Followed the instructions but don;t remember if I out in 3 holes or four. I do know there is one at the 12 o'clock position (when viewed from sitting in the saddle) and another at the 3 o'clock position -- I see those when I fill up, almost always standing on the left side of the bike. I'm sure there's at least one more on the left side -- either 1 at 9 o'clock or 1 each at 8 o'clock and 10 o'clock. Whether it's one or two on the left, the important ones are the other two -- they get covered with fuel last.