My bike feels rough all of a sudden for the past 2 days or so. Maybe it's because I rode without a helmet for a bit. It sounds louder, and I don't mean exhaust. I mean the bike itself sounds louder than it was when I got it 1.5 weeks ago. I have 200 more miles or so until 600 mile service, so I guess everything will be checked anyway. Anyone else notice this or is it just me?