Honda Carburetor Enrichment Diaphram. Fits 1982-85 Honda 16191PC2005. This Diaphram goes to work on accelleration to give the venturi more fuel. It commonly ruptures and causes fuel to leak directly into the intake causing a very rich condition. This is the most common cause of a rich running carburetor in that 82-85 year range. This is New old stock and the rubber is supple and very serviceable. I believe this can be replaced without disassembly of the whole carburetor. 2 available. Price is for one.