31-05-15, 02:52 PM
It isn't that much louder than the huge standard can. Aprilia fitted an exhaust valve purely for noise regs. it remains closed until 6000 rpm to pass the noise tests. (God only knows how they got away with that one!). I disconnected mine because it caused hunting on a steady throttle.. It's the best sounding bike i've ever owned... 8)
If it's broken, it's not fixed.