Just out of curiosity, what type of kart are you planning on building? I happen to have attached a 500cc 2 stroke to a racing kart. I went to third gear twice and havent been able to bring myself to run the thing again. Im too afraid to drive it anymore and now it just sits in the back of my garage.

.
I also have an 80 shifter that I have been taking to the track this season.
Danny