101 Octane Universal Vacuum Operated Fuel Pump. Fits any scooter with 1/4" fuel lines and can be used when to convert from an electric fuel pump.
The brass fitting is for the vacuum connection. The fuel inlet and outlet are marked by arrows in the direction of flow on the underside of the pump.
Overall Width (including mounting brackets) : 67.5mm
Overall Height (including brass fitting): 40.25mm