Comer Cadet

Age: 8 - 12 years

Weight: 97kg (S60 = 95kg)  (Min. Kart & Driver)

Engine: 60cc Comer engine with Clutch. Recoil starter.

WTP Cadet

Age: 8 - 12 years

Weight: 100kg for 2005 regs (Min. Kart & Driver).  The new B5 TAG engine, when approved, will raise the weight to 103kg, and the existing B1 engine will fall to 93kg minimum weight.

Engine: 60cc WTP sealed engine, clutch.

Junior TKM - 2S

Age: 11 - 16 years

Weight: 129kg (Min. Kart & Driver)

Engine: TKM BT82 100cc restricted Piston-Port engine, optional clutch.

Jnr TKM Inter - 2S

Age: 11 - 16 years

Weight: 144kg (Min. Kart & Driver). Minimum driver weight 62kg.

Engine: TKM BT82 100cc restricted Piston-Port engine, optional clutch.

Junior Blue

Age: 11 - 16 years

Weight: 125kg to 155kg (Min. Kart & Driver). See regulations.

Engine: IAME Linx 100cc, clutch, driver/weight restrictors.

Junior UK Clubman

Age: 11 - 16 years

Weights: 125k - 140kg (Engine dependant) Min driver weight from 60kg.

Engine: Parilla Leopard 125cc or piston-port engines (restricted)

Jnr Rotax MiniMax

Age: 11 - 16 years

Weight: 135kg (Min. Kart & Driver)

Engine: Rotax FR125 Junior Max (restricted)

Junior Rotax

Age: 13 - 16 years

Weights: 148kg (Min. Kart & Driver)

Engine: Rotax FR125 Junior Max

JICA
(Junior Intercontinental A)

Age: 13 - 16 years

Weight: 135kg (Min. Kart & Driver)

Engine: CIK 100cc piston-port engine with clutch.

Honda Cadet

Age: 8 - 12 years

Weight: 100kg (Min. Kart & Driver)

Engine: Honda Gx160 160cc four-stroke engine with clutch.

Junior TKM - 4S

Age: 11 - 16 years

Weight: 140kg (Min. Kart & Driver)

Engine: TKM 200cc 4-stroke junior version, clutch, restrictor.

Honda Junior

Age: 11 - 16 years

Weight: 145kg & 152kg (Min. Kart & Driver)

Engine: 2 x Honda Gx120cc (145kg) or 2 x Gx160cc (152kg), clutch.

Honda Junior Heavy

Age: 11 - 16 years

Weight: 160kg. Minimum driver weight 62kg.

Engine: 1 x Honda Gx120 & 1 x Honda Gx160 4-stroke clutched engine.

Junior Gearbox

Age: 13 - 16 years

Weight: 155kg. (Min. Kart & Driver)

Engine: TM85 MC and Honda CR80 engines, 6 speed.

Age: 16 years +

Weight: 155kg (Min. Kart & Driver)

Engine: Generally 2003 & earlier rotary-valve engines, 24mm carb.

Formula TKM - 2S

Age: 16 years +

Weight: 148kg & 163kg (heavy) (Min. Kart & Driver)

Engine: TKM BT82 115cc piston-port engine with optional clutch.

Rotax Max 125

Age: 16 years +

Weight: 162kg (Min. Kart & Driver)

Engine: Rotax FR125 Max sealed two-stroke engine with clutch.

Rotax Max 125 Heavy

Age: 16 years +

Weight: 177kg (Min. Kart & Driver)

Engine: Rotax FR125 Max sealed two-stroke engine with clutch.

Rotax Max 125 Heavy Veterans

Age: 40 years +

Weight: 177kg (Min. Kart & Driver)

Engine: Rotax FR125 Max sealed two-stroke engine with clutch.

Formula Blue

Age: 16 years +

Weight: 125kg to 155kg (Kart & Driver)  See regulations

Engine: NKRA listed engines

Formula Libre

Age: 16 years +

Weight: 155kg (Kart & Driver)

Engine: 100cc direct drive. (Open grid for club racing)

ICA
(Intercontinental A)

Age: 16 years +

Weight: 150kg (Min. Kart & Driver)

Engine: Reed valve 2-stroke engines (maximum 100cc), 24mm carb.

Formula A

Age: 16 years +

Weight: 150kg (Min. Kart & Driver)

Engine: Rotary or reed valve engines. Latest models.

Formula TKM - 4S

Age: 16 years +

Weight: 162kg & 175kg (heavy) (Min. Kart & Driver)

Engine: TKM 200cc 4-stroke, clutch

Honda Senior

Age: 16 years +

Weight: 175kg (Min. Kart & Driver)

Engine: 2 x Honda Gx160 160cc 4-stroke engines with clutch.

Age: 16 years +

Weight: 180kg (Min. Kart & Driver)

Engine: 125cc reed valve engines with 30mm carburettor.

125 Open

Age: 16 years +

Weight: 185kg Short circuit (Min. Kart & Driver)

Engine: 125cc reed or rotary valve engines.

210

Age: 16 years +

Weight: 185kg Short circuit & 190kg Long circuit (Min. Kart & Driver)

Engine: Villiers 9E (or replicas) air-cooled 2-stroke engines.

250 National

Age: 16 years + (17 years + for long circuit)

Weight: 195kg Short circuit & 200kg Long circuit (Min. Kart & Driver)

Engine: 250cc single-cylinder engines with 5 speed gearbox.

Formula 250E

Age: 16 years + (17 years + for long circuit)

Weight: 210kg (Min. Kart & Driver with Bodywork)

Engine: 250cc twin-cylinder + Rotax 257 + 125cc twin engines.