When you think of Harley-Davidson motorcycles, often referred to as “hogs,” its iconic, rumbling sound is often the first thing that comes to mind. The company at one point famously sought to trademark its bikes’ distinctive sound. It sounds this way because of its unique two-cylinder, v-twin engine design. The engine has a single pin connecting the pistons, originally done to reduce manufacturing costs. To make this unique configuration work the spark plugs were positioned in a 45° arc. So after the first cylinder fires, there is 315° of rotation before the second cylinder fires, and then 405° until the first fires again, and so on, and so on, giving the non-symmetrical distinct potato-potato-potato sound. Owners love that sound, which sets them apart from the rest of the pack of motorcycle enthusiasts. Imagine their collective horror then when Harley-Davidson announced the debut of its first electric motorcycle prototype, called Project LifeWire, which touts zero emissions. W...