Yep, after I had my BA about a year, back around late 2002, and right after I foolishly punched my TOR shorties clean through 'cause I thought my bike wasn't loud enough, I used to get that ringing in my ears too! I'm guessin' it was not only the higher decibel level comin' out of 'em, but also the less than enjoyable somewhat high-pitched "WAAAAAAHHHH" sound comin' out of 'em too that might've caused that. And, after only a ride of about 50 miles or so, that annoying sound would also give me a friggin' headache too!
However, a couple years after that, when I decided to grab my standard Triumph Longs from the corner of my garage and drill out ONLY the first forward baffle on 'em, ultimately giving me a much more pleasant "rumbling" sound and a lower decibel level, the ringing in my ears AND those headaches have pretty much subsided since then, even after hundreds of miles in the saddle.
