Comer SW80 or Yamaha KT100J engine, dry weather tyres Dunlop SL1A, wet weather tyres Dunlop KT6SLW1. Competitor must be aged 7 - 11 and be the holder of an AKA Racing Licence.

Yamaha KT100J engine, dry weather tyres Dunlop SL1A, wet weather tyres Dunlop KT6SLW1. Competitor must be aged 9 - 13 and be the holder of an AKA Racing Licence.

Yamaha KT100J engine, dry weather tyres Dunlop SL1A, wet weather tyres Dunlop KT6SLW1. Competitor must be aged 12 - 16 and be the holder of an AKA Racing Licence.

Yamaha KT100S or ARC (various specs) engines, dry weather tyres MG AZ Red, wet weather tyres Dunlop KT6SLW1. Competitor must be a minimum age of 13 and be the holder of a B grade AKA Racing Licence that has been endorsed at six race meetings in a Junior National class.

Rotax 125cc Junior Max engine, dry weather tyres Mojo D2, wet weather tyres Dunlop KT6SLW1. Competitor must be 13 - 16 years old and be the holder of a B grade AKA Racing Licence that has been endorsed at six race meetings in a Junior National class.

Yamaha KT100J engine, dry weather tyres Dunlop SL1A, wet weather tyres Dunlop KT6SLW1. Competitor must be the holder of a senior AKA Racing Licence.

Yamaha KT100S engine, dry weather tyres MG AZ Red, wet weather tyres Dunlop KT6SLW1. Competitor must be a holder of a senior AKA Racing Licence.

Various 125cc engines are eligible to be used in this class including PRD Fireball, Parilla Leopard and Rotax Max. Light and heavy categories exist as well as a restricted class for C and D grade drivers. For the C & D grade drivers, restrictor plates supplied by the AKA must be fitted and used at all times. Dry weather tyres MG AZ Red, wet weather tyres MG White for unrestricted drivers and Dunlop KT6SLW1 for restricted drivers. Competitor must be a holder of a senior AKA Racing Licence.

Rotax FR125 Max 125cc engine, dry weather tyres MOJO D2, wet weather tyres MOJO W2. Competitor must be the holder of at least a B grade senior AKA Racing Licence.

IAME Parilla Leopard engine, dry weather tyres MG Yellow, wet weather tyres MG CIK group 2 wets only. Competitor must hold a minimum AKA B Grade Senior Licence.

Any homologated 100cc single cylinder series production air or water cooled engine complying to CIK Formula A or Intercontinental A regulations is eligible. Dry weather tyres MG Yellow, wet weather tyres can be any CIK group 2 wet. Competitor must be the holder of an A or B grade senior AKA Racing Licence.