I don't know much about racing go carts, I havnt even Seen it up close, all I know it's two stroke and I've had motorbikes two stroke so I know all about them. He bought second hand $5,000
Now his kids want one as well. He's pretty good I've watched him race once, he's a petrol head like me. Sold his 65 impala for a house deposit.
Russ
In the US, that sounds like the Rotax class, which use Rotax two-cycle engines (with a vegetable based lubricant oil). I spent a day driving them -- there is a world-class track about 50 miles from me. They are hard to drive fast. They also beat the $%*& out of your body.
CD