Pepin, 48, has been making vehicles since he was a kid. After building an electric trike using some parts from a kit in 2010, he decided to make his own three-wheeler from scratch. He designed an aluminum chassis, chose an AC motor that could handle the trike's 1,000-pound estimated weight without overheating, and selected a pair of car wheels for the front. He wanted the trike to be rear-wheel-drive, so the back wheel was critical. Conveniently, he found several people who had converted Honda Goldwing motorcycles into standard gas-powered three-wheelers and no longer needed the shaft drive that powered the bike's rear wheel. The shaft drive was ideal for his project, in part because it allowed him to outfit the trike with highly efficient tires. He bought one, originally priced at $3,500, for $106 on eBay.