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Author Topic: Deceleration Rattle Classic 350  (Read 196 times)

topdog29

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Deceleration Rattle Classic 350
« on: December 20, 2014, 10:01:57 AM »
Hello folks, my first post here. Tried getting information from my mech as well as other riders and forums and it has been hopeless since.
The bike has deceleration rattle in the range of 50 to 30 kmph. Chain is lubed well. No other problems.
Is it normal or is it harmful? I have no idea why this sound is coming. Appreciate any advice from you wonderful guys. Thanks! Here is a video of the noise.

https://www.youtube.com/watch?v=FqkecJ0qLq0

Thanks! Safe Riding!
I'm on of those, who wake up at 4 am to have a look at their motorcycle.

Arizoni

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Re: Deceleration Rattle Classic 350
« Reply #1 on: December 21, 2014, 04:47:33 AM »
I didn't hear anything unusual but I don't know exactly what sound to be listening for. :(

Rattles usually come from something loose so use a wrench to check the tightness of the bolts that hold the fenders , the fuel tank, the engine mounts, the headlight rim, the chain guard the "head steady" (brace connecting the cylinder head to the rear fuel tank bolt) or any other thing that is metallic.

Loose tools in the side box(es) also can create a clatter.
Jim
2011 G5 Deluxe
1999 Miata 10th Anniversary

Mr.Mazza

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Re: Deceleration Rattle Classic 350
« Reply #2 on: December 21, 2014, 06:51:25 AM »
My keys rattled a lot, might be that.
Lizzy - 07 500 Deluxe ES - Red and chrome

topdog29

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Re: Deceleration Rattle Classic 350
« Reply #3 on: December 21, 2014, 10:31:08 AM »
Sorry for the bad video, but there is a certain rattle starting at 0.05 and ends at 0.09 seconds.

I'll check the bolts today. I just have a doubt, if something is loose, it ought to vibrate in both acceleration and deceleration, right? My rattles are biased towards deceleration. I'll check and come right back.

Thank you for the help! Cheers.
I'm on of those, who wake up at 4 am to have a look at their motorcycle.

SteveThackery

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Re: Deceleration Rattle Classic 350
« Reply #4 on: December 21, 2014, 02:04:08 PM »
Ah, that's interesting.  It isn't what I would call a rattle - more of a kind of metallic buzzing noise.  Maybe like a bicycle freewheel (but much faster).

Could it be from one of the brakes?  If I listen carefully the buzz seems to be modulated at a low frequency - something like wheel-speed.  Or maybe chain noise from the back sprocket?  Is the chain dry and knackered, and climbing up the sprocket teeth?  The sprocket, or course, also goes at wheel speed.
2014 B5, stock apart from disabled auto-decomp.  Also ride a Kawasaki Versys 650 for everyday use.

Previous:
'06 ElectraX (Good bike, had no trouble at all)
'02 500ES (Fully "Hitchcocked" - 535, cams, piston, etc - and still a piece of junk)

pmanaz1973

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Re: Deceleration Rattle Classic 350
« Reply #5 on: December 21, 2014, 05:13:20 PM »

Kind of hard to tell, but sounds like normal front disk brake noise. 

I can occasionally hear that on my bike when lightly breaking with the the front brake only.

Where you braking in that portion of the video?
1991 XR250L (traded for)
1976 Harley XLH 1000 (blew up)
1993 CBR 600 (sold for)
1976 Norton Commando 850 (traded for)
1972 BMW R75/5 (sold)
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topdog29

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Re: Deceleration Rattle Classic 350
« Reply #6 on: December 21, 2014, 06:48:16 PM »
Thanks all for the help. Appreciate it.

I was breaking with only the rear drums. Slowly, without stepping on the paddle.

It indeed sounds like chain noise. Chain is lubed and the slack is okay as per manual. Can it be the bearings or something which is well hidden?

This thing is getting on my nerves like some vague abdominal pain. Can't do anything to relieve it, at least for now. What I fear is damage and unforeseen breakdown. Sigh.
Regards,
I'm on of those, who wake up at 4 am to have a look at their motorcycle.

ace.cafe

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Re: Deceleration Rattle Classic 350
« Reply #7 on: December 21, 2014, 06:53:47 PM »
Sounds like a dry chain to me.

What year is this bike?

topdog29

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Re: Deceleration Rattle Classic 350
« Reply #8 on: December 21, 2014, 07:16:03 PM »
September 2014. 4000 odd km on it. Run in well, no strenuous riding. Chain is not dry as far as I know from the inspection. Should I clean the chain with kerosene/chain cleaner and lube it all over again?
Thanks
I'm on of those, who wake up at 4 am to have a look at their motorcycle.

ace.cafe

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Re: Deceleration Rattle Classic 350
« Reply #9 on: December 21, 2014, 07:36:57 PM »
September 2014. 4000 odd km on it. Run in well, no strenuous riding. Chain is not dry as far as I know from the inspection. Should I clean the chain with kerosene/chain cleaner and lube it all over again?
Thanks
Well, it might not be the problem, but it never hurts to clean and lube the chain anyway. Maybe it might help. Also check the slack/tension of the chain while you are at it, and also the alignment of the chain and rear wheel.

topdog29

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Re: Deceleration Rattle Classic 350
« Reply #10 on: Today at 10:02:48 AM »
I'll do that today, and get back at you folks.
Hope it goes well. See ya,
Cheers!
I'm on of those, who wake up at 4 am to have a look at their motorcycle.

JVS

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Re: Deceleration Rattle Classic 350
« Reply #11 on: Today at 01:14:50 PM »
Try what Arizoni has mentioned along with the chain lubing + adjusting. However, it sounds like the typical keychain rattle but it must be something else, right?  ;) Check the front mudguard mounts/stays for tightness as well. That metallic ringing can also be something like the springs on the centerstand or the ones underneath the seat...But haven't heard this type of 'rattle' before.
Sons continuing wars, our fathers were enemies


pmanaz1973

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Re: Deceleration Rattle Classic 350
« Reply #12 on: Today at 02:02:31 PM »
Is the rear wheel centered/aligned?  Sometime a binding chain can cause some weird noises once it is no longer under load. 
1991 XR250L (traded for)
1976 Harley XLH 1000 (blew up)
1993 CBR 600 (sold for)
1976 Norton Commando 850 (traded for)
1972 BMW R75/5 (sold)
2014 Royal Enfield C5

topdog29

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Re: Deceleration Rattle Classic 350
« Reply #13 on: Today at 03:09:36 PM »
pmnaz1973 thanks man! Just had a moment of realization that it makes noise only when chain is off-load, i.e. while clutching and rear braking simultaneously. So it is the chain. And not loose tools or keys etc. At least it seems like that. Can't wait to get my hands dirty and find out. Finals week makes it difficult.
Thanks all. Safe riding.
I'm on of those, who wake up at 4 am to have a look at their motorcycle.