There is a 14mm headed bolt that goes thru the lower bulging part of the chaincase cover, (Sorry no pics yet), its not one the ones used to hold the cover on that go around the perimeter. Ive tried to find out what its for as its come loose and spun a little curling the aluminum, but cant seem to find anything showing this mystery bolt. Its down lower in line with the axle shaft, not the reverse mechanism bolt. Before I tear it apart, some insight would be helpful....thanks