Go-kart racing is something a lot of us enjoyed as a special treat when we were kids, isn’t it? For a birthday day out for you or a friend – what a fun thing to do, huh? But where most of us probably haven’t donned a helmet for some time, there are scores of grown-ups out there still obsessed with it…

But they’re not just happy to squeeze into the seat and whizz around the track like we used to when we were twelve. Oh no. They have to try and ‘evolve’ things. Tinkering with the engines and fiddling with parts. They’re messing with the set-up. With varying degrees of success!

The go-kart you’re about to see here is just crazy. It’s got a six cylinder engine and has new wheels. But they’re not equally sized. They back ones are about three times the size of the front ones! No wonder this thing handles impossibly… Check it out, it’s insane: