hmmmmmm
Hi.. well without ECU mod, you will not gain much, neither you will loose much. Yes loosing is also an option.
If we are talking here about exhaust mod, if i want to be fair, I would go with Lamonstr PIPE first.. for first year it was loud enough for me. Akrapovix is nice, but change in sound, is very very little.
Lamonster pipe, creates some special efect, I rYde faster - in my mind not in real, coz its louder, and it "barks" to the exhaust because of high fuel octans..

maybe you will get 3-4-5kmh extra in TOP speed. But same I will get once I will lose those 20extra kilograms I have now extra since I have bought the bike

I am not sure if my answer is any help for you. I have also K&N filter, and again same story,, i have it because I just want to have it, its not because of any extra power..
Be safe out there.. if you have same rYding style like I do have,, well then god bless you

))))
Thank you for your efforts with this testing. This is one of the videos that I have been waiting for because I am trying to decide if I want to do anything with my exhaust. What set-up gave you the best performance (fastest 0 to 60 time) and fastest top speed. I have watched your other videos and lets just say you and I have the same "driving style" :thumbup: