So Im putting my bike back together from my stereo install. Put the tank back on, plug in quick connect gas fitting and it starts leaking. I disconnect it and there is still a drip. I look up into it with a flash light and see an O ring. End up draining the tank completely and turning the tank upside down on my workbench. Replace O ring, put back on and still leaking. Take back off and fiddle with the check valve. End up pulling it straight out, looked fine, reinsert. I have never messed with these fittings other than connecting and disconnecting so I know nothing about them. So I have another o ring in place, and it leaks. But only when disconnected. When I connect the fuel line, it doesnt leak, but now bike wont start. Is there a right or wrong way to have the check valve in place?? Why is it leaking when the line is disconnected?