Abstract: A motorcycle headlamp assembly has a headlamp for emitting a beam and a cover with a spherical shell that encloses the headlamp. The shell has an aperture through which the beam is emitted when the headlamp is operative. A shutter closes the aperture when the headlamp is inoperative. The shutter lies closely adjacent the inner surface of the shell so that an outer surface of the shutter closely conforms to the inner surface of the shell. The shutter is mounted for pivotal movement about an axis coincident with a center of the shell such that the shutter pivots about the axis between closed and open positions. In its open position, the closely conforms to the inner surface of the shell.