Motorcycle

FIG. 1 is a front and left side perspective view of a motorcycle showing our new design; FIG. 2 is a front and right side perspective view thereof; FIG. 3 is a front elevation view thereof; FIG. 4 is a top plan view thereof; FIG. 5 is a rear and left side perspective view thereof; FIG. 6 is a rear elevation view thereof; FIG. 7 is a left side elevation view thereof; and, FIG. 8 is a right side elevation view thereof. The broken lines represent portions of the motorcycle that form no part of the claimed design.