Ripped from the WSKC site
KART CLASSES
WSKC - WHERE CHAMPIONS ARE BORN
Although we allow most types of kart to practice at WSKC, not every Cadet, Junior and Senior class races here. The classes are listed in order of popularity as follows:
Cadets - from 8 to 13 years old
Comer Cadet
Uses a 60cc sealed 2-stroke Comer engine so engine rebuilds have to be carried out by an approved service agent. This is the class used for the premier championships and is run by most clubs. The engine and carburettor adjustments need to be quite precise so having a competent parent/mechanic is a distinct advantage!
Honda Cadet
Uses a 4 stroke, GX160 engine which is ideal for beginners. The long life engines are very low-cost, do not have to be sealed, but have to conform to a technical specification. Honda Cadet has a national ABkC championship.
WTP Cadet
Is a different model of 60cc 2-stroke with the latest B5 engine having an electric push-button start. This is commonly known as TAG - for Touch-and-Go. Like Comers the engines are sealed and have a log-book.