Japanese bikes did not have exhaust noise snuffers (servo-controlled butterfly valves in the exhaust pipe(s)) in '07. They may have 'em on newer models. They are a European invention designed to help the machine pass the Euro noise test. Usually takes a dongle with a resistor to keep the ECU from throwing a code when they're removed.
The one on my KTM fried in slow tratfic on a hot day. I was only too happy to shitcan the servo and it's cables in favor of the dongle. When I do the de-cat, the butterfly will be gone, too. They are spring loaded to be open unless the servo pulls them partially closed at 5K rpm where the Euros take their sound-test readings.
It may be a pig, but it's a pig with a rocket in it's ass!