When I am going sometimes my gascap will leak? It sprays fuel all over the tank and my knees with quite a bit? I have to leave the tank fairly empty to prevent it? maybe 3/4 full?
I stuck a nice big rubber o-ring around the base of the cap where it
mates to the lip of the filler hole. That seemed to cut down on splash
quite a bit.
If you don't already, go and get you an o-ring assortment kit. Those
little beggars come in handy for all sorts of things!
I cut a rubber "washer" from a piece of inner tube and put it on under the original seal. That seemed to sealed up just fine. The o-ring I bought was a 1/16'' and that was too thick and made it diffeicult to get the cap on and off.