A storage unit mounted on the rear fender of a motorcycle, and optionally on a low step-up one-piece motorcycle seat, including a storage compartment having a front surface, a bottom surface, left and right side walls, a top surface, and a cavity defined by each of the surfaces; and an access means located on the front surface of the storage unit facing the seat of the motorcycle; where the bottom surface is elongated and arcuate in its elongated axis to conform to the configuration of the motorcycle fender and the storage unit is attached to the fender such that the bottom surface of the storage unit is in contact with a top portion of the motorcycle fender.