An aesthetically pleasing and functional axle nut cover assembly for a motorcycle using minimal threaded fasteners and taking advantage of elastic deformation between multiple portions of a mounting bracket to bias the mounting bracket and a cover member to a motorcycle swingarm to reduce vibration and noise. Separate deformations in the mounting bracket occur during assembly of the mounting bracket to the swingarm and during assembly of the cover member to the mounting bracket. Spring portions of the mounting bracket are maintained in deformed conditions when the axle nut cover assembly is assembled.