hi, welcome to the great world of karting!
here is a forums which has basically everything you will every want/need to know abiout karting
www.karting.co.uk basically the popular classes over here are the Tkm's and the Rotaxs. Both are in the 2 stroke catergoires, but there are a few 4 strokes which are starting to get big. In england most of our tracks are between 800-15000metres long which is good for a race. Anything else you wish to know, ask on here or on that forum above!
Sam
:edit: how the hell have i got a warning?
Read your PMs
Seeing as it's in context here, I'll leave your message as is, but we do not allow advertising of other forums.
garcon