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Marbles sounding on deceleration: any idea what it can be?

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Hi All,

I just bought a 2009 DRZ400.  When I test drove it I didn't hear the sound, but when I got home I did.   Here is what happens; only on deceleration I hear what sounds like marbles coming from the left side of the engine.  This is the first DRZ I owned, so I'm not familiar with it as I am with my other bike.  Anyone have an idea what this could be, or is this normal for this kind of bike?  Thank you for your help!    

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Is the noise coming from the right side of the engine?

 

On the right side of the engine, by the exhaust pipe there is a metal piece that stick out (Cam chain tensoner) Does it look something like this?

 

https://www.thumpertalk.com/shop/ThumperTalk-Manual-Cam-Chain-Tensioner-ENG-TT-MCCT1-p2006766344.html Does it have two 17mm nuts on it?

 

if so, the cam chain probably stretched alittle bit, you can tighten it up if so.

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Only on the left side, and only on deceleration.  Also, on deceleration, when I pull in the clutch the sound goes away-when reengaging the clutch it starts again. 

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Only on the left side, and only on deceleration.  Also, on deceleration, when I pull in the clutch the sound goes away-when reengaging the clutch it starts again. 

could be the chain slapping on the upper chain guide or swing arm.

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I'll try that.  Start with the most simple solution.  Thank you for your input!  I'll let you know if it works.

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Most likely the chain, mine did the same thing. Then I checked chain tension and cleaned/lubed it and the noise went away.

Thank you for the post; it worked!  

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