Tried to do a search but it's a bit hard to narrow down the topic. So... I was wondering what the general wisdom is about retuning your bike if you fit an aftermarket performance exhaust? I recently highsided my bike and the can is still sound but fairly damaged. A replacement OEM can is twice the price of a Yoshi - so an aftermarket can seems the way to go. BUT!! A can not specifically tuned for the system might result in flat spots or other problems. I hear that most folk with carby'd bikes put in a jet kit with a new can and adjust the float level, but the 9R has plenty enough power for me, most of which I'm already not using!! ? ['029R is a carby bike] SOOO, what are folks' experiences with fitting slip on cans? Must you retune? If yes, should I spend the money on a dyno tune rather than let a mechanic tweak the mixture screws by ear? Does a rejet become almost mandatory with a new can? Is it better to let a performance shop like "Balls" handle the job rather than a more general bike shop? [though I'm reasonably happy with my local shop "Race Replica"] Advice please! Cheers Rob ps. I cannot wait to get this plaster of my right wrist!!!!!!!!!!