Re: Gas tank / Petcock questions
Check with the vendor you bought the tank from first of all.
Externally threaded petcocks have been used for years on motorcycles. You might want to check a local Japanese motorcycle shop if the seller of your tank can't help you.
If you're fortunate enough to have a motorcycle salvage yard in your town you might find one to fit there.
Typically those types of valves (petcocks) have a reserve position with two inlets in the tank.
If all else fails and the bung isn't internally threaded you could run a 1/8" pipe tap into it and use a standard NPT petcock or use a 10mmX1 tap and use a kit petcock with a gasket.
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Last edited by 2door; 08-05-2013 at 08:26 PM.