Originally Posted by aggesaks

Thanks for the info. Well, since the bike was hard to get, I had to order it from Germany (I live en Denmark), so bringing it back is hard (it's not "not an option", just quite a drive), but I can ask them about it - perhaps we can at least share the cost of the first tune-up.
I feel a quite distinct jerk in addition to the added power, and when I come to think of it, it began exactly after my third charge - before the charge I have no recollection of a the jerks, while I noticed them immediately after the third charge.
Don't know if that can tell someone that it might just software related? I did no update during the charging, so the change would then have to be from the charging, which seems unlikely though...