A rescaled pictorial of all the parts in the Solex 40 NNIP Carb.
Some of the parts identified may not come in an overhaul kit, especially the seals. It depends on who supplies the kit.
If replacing diaphragms through age replace all - especially the economy device diaphragm, since as its name says this controls the amount fuel used and the economy of the engine.
Also note on some carburrettors the cold start device may not be as shown, instead in item 19 there maybe just two holes. Item 19 needs to be mounted with the holes horizontal if that is the case.