5000 rpm jerking on acceleration

sounds to me like it is surging. Wouldn't have a clue on how to fix it.

You mention you put on 100kms today - was that the 1st 100kms??

You might well want to got back thru the gears slowly accelerating up and beyond 5000 rpms and see if it does it again at the 5000rpm mark.

Perhaps the computer is learning and also trying to make adjustments for the fuel air mix? What's the weather like today - different from other days you've ridden??

I'm just stabbing the air here - but it deff sounds like a software issue.

Try and replicate it....

Hey guys finally problem solved and it took a while.
I've taken the bike to the dealer and they started to check everything ignoring that the peoblem is 100% related to fuel level in the tank. Flushed engine ECU than something else, checked throttle and did a lot of bullshit that manufacturer support made them to do. Finally a week later they came up to checking fuel pressure. Yes it was too low. The reason was blocked fuel filter with something that looked like slime. Filter replacement and tank cleaning - and now I finally have an awesome acceleration with no special effects.
Mechanic and me both think that the substance could be a piece of packaging polystyrol that somehow had got into the tank during transportation or mounting and then been almost dissolved with petrol.

Yeah now I'm struggling with connectivity which doesnt want to be recognised by an ariginal app )) But that is a different story