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 Drive train noise GRiSO 1100

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bonny650
Montanarolo
Montanarolo
bonny650

Posts : 16
Join date : 2014-04-19

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PostSubject: Drive train noise GRiSO 1100   Drive train noise GRiSO 1100 Icon_minitime1Sat Jun 26, 2021 1:34 pm

Just noticed a noise at small throttle openings, more noticeable in 6th a clack clack clack which disappears with acceleration or deceleration. First noticed when I removed the cheek pads from my helmet. Rode around the block without a helmet and it seems quite pronounced. Only just over 8000 kilometers on the bike. On input would be appreciated.
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Pete Roper
GRiSO Capo
GRiSO Capo
Pete Roper

Posts : 8111
Join date : 2013-05-29
Age : 64

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PostSubject: Re: Drive train noise GRiSO 1100   Drive train noise GRiSO 1100 Icon_minitime1Sat Jun 26, 2021 3:00 pm

'Face cam shock absorber on gearbox input shaft'. Known issue on 1100's. It's been covered here before, try searching for that it should bring up some links to the issue.
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Evilgarfield
Grignapoco
Grignapoco
Evilgarfield

Posts : 121
Join date : 2021-03-24

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PostSubject: Re: Drive train noise GRiSO 1100   Drive train noise GRiSO 1100 Icon_minitime1Mon Jun 28, 2021 12:44 am

Two things on that:
You can find details on this issue on this document: Technical note 011-2006
Note that I've seen Grisos with SN that are not supposed to be affected by that issue, make the noise nonetheless. I don't know if a bike can develop play over time or if its an issue with Guzzi's book-keeping being lacking and some SN slipping through the QC.

I guess you checked but make sure that the noise comes form the gearbox region and not headlamp. I had the wire connector inside the headlamp shell vibrate at some RPM's and hitting the shell making a sound similar to the one of the face cam shock absorber. The noise disappeared when I taped that into place.
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bonny650
Montanarolo
Montanarolo
bonny650

Posts : 16
Join date : 2014-04-19

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PostSubject: Re: Drive train noise GRiSO 1100   Drive train noise GRiSO 1100 Icon_minitime1Sun Jul 04, 2021 10:23 am

Thanks for the replies. My serial number is definately outside of the numbers at ZGULSC0017M... and build date is after the tech note. I will check the headlight.

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Pete Roper
GRiSO Capo
GRiSO Capo
Pete Roper

Posts : 8111
Join date : 2013-05-29
Age : 64

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PostSubject: Re: Drive train noise GRiSO 1100   Drive train noise GRiSO 1100 Icon_minitime1Sun Jul 04, 2021 9:34 pm

Just because it is 'Outside the range' doesn't mean that it can't be the problem. There was a reason the face cam shock absorber was deleted on the 8V gearboxes.
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