I had an 81 Virago 750 crane that needed a complete overhaul. After the overhaul, fuel will still flow when the valve is in the ON or RESERVE position, even if there is no vacuum applied to the valve. However, nothing came out of the tap, so I think this is a partial win. Hope others have better luck. I have a used clockwork faucet that works fine now. If that doesn't help, I'll try the conversion kit from K&L Supply: https://www.amazon.com/80-83-KAWASAKI-PETCOCK-REPAIR-18-2698/dp/B07FVV46QT/ref=sr_1_2 ?keywords=k %26l+18-2698&qid=1566147980&s=gateway&sr=8-2
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