We won't reinvent the wobbly wheel here. Below are places to read up on what a cyclekart is. All known variants of the guidelines are here. If you can't figure it out from all this.. you shouldn't be building one.
Where not to go:
Of course, in the endless web and cyclekart sites all over the place, a list of places to avoid if you plan on attending any actual meet that cyclekarters adhere to.
Furthermore they have a google site called cyclekarts too where they try to govern the world on what a cyclekart, something they didn't start at all... is. All the other misfit toys who didn't (um... couldn't and wouldn't) figure out what cyclekarts really were, and got mad... gather there to bash everyone else. There's also a mess of other dark & questionable things behind the scenes. (ask me, I'm happy to share. It's all public information and I was there for every part of it... I've every text and email too.)