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Griso 1100 knocking noise

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hughguzzi View Drop Down
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    Posted: 01 Sep 2022 at 10:22
Looking for advice re knocking noise from Griso 1100, hard to tell where its coming from but sounds more like engine than transmission. Apart from all the usual rattles, clutch, transmission. It sounds to me like a very loud tappet or little end knock BUT don't think its either and its not constant or at higher revs/speed that I can hear. - 
It only started after I stalled the bike pulling away with too little revs, on journey home noticed a bit of a knock around 50 mph or if under heavy load. Seems to have got a bit worse recently. Ive adjusted the tappets and all were only very slightly out so not that. No errors on ECU in the diagnostic. 
Can a stall upset the throttle bodies or sensors ? Never had a low octane fuel issue before so dont think its that.  Ideas appreciated to work through simplest culprits first. Cheers Hugh
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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 01 Sep 2022 at 10:38
I wouldn't expect a stall to upset anything in terms of throttle bodies or sensors. Could just load the clutch/gearbox/final drive, but can't think of anything specific.
Can you hear it when on the stand? If so, the screwdriver stethascope trick may help you isolate the source.
Brian.

Better 5 minutes late in this world than years early in the next.
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audiowize View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote audiowize Quote  Post ReplyReply Direct Link To This Post Posted: 01 Sep 2022 at 18:08
If it's the engine and it happens under a heavy load, you should be able to use your clutch with the bike standing still and in gear to load the engine and make it happen.  If you can, then that will point more to the engine than anything else.  If not, then you may want to examine components behind the engine. 

Edited by audiowize - 01 Sep 2022 at 18:21
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hughguzzi View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hughguzzi Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2022 at 09:45
Yes good point, will try that thanks !
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