I hope to some day try a shifter cart. I lost a link in my favorites and if anyone knows where I got it, tell me Pleeeze! Anyways it was a video of this guy that mounted a 1100cc Yamaha on a homebuilt chassis and although crude looking and scary, my heart rate went up watching! He was on a killer karting track, and this thing would accelerate like a bat out of (Bleep!) and could drift until he lifted his foot! Ring a bell?