Fullflow petrol tap Harley Davidson from year of manufacture 1975 simple petrol tap made of brass with elegant lever for ON, OFF and reserve. The brass socket, for the petrol hose, has 3/8 inch (0.95 mm) diameter and the outlet is left at the back. The union nut is chrome-plated. Fits Harley from 1975.13/16 inch (21 mm) threaded connection.