Motorcycle design often revolves around the engine. The size, shape, number of cylinders and configuration play a large part in much of what follows. What if you had an X4? 4 cylinders in an X configuration open up new design possibilities and that is exactly what we have here, not only that, it appears to be a 500cc 2 stroke! This is the JJ2S X4 500 by JJS Design. They have developed and patented a new engine and designed a motorcycle around it.
