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 High pitched whine from 110km/h

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motor-timothy
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PostSubject: High pitched whine from 110km/h   High pitched whine from 110km/h Icon_minitime1Tue Jul 19, 2022 9:23 am

Since a couple of months my GRiSO has developed a new sound! This started after I cleaned and reinstalled the throttle body but I'm not sure if its related. Low speeds everything is fine but from 110km/h a high pitched whine becomes audible which increases in volume reaching its peak at >120km/h overtaking the engine and wind noise.

Any usual suspects? I would normally think wheelbearing but I had the front wheel bearings replaced at a dealership in March.
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beetle
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PostSubject: Re: High pitched whine from 110km/h   High pitched whine from 110km/h Icon_minitime1Tue Jul 19, 2022 9:43 am


Can you hear it in 3rd/4th/5th gear?




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Pete Roper
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PostSubject: Re: High pitched whine from 110km/h   High pitched whine from 110km/h Icon_minitime1Tue Jul 19, 2022 9:47 am

Are both the drains connected to the airbox and plugged after the TB removal?

If not related to the TB's I'd suggest pulling the bevelbox off and checking that the pinion nut on the input shaft is still tight and secured properly by the tab washer.
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motor-timothy
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PostSubject: Re: High pitched whine from 110km/h   High pitched whine from 110km/h Icon_minitime1Fri Jul 29, 2022 7:25 pm

beetle wrote:

Can you hear it in 3rd/4th/5th gear?




Yes in all those gears the sound is the same
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motor-timothy
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PostSubject: Re: High pitched whine from 110km/h   High pitched whine from 110km/h Icon_minitime1Fri Jul 29, 2022 7:30 pm

Pete Roper wrote:
Are both the drains connected to the airbox and plugged after the TB removal?

If not related to the TB's I'd suggest pulling the bevelbox off and checking that the pinion nut on the input shaft is still tight and secured properly by the tab washer.

Yes to the first. Second I would have to do at a dealership as I have no way of lifting the bike. TLM did replace the carc bearings this winter. Should I stop riding it?
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beetle
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PostSubject: Re: High pitched whine from 110km/h   High pitched whine from 110km/h Icon_minitime1Fri Jul 29, 2022 11:36 pm


motor-timothy wrote:
 Should I stop riding it?


I wouldn't ride it.










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PostSubject: Re: High pitched whine from 110km/h   High pitched whine from 110km/h Icon_minitime1

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