Hi all, I've recently had an aftermarket exhaust put on my 2003 gs500. Its given me the desired noise that i wanted from it, but in doing so, it has produced a slight "miss" when accelerating and during idle ( wasn't a "miss" with old exhaust). There is also some light back firing when gearing down. It doesn't seem like its lost any power. does anyone know of someone good around the south of Sydney that can help me with re adjusting the carby's to suit this new exhaust? thanks.