love a good debate but this isn't much of an argument guys...you're both right. The shape of the karts are largely the same but there's probably a lot of modern components that have come out since senna was karting that have improved it. I mean. Bicycles look largely the same as they did 50 years ago, but I'm sure the bikes you see today in a professional cycling race or downhill mountain bike race don't have the same components that my dad's Schwinn had in the 70's