I had heard those on someones bike-really loud. I read where you could install it under the tank, but I think that must have been on an america, because I could not get it to fit, at least in the approved position. The instructions said longetivity would be affected if mounted wrong. So....
I wound up putting it in my now empty air box, using an L bracket attached to a threaded hole where the airbox door for changing the filter is. With the side cover on you cant see it....but you can sure hear it
G