Gas tank has a left side petcock opening, and a fuel capacity of 3.8 gallons. It features ISO mount straps and a curved underside with recessed mount holes. Center to center measurement of mounting holes are 13-1/4". Check the tank for flaws and fit before painting. Do not grind or sand the seams or joints. Clean the inside of the tank. It is suggested to pressure test and use a tank sealer. We suggest using Kreem gas tank combo kit to clean, condition, and seal to help stop leaks and prevent corrosion. Check the petcock opening, making sure the petcock can be easily installed. The petcock fitting should be masked or plugged during painting for easy installation of the petcock.