The design is for the particular and distinctive shape of a motorcycle gas tank primarily for use as a mailbox for the receipt and delivery of mail.
FIG. 1 is a front elevational view of a motorcycle gas tank mailbox showing my new design;
FIG. 2 is a side elevational view thereof, the opposite side is a mirror image;
FIG. 3 is a bottom plan view thereof; and,
FIG. 4 is a front elevational view with the lid in an open position.