Those of us with the early Sports 1999-2001 have a tank with the fuel pump external and a foam "chin pad" on the top of the tank. It's held on with a pair of steel ball inserts that capture into rubber oval grommets attached to the tank top.   After strapping down a tank bag for over ten years, the chin pad's inner structure deformed and it no longer captured well in the grommets. I've heard of them going missing and "re-contoured" (bent) the pad back to a better fit. While removing the filler