BM Tank Foam While driving a motorcycle gradually decreases the fuel level in Baku which is a natural phenomenon. The remaining part of the fuel begins to move in Baku causing a change in center of gravity. The weight of the motorcycle may vary from 6 to 10 kilograms.BM Foam contains thousands of pores that restrict the flow of fuel in the tank. This eliminates the phenomenon of movement of the center of gravity greatly improves handling of the motorcycle.Thanks to its structure reduces the capacity of the Baku only 1%. This technology is used for many years in professional motocross and has been appreciated by many professional athletes.Life of the foam is very long and eliminates the need replacement over the entire operating the motorcycle.