Replacement diaphragm for the pump jet pump on the Dellorto DHLA series carburetors.
The original diaphragms now start to suffer from age and the ravages of aggressive modern fuels which causes the "rubberized textile" material to harden and even crack, causing erratic running of the engine and fuel leaks.
Replacing the diaphragm is then the only sensible option.
Please note that there are different versions available of this diaphragm.
In this particular one, the metal disc, visible in the photograph, measures some 25.1 mm in diameter.
The solid brass cam is some 13.3 mm tall, measured from that same disc.
Required quantity per carburettor: 1
This is item number 76 in the drawing.
This is an authentic Dellorto diaphragm, produced at the Dellorto factory in Italy, using two layers of tissue provided by Effbe.
This is Dellorto Part Number: 7515
An overview of the available DHLA diaphragms, including the key dimensions, can be found HERE.