I recently recieved a comment from Jason with a link to his website where he has put details of making a very cool wooden go-kart. Whats very nice about this kart is that it uses a pedal crank and chain to drive the kart. I get a lot of emails asking how to implement a pedal drive for the wooden-go-karts listed here. Typically these people want to make the wooden push go-kart first. Then upgrade to a pedal powered wooden-go-kart and finally maybe attach a small engine.
The exact link to the page with the pedal crank drive is: http://thegokart.wordpress.com/2009/10/03/chapter-nine-dont-be-so-cranky/ I hope someone finds this useful and helps them.