ok hear is about the steering, this is what dave from SD said
The motor will drive a sprocket attached to a gearbox that will convert chain drive to the driveshaft. This gear box will also allow forward and reverse, since bikes obviously dont have reverse. The steering is rack and pinion from a dune buggy and runs under the motor with a 2 piece steering shaft.
Also here is the link to the forum
http://www.s10forum.com/forum/f125/sd-builds-a-bagged-go-kart-326165/