Just asking if anyone has an identical issue? My ‘17 RGU has about 5k miles, still under warranty. When taking it in for the 5k service, I told them I hear an unusual road noise in the 70-80mph range. Hard to describe, but sort of a repeating rrr...rrr...rrr...rrr. Cycles about every half second. Sounds like an old 6 volt pickup turning over to start. Strictly engine or perhaps drive-train specific. If I let off throttle, instantly ceases, and instantly begins again when throttle reingaged. Not a noise from the pavement or from air flow. Dealer says they rode it and didn’t hear it. Just returned from a trip to Arkansas, and on the highway there and back, all I wanted to hear was the purr of that M8, but all I heard was rrr...rrr...rrr... Sure want to get resolved during warranty, and it would be helpful if anyone else who may have experienced this and solved it could give me some direction on what to say next to service dept.