Thats where I fill mine too, but somehow it got to over the top wheather it was from expansion or dribbled when I filled it on the top side inside the tank no matter what the cause it is fuel and Suzuki fixed it. Probably because alot of us have had the problem. I owned a Kawasaki 750 Ninja before and it has the same warnings so I was well aware of the possible problems,which are more emissions related then beware of paint peeling do to overfilling. I'm sure everyone knows not to fill the tank till it runs out.LOL Also it seems it is only those of us with 05s having the problem.