Title: B4/Renault MSA Formula KF3 British Championship

Overview: Replaces Formula JICA and is the Motor Sports Association (MSA) Junior British Karting Championship. Primarily for drivers aged between 13 and 17, although drivers aged 12 can compete if they have the necessary prior experience. This class is also raced internationally and drivers will also compete in European and World events.

Driver age: 13-17 (12 with prior experience)

Engine: 125cc reed valve engine, restricted 14,000rpm

Drive: Direct drive, centrifugal clutch

Chassis: CIK homologated

Tyres: Bridgestone

Identification: Yellow plate, black numbers.

Format: Timed qualifying determines grid position for two heats; best 24 drivers progress to two finals. Finishing order of final one is the grid order for final two. Championship points awarded for both finals. 12 championship races (six events) with the worst two scores (not including disqualifications) dropped.