Carburetor enricher (choke) plunger - seal replacement

Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models

On Dellorto VHB carburetors, the rubber seal on the enricher (choke) plungers may need to be replaced from time to time. The seal is really nothing more than a flat disc of rubber.

Thanks to Bruce Giller for sending me these instructions on how to replace the seals with ³⁄₃₂ inch thick, 6 mm diameter discs that he makes using Viton material. In Bruce's own words:

You'll notice that these gaskets have a taper to them due to compressing the Viton when using a hammer & punch, but this works to our advantage. The plunger holes have a very faint lip so you need to start cramming / easing / pushing the new gasket in starting with the small end. I had to use my bench vise to hold the plunger for it takes two hands to do this. Once the small end is started, it is a simple matter of pushing the gasket all the way in. The final step is to run a dental pick around the outside of the hole to get the gasket to lay under the lip.