as the most powerful short-circuit karts, and Clubman karting from age 11. The leaflet describes Clubman as an entry point to club racing where equipment can often be hired from the organisers.
Club100 arrive-and-drive
Club100 is not an owner-driver class. It is the main UK arrive-and-drive series, so you race its karts rather than your own. Its site says it was established in 1993, runs Rotax Evo two-stroke karts, and is now part of the Rotax Racing Club.
| Section | Ages (per Club100) | Championships |
|---|---|---|
| Cadet | 7 to 12 | Southern (8 rounds), Northern (7 rounds) |
| Junior | 13 to 18 | Southern (8 rounds), Northern (7 rounds) |
| Senior | 16 and over | Sprint National, SP40 National, SP60 National (10 rounds each, three weight classes) |
Club100 says its season budget is set at the start and has no transport, storage, preparation, damage or engine rebuild costs. Motorsport UK's own page puts Club100 junior entry in "the year you turn 14", which differs from Club100's page, so use the organiser's figure and confirm when you enter.
It suits people who want to race without owning a kart, and it is a common step before racing your own at a club. Motorsport UK also lists the British Indoor Karting Championship, run through TeamSport membership, and student championships as ways in without owning a kart.
The British Kart Championships
At national level, Motorsport UK says the British Kart Championships run in Rotax, IAME, Honda and KZ2 categories, with the first three split by age or engine type to match club classes. KZ2 is a gearbox class and has no sub-classes.
Choosing a class
- Visit a club meeting in your area and see which classes have the biggest grids.
- Ask the club whether it runs the class you want. Not every club runs every class, and gearbox karts are not run everywhere.
- Hire or try first. Many clubs and ARKS schools offer test days.
Sources
- Motorsport UK, Want to start karting? leaflet (2021), Get Started: Kart, Karting, Bambino guidelines (2020)
- British Kart Championships, IAME, Rotax, Honda
- Club100, About, Senior karting
- Rye House Kart Raceway, Rye House Kart Club