1330cc Drivebelt/gear/whining noise - Any possible cures for this?

[TerryTheSpyderRyder]

On my 2017 F3-S, I added a belt tensioner and it really didn't affect the noise but the belt stopped vibrating at certain speeds.

 

[tekslk]

I installed belt tensioneer today and it didnt change anything, Maybe it takes that and the sprocket?

 

[baxter]

what i understand that the belt "tensioner" is for is the harmonic vibration that some exhibit at certain highway speeds and nothing to do with the "whine noise" it sounds so much like a gear whine from years gone by on older vehicles.

 

[BertRemington]

Found the problem: new owner; 1100 miles; 6-speed constant-mesh transmission with straight-cut gears; dry sump overhead cam engine; F3 without RTS sound-absorbing bodywork.

Two suggestions: (1) change to Motul 7100 15W-50 oil (2) find a helmet that better protects your eardrums.

 

[BamaJohn]

I had the same issue as the OP here....Very Loud whine between 45-52mph on my 2020RT (1330 engine, SE6). Service Manager rode it and said "That really IS a loud whine!"
They replace the front sprocket, the fastening bolt, and the drive belt. After about 100 miles, the loud whine came back. Next, they installed "sound-proofing" somewhere around the engine area (I've not yet seen it)...no help. My RT now has 12,000+ miles on it and the whine is now tolerable, but still obvious (I'm sensitized to hear it).
I'm going riding......

 

[BertRemington]

Assembly tolerances, especially thrust washers/bearings, can result in whine differences. I cited the transmission gears. There's also the alternator drive (and the alternator itself) and the cam drive chain and its tensioners. All of which offer opportunities for resonance-induced whine. Your sensitivity to whine will disappear as you age. In the meantime

I'm going riding......