So I have a question about my fuel tank vent. I haven’t done the vent mod yet and I am not having any issues at this time . But when I take off the fuel cap it sounds like it has vacuum and it sucks air in as I remove the cap. Is this normal ? I don’t run in deep water or mud .. maybe up past the floor boards a bit once in a while .. mostly trails and snow riding. So is this something I needed to a fix or is it normal for this machine ... it has over 2000 troubles free miles on it ... and I want to keep it that way .. any thoughts would be great...