Like a lot of us, I have the rattling stock gas cap problem. I ordered a flush mount cap from J&P but it’s not so flush. The O ring that came with it seemed a little thick, so I swapped for the stock one. Still looks like crap. The BO tank is curved around the fill port so it’s no surprise a flush mount cap doesn’t sit right. Any suggestions on a better fitting aftermarket cap?

I used a flush mount cap for a sportster on my 18 Breakout, fit is pretty good, sits flush.