The ornamental design for a portion of a three wheeled vehicle, as shown and described.
FIG. 1 is a front isometric view of my new original and ornamental design;
FIG. 2 is another front isometric view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a front side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a rear side view thereof;
FIG. 7 is a top side view thereof; and,
FIG. 8 is a bottom side view thereof.
The broken dash lines in the portion of a three wheeled vehicle represent the bounds of the claimed design while the broken dot-dash lines are directed to environment and are for illustrative purposes only. The broken dash lines and broken dot-dash lines form no part of the claimed design. Additionally, the unshown portion of the portion of a three wheeled vehicle forms no part of the claimed design.