Hi, I just bought a spitzen sound auspuff from german ebay. no 260285035306 my german is nill, I think its some kind of silencer, they said it will change the exhaust sound of the bike, mine sounds a bit like a bee farting in a milk bottle after a night out on the necter. My thoughts are when I fit it on, will I have to fiddle around with the carb tuning,,all the best,k