doeds anyone have some good plans of a simple go kart frame?

Re-design5 years ago
Check out this website.  It's got some pretty good plans and detailed construction.

The hanging point in building a cart is that you gotta have access to a welder.  It's pretty hard  to build a good cart using bolt together parts.
slednecker (author)  Re-design5 years ago
wow thank you very Much and I have access to a very good welder !

Good suggestion! ;-)