Karting??..

I understand entirely. Just to get out and ride, I might take some thicker shoes, thick blue jeans and a heavy jacket. Like you said, you're not trying to set the world on fire. But that neck brace helps if you hit any bumps, or if you're leaning with your head. That was actually one of the first things we purchased after getting the kart. Maybe the guy you got the kart from has one he will let you use for the time being?