I recently took a run down to Megacycle engineering in the Melbourne suburb of Keysborough to get a set of slip on mufflers fitted. These are built from scratch by the owner Ken Onus and he likes to have the bike there and fit them virtually as he builds them. Megacycle engineering is an old school engineering works, that builds specialty motorcycle exhaust systems. It's winter Down Under and it was a cold 6C when I left home and was raining for much of the run down there. Ken wanted me there by 7.30am, which meant a 5.30am ish start for me if I wanted to avoid the Westgate Bridge bottleneck. As it was I got there at 7.00am.
Pic below shows a bleak morning.
And the sound - a lovely burble that's not too loud or intrusive. Also the oval shaped pipes look much less bulky than the big round standard pipes.
Ken is the only person I've ever met in Oz who has raced at the IOM - with some success actually.
Ken Onus IOM