When we last left off, my cheap go-kart didn’t really work. I’d sourced everything and assembled it all, but when it came time for the moment of truth—the first test drive—nothing happened besides a ...

[Peter Holderith] has been on a mission to unlock the full potential of a DIY quad-motor electric go-kart as a platform. This isn’t his first rodeo, either. His earlier vehicle designs were great ...