Petcock, fuel valve, with 3 positions: on, off, and reserve. Specifically for Ambassador, 1969 to 1972 V7 Special, Eldorado and 850GT fuel tanks, these can also be used on V700 fuel tanks but if you are using the original steel generator covers the right side lever must be shortened slightly to clear. The manufacturer claims these valves are resistant to 10% ethanol, but obviously, ethanol will damage the rubber so we recommend avoiding it.
Note: Due to the variety of fuel additives on the market, different environmental conditions, and multiple fuel additives being used today, we no longer offer free warranty replacements on these valves. We suggest you avoid ethanol and all other supplemental fuel additives including stabilizers, cleaners, and octane boosters. If you don't ride the bike, drain the tank.
Note 2: Installation tip: Some people have reported that the internal gasket has turned with the handle when these petcocks are new - in order to prevent that, we suggest spraying a lubricant into the valve and working the valve back and forth to loosen them up prior to installation.
Note 3: Do not over-tighten the valve to the fuel tank. In addition to potentially damaging your valuable antique fuel tank, you also run the risk of snapping the valve off at the threads. We recommend use of our petcock indexing washers to align the valve without the need to over-tighten and sqeeze the gaskets more than required to seal against leakage. See related items.