Petcock bolt spacing

[Black 550 L]

can anyone tell me what bolt spacing is on 1980 550 L I need a new one It has a vac. one on it now should I go with a manual or a vac. It runs fuel all the time just want to know which is better Thanks

[80GS1000]

The bolt spacing is 50 mm for 1980 model 550/750/850/1000/1100. If you haven't had any problems with your existing vacuum petcock and it flows enough fuel for your needs you may want to leave it alone. If you're getting symptoms of wide open throttle fuel starvation like stumbling, you may want to look into getting a manual Pingel petcock. Make sure you get the 50 mm adapter plate so it'll bolt up to your tank. I have one and it's great.

[Black 550 L]

I am pretty sure it is bad because it flows fuel even when the bike is not running that is why I was asking what is best? I didn't think it was suppose to flow fuel unless the motor was running creating vac. Is this correct?

[chef1366]

I have the Petcock you need for sale. Almost new!
I took it off for a Pingel pet rock.
Works great
Going fast!