Fuel Pump Vacuum Gas Valve Switch for GY6 50cc up to 300cc Motorcycles Scooters ATvs GoKarts Mopeds VACUUM FUEL PUMP SWITCH for GY6 Engines This is a type 3 vacuum operated fuel pump used on many liquid cooled engines. Bolt Hole Spacing: 76mm (3) Height: 34mm (1.35) FAST FREE SHIPPING