"This guide will teach you the basic aspects you'll need to consider to make yourself a road-worthy gravity-powered vehicle. Full suspension on gokart wheels, driver restraints, a ridgid frame with roll bar, and balanced drum brakes are features of the example kart I've built that weighs in at under 100lb."
Of course, this thing only works downhill and is useless as a practical means of transport. But could we please get rid of the Indy 500 and the Formula One circus and race these karts instead? Seems like a lot more fun to me. Previously: DIY replicas of 1930s race cars.