The British Superkart Championship runs two packages for four classes.
Division 1 Superkarts is the Premier Superkart Class in European competition, featuring twin cylinder 250cc engines
Formula 250 National the MSA British Championship class for single cylinder 250cc engines
Formuale 450 the championship class for 4 stroke engines
Formula 125 Open uses single cylinder 125cc engines; engine tuning is allowed in this class
In 2009, the Formula 450 National was first run within British Superkart events, running on 250 chassis featuring 450cc single-cylinder four-stroke engines, primarily the KTM engine. The Division 1, MSA 250 National and 450 classes are grouped together in one package. On a number of occasions during a season, the two groups are run together in one meeting, most notably the MSA British Superkart Grand Prix and the UK Cup event, but they run separate calendars for the majority of the season.
Outside of motoring circles, Superkarts are under-publicised. In May 2007, Autocar Magazine ran a video track test of a 250 National Superkart round Cadwell Park, with Chris Harris describing Superkart drivers as "... completely mad", and "... the biggest collection of loonies anywhere on planet earth". Even David Coulthard described driving a Superkart as "one of the most frightening things I have ever had to do". In 2009, Valentino Rossi drove a Superkart round Mazda Raceway Laguna Seca, beating Superkart veterans and former Moto GP heroes Wayne Rainey and Eddie Lawson in an exhibition race before the Moto GP round at Laguna.