Hi folks Yesterday for the second time I noticed a strange side noise on my muscle, which I don’t think belongs to it. It sounds like a quiet cry, like when you blow over the edge of a half-full bottle. Unfortunately, I can’t describe it better The sound appears obviously only when the machine is right at temperature, like after a longer motorway ride in warm weather. I could at least limit it so far that it is open This is only possible when driving over 20-30 km/h. It’s gone. Even if the machine has stood and cooled down for a while. Unfortunately, it’s difficult to locate and judge the whole thing with a helmet, and having the ear on the machine without a helmet is a bit too critical for me. Does anyone have any idea what this could be or has a similar problem? Greetz HD-Grobi p.s. Oh yes, since I am closed with the Mouth driving I can exclude that the noise is caused by wind motion over my hollow body