How far from bottom are the idle air screws?
Number two and three are ~1.5 turns out, number one (closest to the front) some 3/4 turns. It is exactly as it was before, as weather has been really awful recently and I can not ride the bike to warm it up for a re-sync at a lower setting. Since I have been into the MAF (and removed, later replaced the fuel filter) my engine feels to be out of tune. Since both things would affect the overall mixture I just hope, I did not introduce some dirt into one of the injectors, when I ran the engine without the fuel filter for a very brief period of some seconds (basically checking, if cold engine idle improves without the filter).