Hi Nickcw,
To get the tickover to be louder you would have to decrease the internal restrictions in the exhaust to such an extent that when you blip the throttle or accelerate the noise would be very loud.
As previously mentioned I removed the back boxes and that was loud enough for me, tickover was still quiet (although a little louder than stock)and it had a nice growl on acceleration.
Not an easy decision if you are wanting a louder tickover, good luck,
Ian
