Whining noise with front/rear sprocket + chain - MVAgusta.net
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post #1 of 29 (permalink) Old 10-28-2016, 11:16 PM Thread Starter
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Whining noise with front/rear sprocket + chain

So I've just put new chain, and front/rear sprockets. Stuck with standard sizing for everything and a DID chain.

Did a couple of round the block rides and checked torque settings etc... all is well. Went for a little ride on the open road and there is a whining noise that comes on about 80/90kph... up to about 120. The only way I can explain it is it's like a synchromesh sound.

It's only when the power is on, as soon as you back off the throttle it disappears.

I've triple checked chain tightness and nothing is getting hot (eg hub etc).

Any ideas on what this could be or where to check?






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post #2 of 29 (permalink) Old 10-29-2016, 01:15 AM
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Hi Simon.
Must be quite loud if you can hear it at those speeds over the wind & engine noise.

Is it possible that the supplier has supplied a 525 sprocket or sprockets?
The chain, I assume, is a 530 pitch, yes?

That's all I can think of.

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post #3 of 29 (permalink) Old 10-29-2016, 01:21 AM Thread Starter
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Hi Simon.
Must be quite loud if you can hear it at those speeds over the wind & engine noise.

Is it possible that the supplier has supplied a 525 sprocket or sprockets?
The chain, I assume, is a 530 pitch, yes?

That's all I can think of.


Standard is 525. Sprokets forum sponsor... got the chain from the local MV dealer. Will check that when home again.




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post #4 of 29 (permalink) Old 10-29-2016, 01:39 AM
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Thanks.
Now, looking at the picture you supplied, and as I don't own a Brutale I am not certain if this is true for a Brutie but it is for an F4 - when adjusting the tension of an F4 chain the centre of the chain is supposed to be 6mm below the lowest point of the lower swingarm guard.
Yours looks to be quite a bit above that making me think that the chain may be tensioned too tightly.

I have a suspicion that the Brutie chain is set with a different method to the F4 but I thought I'd point that out.

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post #5 of 29 (permalink) Old 10-29-2016, 01:50 AM Thread Starter
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Originally Posted by The_castle View Post
Thanks.
Now, looking at the picture you supplied, and as I don't own a Brutale I am not certain if this is true for a Brutie but it is for an F4 - when adjusting the tension of an F4 chain the centre of the chain is supposed to be 6mm below the lowest point of the lower swingarm guard.
Yours looks to be quite a bit above that making me think that the chain may be tensioned too tightly.

I have a suspicion that the Brutie chain is set with a different method to the F4 but I thought I'd point that out.


Yea same.. but manual says 50mm from the swing arm and I have already adjusted to 60 to see if it makes a difference.




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post #6 of 29 (permalink) Old 10-29-2016, 02:25 AM
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Right, I've had a bit of a google around and it is not as uncommon as you might think.
DID and RK chains are mentioned.
It seems t be described as "normal" once all other issues have been checked and found to be correct.

Hope that helps.
Lastly, if you don't get help from a forum good samaritan can I suggest sending a PM to Ed Eskew and ask for his advice.

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post #7 of 29 (permalink) Old 10-29-2016, 02:38 AM
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Simon, check if you have any visible wear on the inside or outside of the rear sprocket, which could indicate alignment issue's.
Did you carefully compare the "new" front sprocket with the old on to see if there's no offset missing or added ?

Dave, that 6mm you mention is very much model specific even on the old F4's if I remember correctly, later models had it as 8mm etc.

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post #8 of 29 (permalink) Old 10-29-2016, 03:14 AM
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Cheers Donsy.

It ain't what you ride, it's the way you ride it.
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post #9 of 29 (permalink) Old 10-29-2016, 03:56 AM
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Hate to say it, but take the sprocket cover off and check the sprockets for signs of alignment issues. Looks like your rear stand has a bearing, so carefully rotate the wheel and check for tight spots on the chain tension.

I suspect the issue might be with the front sprocket.
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post #10 of 29 (permalink) Old 10-29-2016, 02:26 PM Thread Starter
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Thanks guys. Will check today and let you know the results.


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