[Motofool]

Just published by Motorcyclist magazine and in complete agreement with my long-sustained and humble opinion:

"You’ve had your new bike for barely a day, and already your riding buddies are telling you what’s wrong with it. According to them, the cutting-edge suspension, brakes, exhaust, and tires are actually cheap, disposable junk that’s holding you back from fulfilling your true destiny as a canyon-carving god. You know they’re full of it, right?
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Everybody seems to want more performance, and replacing the stock exhaust with a free-flowing aftermarket system has been a popular way to get it. A couple of points here: First, today’s stock exhausts are incredibly good, and the gains with just a simple slip-on have become razor thin (if you just want it to be louder, say so; don’t lean on the performance crutch).
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The best advice is simply to wait and experience the bike in bone-stock form before throwing down for performance upgrades. And remember that the ultimate performance limiter is the component holding the handlebars. Unless your last name is Hayes or Hayden, odds are you can’t use all the performance your bike has anyway. Rather than pop for more horsepower, invest that money in a riding school."

http://www.motorcyclistonline.com/ho...g_the_upgrade/