The ornamental design for a motorcyclefueltankcap, as shown and described.
FIG. 1 is a perspective view of a motorcycle fuel tank cap;
FIG. 2 is a front view of the motorcycle fuel tank cap of FIG. 1;
FIG. 3 is a top view of the motorcycle fuel tank cap of FIG. 1;
FIG. 4 is a rear view of the motorcycle fuel tank cap of FIG. 1;
FIG. 5 is a right side view of the motorcycle fuel tank cap of FIG. 1;
FIG. 6 is a left side view of the motorcycle fuel tank cap of FIG. 1;
FIG. 7 is a bottom view of the motorcycle fuel tank cap of FIG. 1; and,
FIG. 8 is a perspective view of the motorcycle fuel tank cap of FIG. 1 shown on a reduced scale and mounted on a motorcycle (shown in phantom). The portions of FIG. 8 shown in phantom lines do not form a part of the claimed design.