The ornamental design for a motorcycletowingdevice, as shown and described.
FIG. 1 is a right side perspective view of a motorcycle towing device showing my new design;
FIG. 2 is a right side elevation view thereof;
FIG. 3 is a left side elevation view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a rear elevation view thereof;
FIG. 7 is a front elevation view thereof; and,
FIG. 8 is a right side elevation view thereof in which a motorcycle is loaded for towing.
The broken line showing of a motorcycle, portions of a motor vehicle, and ground plane are provided for the purpose of illustrating environmental structures and do not form part of the claimed design.