A steering system for a motorcycle includes a head pipe, a steering stem, a top bridge, a bottom bridge, a front fork, and a steering handlebar. A dome-shaped lid has finger recesses permitting the lid to be gripped and rotated with respect to the base. The circuit board built-in connector for connecting an antenna element with a cable is comprised of a circuit board, a ground member, and a cable clamping portion. The light sources may include light emitting diode dies configured to generate different color lights.