The ornamental design for a measurementassistingdevice for a motorcycle, as shown and described.
FIG. 1 is a front view of a measurement assisting device for a motorcycle in accordance with the new design;
FIG. 2 is a left side view of the measurement assisting device for a motorcycle of FIG. 1;
FIG. 3 is a right side view of the measurement assisting device for a motorcycle of FIG. 1;
FIG. 4 is a rear view of the measurement assisting device for a motorcycle of FIG. 1;
FIG. 5 is a top plan view of the measurement assisting device for a motorcycle of FIG. 1;
FIG. 6 is a bottom view of the measurement assisting device for a motorcycle of FIG. 1; and,
FIG. 7 is a perspective view of the measurement assisting device for a motorcycle of FIG. 1.
The measurement assisting device for a motorcycle is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.