I have a 2018 Rebel 300. A few months ago I noticed a coarse, loud buzzing noise, for lack of a better description, coming from the front of the bike somewhere. After much prolonged investigation, I seem to have narrowed it down to the headlight housing, but I am not totally sure about that. The noise is definitely increases with increasing rpm, and seems heat dependent also, first showing up in the summer and being worse when it's hot. The dealership has found nothing wrong with my bike. Has anyone else experienced this?