FJR Top Gun
Join Date: Jul 2013
Location: near Great Salt Lake, Utah, USA, Sol III
Final drive whine
I think that Rbentnail may have a good answer, above. Some tires whine excessively, especially near the end of the tire life. The Michelins that came to me on my used 2008 had such a road whine, and it was BAD. I was almost sure the bike had some bad wheel bearings. I switched to Pirelli Angel GTs, and instantly the whine was gone. I have yet to hear anything from the Final Drive, but I do not have a 2018, either. If different road surfaces will make any difference in the whine, you may be hearing poor tires whining, and not a mechanical issue.
2008 FJR1300A - Pirelli Angel GT (Spec A) tires, RDL seat, TPMS, GPS digital speedometer (US$25.00).