Over 16 years of age
Green plates/White numbers
180kg minimum weight
125cc 6 speed engine.

This is a very popular gearbox class, although a little more expensive than a direct drive class, they can be surprisingly economical to run.  The 125cc water cooled engines have 6 gears, sequentially operated like a motorcycle using a gear lever mounted next to the steering wheel.  0-60mph times are less than 4 seconds, top speed is 90mph on short circuit.  This is an ABkC Championship class run by the NKF.

Over 16 years of age
White plates/Black numbers
195kg minimum weight
250cc single cylinder engine.

This is the most powerful short-circuit class using 250cc single cylinder motocross 5 speed engines.  The karts are often equipped with large full width nose cones and wings, especially when used on long circuits.  Top speeds are 100mph on short circuits.  The NKF holds the ABkC National Championships.

Over 16 years of age
Red plates/White numbers
170kg minimum weight
Saxon or Biland Listed engine.

Commercial class from Saxon motorsport.  Quick 250cc engine which is twin cylinder, liquid cooled, 4 stroke.

Over 16 years of age
Blue plates/White numbers
162kg minimum weight
Rotax 125cc Engine
Electric start/clutch drive

The senior equivalent of Junior Max, with a very powerful 125cc TAG engine.  The maximum revs are limited electronically and the engines are sealed to prevent unapproved tuning.  They are designed for low maintenance.

Ages 11 - 16years
Red plates/White numbers
148kg minimum weight
Restricted Rotax 125cc Engine
Electric start/clutch drive

One of the most powerful junior classes with a top speed of about 70mph. Uses a 125cc 2-stroke TAG engine.  All Rotax engines are sealed and have a log- book showing the service history.

Ages 11 - 16years
Yellow plates/Black numbers
135kg minimum weight
Restricted Rotax 125cc Engine
Electric start/clutch drive

This is the lowest powered class of the Rotax family and uses a very restricted 125cc 2-stroke TAG engine.  The engine is sealed and has a log-book showing the service history.

Ages 11- 16years
Blue plates/White numbers
129kg minimum weight
Restricted 100cc 2-stroke BT82 Engine
Direct or clutch drive

Popular traditional kart class using a BT82 piston port engine to a strict non-tuning regime.  Junior engines have a restrictor between the carburettor and engine to limit the power.

Ages 8 – 13 years
Yellow plates/Red numbers
100kg minimum weight
GX160 Sealed Honda Engine

Uses a 4-stroke long life low-cost Honda engine.  Runs at most clubs and also has a National ABkC championship in the Super 1.

Ages 8 – 13 years
Yellow plates/Black numbers
97kg minimum weight
60cc comer sealed engine with clutch

Uses a 60cc sealed 2-stroke Comer engine so engine rebuilds have to be carried out by an approved service agent. This class is used for the premier championships and is run by most clubs.