ROTAX MAX
 

• Ages 16 years and over
• Blue plates/White numbers
• 162kg minimum weight
• Rotax engine
• 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.

FORMULA 125 ICC UK

• Ages 16 years and over
• Green plates/White numbers
• 180kg minimum weight
• 125 6 speed ICC gearbox 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.

JUNIOR TKM

• Ages 16 – 16 years
• Blue Plates/White Numbers
• 129kg minimum weight
• Restricted BT82 engine
• 100cc 2 stroke 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.

 

FORMULA JUNIOR GEARBOX

• Ages 13 – 16 years
• Red plate/White numbers
• 155kg minimum weight
• 85cc 6 speed engine

 

Uses an 85cc Honda or TM engine with 6 gears.  Four wheel braking offers the youngsters an experience close to a single seater race car.  Not raced at many clubs but there are two national series.

 

FORMULA 250 NATIONAL

• Ages 16 years and over
• 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.

 

JUNIOR MINI MAX

• Ages 11- 16 years
• Yellow Plate/Black numbers
• 135kg minimum weight
• Rotax engine (restricted)
• 125cc engine
• Electric start/clutch drive

 

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

 

COMER CADET

• 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.

 

JUNIOR ROTAX

• Ages 13 – 16 years
• Red Plates/White numbers
• 148kg minimum weight
• Rotax engine
• 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.