PM10729
Part-Load Enrichment Valve for a Solex DIDTA carburetor.

This diaphragm administer a small extra quantity of fuel in the mid-rpm range and at partially opened throttle valve.
In this way, a so-called "flat-spot" in the power curve is avoided.

Please note that we photographed this diaphragm from both sides to give you the best view of the exact item but that they are sold, and priced, each.

This product is priced, and sold, as a single unit.
Required quantity per carburetor: 1 - depending on set-up

This is Number 78 in the drawing of the Solex DIDTA carburetor.

This is Part Number PM10729

The Solex DIDTA was also produced as Pierburg DIDTA.
However, these are the same carburetors, just marketed under a different brandname.
Nevertheless, the Pierburg DIDTA can be found HERE.