About three years ago I replaced all the taps on my bikes with unleaded/ethanol suitable ones, the chrome lever type. Well that didnt work, after about 18 months or so they all buggered up. The usual problem of the rubber inserts swelling up blocking the fuel flow.
Fuel taps are a pet hate of mine, I dont give a rats backside about originality I just want taps that work and dont leak. My Guzzi's have BAP type taps and one of them I have had for 25 years and the taps on it dont leak and are as easy to turn on and off as the day they were new.
So two years ago I put a set of BAP style taps on my A10, they are Italian made Paioli taps and they are perfect, easy to turn on and off and dont leak and no sign of any deterioration of the rubber. I have just fitted another set to my B33.
So I recommend these taps, they seem to be able to withstand at least unleaded fuel, dont leak and are easy to operate. If anyone is looking for taps give them a try.