The sound seems normal, i don't detect any difference... its actually quieter than most c 400 ! (mine is much noisier with metallic sounds, especially when cold)
It should idle at 1400 - 1500. the service centre needs to set it right
Eventually the stalling problem was resolved with a software update. Problem well known to BMW. We in Italy don’t have chevron ir exon. Its a idle engine design which was faulty and was mitigated with a software update.
The new engine has a different idling system, based on a turbulent bypass...
i have the same vibrations in my 2021….
did you work on the side of the scooter the same side as the the exhaust ? Could you put a pic zoomed out so that i can see better ?
i want to do the same this week, thx
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