All motion is relative motion, because everything is moving. Don't believe me, just ask Einstein. My RE B5 usually attracts attention wherever I park it. Nobody seems to have a clue what it is. Most think it is a restored British bike, because I have British flag stickers on the battery box, and the same cover on the other side. People actually stand around to watch me kickstart it. It sounds great with the carb, pod filter, and the aftermarket pipe.