Quote:
Originally Posted by Darksik
I put the same exhaust on my bike, also with the Akrapovic decal, but something I note is that the Ninja lost some power, because with the stock exhaust, the bike could pass the 100km without any problem, and now if I want to pass the 100km I need to accelerate a little more
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What RPM-range are you using to accelerate?
Given the larger diameter tubing and shorter length, I suspect this muffler would enhance high-RPM flow, but may lose some mid-range. Similar to what happened with the Tyga when I installed it. This makes the lean low-end worse, while matching the too-rich factory top-end perfectly. I got a 5-8% power-increase with no re-jetting needed. Off-idle and mid-range had more stumbling. I added more low-end fuel by turning out pilot-screws 0.5 turns.