Motion Pro Auxiliary Tank Motion Pro is dedicated to producing the most versatile, unique and durable products for professional and home use. Motion Pro tools are designed to be simple to use, yet durable enough to withstand the harshest conditions. One of their goals is to offer tools of convenience. Do it right the first time with Motion Pro Tools.For use when tuning a motorcycle with the gas tank removed.Includes 4 feet of 1/4" fuel line and an inline fuel valve with a 5/16" tank-side fuel barb and 1/4" engine-side fuel barb.Tank can also be used fo If a 5/16" engine-side fuel barb is required, use inline fuel valve (sold separately).