Hello
I have a P200E 1982 Vespa that was completely restored two years ago, including new fuel tap but using the existing fuel tap lever (the plastic one).
Here is what I have noticed. When the tank is almost, but not quite requiring it be flipped to reserve, if I let the scooter sit for several weeks, it has on more than one occasion completely emptied itself of gas. The tank is bone dry. The fuel was shut off.
Now, under the scooter, there is no sign of gas. At least not that much gas.
What I have also noticed is that when the tank is full, I cannot turn the lever off enough to stop the flow of gas. It will just run and run.. If the tank is less 3/4 full or less, then I can run it dry. Not sure it's related..
Any ideas as to what is going on ?