This Gas Tank with Locking Gas Cap, Key and Petcock is off a 1978 KZ400D Kawasaki Motorcycle.  The tank is solid with no soft spots or leaks.  The inside of the tank has some light surface rust and could use a cleaning.  The outside of the tank has two shallow dents on the upper right side as shown and the paint has some scratches, chips in the paint and minor bubbling.  Please see the pictures below and contact me with any questions.