Even the Akrapovic website urges that installation of their full systems will require remapping. You will notice HUGE gains in overall smoothness as well as a likely large hike in peak power. That new exhaust has dramatically altered your fuel-air mix, and to take full advantage of the potential it offers, you NEED to remap. I've seen a dyno map of a ZX6RR before and after, and trust me, there's gains to be had. For best results, you can invest in some dyno time to get absolute 100% spot-on air-fuel ratios throughout the powerband, but you can also download maps off the
www.powercommander.com site for free (dyno time isn't cheap)...
And if you don't think it's worth looking at even just after adding a slip on, do a quick search of the
www.powercommander.com website, and you'll see that you can get SOME gains adding a PC to a completely STOCK bike! I have heard from a few reliable sources, including the best local dyno shop around, that they have verified this, and that most bikes are a little lean from the factory to get better emissions ratings. Trouble is deciding whether minimal gains are enough to offset the expense involved... but after installing a FULL system, I don't think there's any question.