Hi guys , I am a new member. I owned a 1995 Diversion XJ900S for 20 years and the shaft drive was as quiet as a mouse. I now have a 2015 FJR 1300A and I am really pissed off with the whine coming from the shaft drive when cruising at 100kph on freeways. WTF has Yamaha done?
Some will say that oil is oil, and I do not wish to start a debate. I just report - Yamaha has felt it necessary to issue a special hypoid gear oil, especially for the FJR (and other) Final Drives. I can't guarantee that it will "fix" the whine, and it is pricey, but one bottle will refill the FD several times. I consider the cost as acceptable, then.
Yamaha says the oil is formulated to withstand the shearing forces that are typical of hypoid gears, and that the oil does not degrade much between scheduled changes. I have not noticed any serious whine from the FD on my 2008, but maybe I just expect some noise there, in place of chain noise.
If your FD oil is dirty or discolored, it's probably due for a change anyway. You can pull the fill/inspection plug to check, without losing any oil back there. The correct oil level should be at the base of the threads, when you pull the filler plug. The bike must sit on the center stand for at least thirty minutes, with no
wheel rotation, to read the FD oil level correctly. The same applies to a FD oil change there. The wheel must not rotate during a FD oil change, or the FD will get overfilled. The excess oil will get vented onto the wheel, sometimes making the new owner think there is a leak when there is not.
The Part Number for the oil is on the label, and the dealers or the on-line shops can get it for you if needed. Prices will vary. HTH.