FIG. 1 is a top perspective view of a motorcycle footpeg of the present invention. FIG. 2 is a top plan view thereof. FIG. 3 is a bottom plan view thereof. FIG. 4 is a side elevation view thereof. FIG. 5 is the opposite side elevation view thereof. FIG. 6 is an end elevation view thereof; and, FIG. 7 is the opposite end elevation view thereof. Those portions of the motorcycle footpeg shown in broken lines form no part of the claimed design.