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Old 05-08-2010, 9:29 AM   #1
 
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Front sprocket noise normal ?

I had my bike up on the paddock stand turning the back wheel to inspect the tread and as I turn the wheel the front sprocket is making a constant "snick, snick" sound as it rotates.
Chain is correct tension, lubed ok, no kinks or obstructions. Sprockets good, chain good overall.
The clicking noise seems to be coming from the front sprocket hub, which feels to have a tiny bit of horizontal freeplay when I pull on it. Centre nut is on tight. The bike rides fine.
Am I being paranoid, or is it normal to get a bit of mechanical noise from the chain and sprockets ?
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Old 05-08-2010, 9:39 AM   #2
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Re: Front sprocket noise normal ?

Originally Posted by Jacker View Post
I had my bike up on the paddock stand turning the back wheel to inspect the tread and as I turn the wheel the front sprocket is making a constant "snick, snick" sound as it rotates.
Chain is correct tension, lubed ok, no kinks or obstructions. Sprockets good, chain good overall.
The clicking noise seems to be coming from the front sprocket hub, which feels to have a tiny bit of horizontal freeplay when I pull on it. Centre nut is on tight. The bike rides fine.
Am I being paranoid, or is it normal to get a bit of mechanical noise from the chain and sprockets ?

Does the chain have the minimum slack at its tightest point?
It's not unusual for the front sprocket to have some lateral movement.
I definately wouldn't consider spinning the wheel to be quiet. It's normal for it to be quite noisy.
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Old 05-08-2010, 10:19 AM   #3
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Re: Front sprocket noise normal ?

I noticed that a OEM front sprocket has some sort of soft padding on each side of it. Never seen the same feature on sprockets you buy elsewhere. I think I've read about people complaining about noisier front sprocket once they replaced the OEM with a non-OEM. Maybe the padding is there to eliminate the freeplay?
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Old 05-08-2010, 10:21 AM   #4
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Re: Front sprocket noise normal ?

Originally Posted by D.S View Post
I noticed that a OEM front sprocket has some sort of soft padding on each side of it. Never seen the same feature on sprockets you buy elsewhere. I think I've read about people complaining about noisier front sprocket once they replaced the OEM with a non-OEM. Maybe the padding is there to eliminate the freeplay?
My understanding of the rubber buffers is for the side plates to run on to reduce noise. Can't say I've ever seen that officially explained though so it could be way off.
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Old 05-09-2010, 7:39 AM   #5
 
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Re: Front sprocket noise normal ?

Thanks Bladeracer and D.S.
I cleaned up the chain and sprockets today and really lubed everything.
Clicking is gone.
But I noticed the chain does not mate centrally on both sprockets and is biased toward centre of bike, if that makes sense.
Just noticed too, newish front sprocket has only 15 teeth, not sure about rear sprocket teeth. So not OEM setup.
Oh, the joys of being the third owner of a Sportsbike, I have SFA idea of the bikes full history.
Thanks for your help, much appreciated !
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Old 05-09-2010, 10:08 AM   #6
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Re: Front sprocket noise normal ?

Originally Posted by Jacker View Post
Thanks Bladeracer and D.S.
I cleaned up the chain and sprockets today and really lubed everything.
Clicking is gone.
But I noticed the chain does not mate centrally on both sprockets and is biased toward centre of bike, if that makes sense.
Just noticed too, newish front sprocket has only 15 teeth, not sure about rear sprocket teeth. So not OEM setup.
Oh, the joys of being the third owner of a Sportsbike, I have SFA idea of the bikes full history.
Thanks for your help, much appreciated !
Maybe you have a 520 sprocket and 530 chain?
That would allow some lateral float.
520 is 6.35mm and 530 is 8.525mm wide but it should be stamped on the sprockets and the chain side plates.
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Old 05-09-2010, 11:53 PM   #7
 
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Re: Front sprocket noise normal ?

Checked the chain : it is a DID chain. Marked 50VM on links.
The back sprocket is only stamped "40" so guess that is number of teeth.
Q : If stock OEM sprockets for the 929 are 16 front and 43 rear, mine are 15 front and 40 rear.
So what has that done for the gearing, 15/40, I have no idea.
Better performance ?
Does this affect my speedo readings as well, I guess it must.
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Old 05-09-2010, 11:58 PM   #8
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Re: Front sprocket noise normal ?

Originally Posted by Jacker View Post
Checked the chain : it is a DID chain. Marked 50VM on links.
The back sprocket is only stamped "40" so guess that is number of teeth.
Q : If stock OEM sprockets for the 929 are 16 front and 43 rear, mine are 15 front and 40 rear.
So what has that done for the gearing, 15/40, I have no idea.
Better performance ?
Does this affect my speedo readings as well, I guess it must.

Your gearing is almost identical to stock so there won't be any measurable difference in performance.
The sprockets and chain are marginally lighter though.
The 50VM is 530 so check that the sprockets are 530 as well.
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Old 05-10-2010, 12:03 AM   #9
 
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Re: Front sprocket noise normal ?

bladeracer, you are awesome with your knowledge ! thanks again !
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