Heard this on NPR: http://www.npr.org/2012/06/25/155727756/no-warm-welcome-for-motorcycles-in-national-parks Quote from the story: "AHEARN: Trevino says the park service is hesitant to limit anyone's access. For now, they're still gathering information. So, no tickets or regulations in national parks anytime soon. What they are doing is partnering with motorcycle associations to ask riders to stay in smaller groups, not accelerate excessively and respect park quiet hours. Whether riders cooperate is another question." I've never been a into loud pipes just for the sake of being loud. But I admit I've changed the pipes on most of the bikes I've owned for the sake of getting a "better" sound. Which is of course completely subjective. I put Predator pipes on my Triumph Thruxton and Staintunes on my wife's Ducati Sport Classic. Making those bikes louder than stock. But oh, so good! However I found myself feeling pretty guilty about the noise I was making when I'd ride in the mountains in the front range in Colorado. Embarrassed actually, for disturbing the peace, as it were. I decided then that I'd make sure any future bike I have will be much quieter. I'm not necessarily going to leave stock pipes on, but I'm going to make sure the aftermarket ones I buy are not obnoxious. What do you think? You think we (riders) will self regulate, or be forced out of the parks?