Vacuum-controlled fuel valve with four connections for Daelim E-Five, TGB Bullet, X-Race and 50cc Chinese scooters with plastic tank (z. B. newer types REX RS and Peugeot V-Click) and most of Chinese 4-stroke scooters GY6 of 125cc-250cc displacement. Oftentimes a malfunction of this component can lead to misfiring and supply issues. The membrane of the fuel cock sticks and releases an insufficient amount of fuel. The only way to solve these issues in a new item. Please check product photo before ordering and compare to the fuel tap installed on your own scooter. OEM number for comparison purposes: Daelim: DAE-16950-SA1-0140 TGB: TGB GA5539902