19-10-13, 04:04 PM
As red98 said, used to be a common mod in the 70s & 80s (Zs, GSs, CBs etc). With a 4-1 pipe, up-jet on the mains, would increase performance and introduce a lovely induction roar for relatively little money. Everybody used to do it, but fuel injection on modern bikes requires different kind of tuning (PCs etc), so not so common these days. If I had a Fazer 600, I'd definitely be thinking about doing it.