The ornamental design for a motorcyclediskbrakelock, as shown and described.
FIG. 1 is a right side elevation view of the motorcycle disk brake lock, embodying my new design, the left side elevation view being a mirror image thereof;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a top, front and right side perspective view thereof; and,
FIG. 6 is a top, rear and right side perspective view thereof.