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Does not sound good

 
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fatboy
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Joined: 03 Nov 2011
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PostPosted: Sun Jun 18, 2017 5:17 pm    Post subject: Does not sound good Reply with quote

Horrible noise coming from rear cylinder, sounds like it may be valve train, sort of an RRRRRRRRRRRR.
Hard to tell if it is constant, hear it when throttling off, started today as I was returning from a quick thrash around town.
As the enginge speed decreases so does the speed of the the rattle, no vibration felt through the valve cover
Cam chain tensioner ?
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Gio
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Joined: 17 Dec 2006
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Location: Chertsey

PostPosted: Mon Jun 19, 2017 9:49 pm    Post subject: Re: Does not sound good Reply with quote

fatboy wrote:
Horrible noise coming from rear cylinder, sounds like it may be valve train, sort of an RRRRRRRRRRRR.
Hard to tell if it is constant, hear it when throttling off, started today as I was returning from a quick thrash around town.
As the enginge speed decreases so does the speed of the the rattle, no vibration felt through the valve cover
Cam chain tensioner ?


Teeth missing off the drive or how about a bent pin on the chain causing it to chatter?

I'm guessing btw ;)

On the BB it had that and it was caused by the oil pump drive shaft
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mangocrazy
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PostPosted: Mon Jun 19, 2017 10:44 pm    Post subject: Reply with quote

I'd get on to Griff pronto. Perhaps have a sound clip of the noise ready on your phone...?
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D-Rider
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PostPosted: Tue Jun 20, 2017 4:52 pm    Post subject: Reply with quote

From the limited info I'd not go against your camchain tensioner diagnosis.
I know Dale had to sort this out on his - might be worth discussing with him to see whether it sounds the same.
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fatboy
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PostPosted: Tue Jun 20, 2017 6:08 pm    Post subject: Reply with quote

Thanks all,
Will try and scrounge the use of a stethoscope to pin point the noise, could have sworn there was a slight decrease with the clutch lever pulled in ( those loud cans are not always a blessing ).
Will get it booked in to the local shop for a look see
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Dalemac
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PostPosted: Wed Jun 21, 2017 8:22 am    Post subject: Reply with quote

An audio clip would be useful.

I replaced my cam chain tensioners 5 years ago (I think), because when going from lower revs to higher revs under acceleration I could hear the chain slapping away. My noie was not constant, and I don't recall being able to hear it with the throttle off.
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