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Discussion Starter #1
Hi,

I found a piece of metal deep in my exhaust !
Does anyone know what this is? and where it came from?
it was stuck in there but i managed to get it out.
(it came out of the upper exhaust)

piece of metal exhaust CB1000R.jpg 20201013_172430_screen.jpg



lets hope anyone here know the answer :)


Have a nice day guys !
 

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if it is confirmed a cat material, similar thing might be inside the catalytic convertor "the udder" and cause flow restriction and fail emissions.
bang on the cat and try to listen/feel any rattle!
remove the mufflers and have a look inside.
how many kilometers on the bike?
 

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Discussion Starter #6
if it is confirmed a cat material, similar thing might be inside the catalytic convertor "the udder" and cause flow restriction and fail emissions.
bang on the cat and try to listen/feel any rattle!
remove the mufflers and have a look inside.
how many kilometers on the bike?
i banged the cat yesterday but i could not hear anything so i think its good.
my bike has 7000 km
going to remove the mufflers today
 

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i banged the cat yesterday but i could not hear anything so i think its good.
my bike has 7000 km
going to remove the mufflers today
that's low mileage to cause this type of damage.
i know if the bike is running lean, exhaust temps will be higher than normal but don't know if it would cause that.
is there an aftermarket air filter installed?
take some photos when you remove the mufflers.
 

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Much more likely that came from inside the slip-ons and not from any other part of the exhaust.
 

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Discussion Starter #10
that's low mileage to cause this type of damage.
i know if the bike is running lean, exhaust temps will be higher than normal but don't know if it would cause that.
is there an aftermarket air filter installed?
take some photos when you remove the mufflers.
i removed them and i saw nothing special inside.
 

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That almost certainly sources from the catalytic converter. The 'expensive' catalyzing elements (platinum, etc) are often carried on a honeycomb substructure. As to whether you have a worry on your hands, that depends on the extent to which the catalyzing material is failing. It'd probably be wise to pull the cat off the bike and to see what you can see inside, with a bright light. But, realistically, not much harm can come from this, aside from the annoyance of piece of material 'tinkling' around inside your muffler... and less than perfect emissions reductions.
 

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That almost certainly sources from the catalytic converter.
Looks like that midpipe makes a 180 degree turn. I seriously doubt material from the cat made that turn all the way into the end of the slip-on. I'll bet that's a baffle. Has anyone ever previously posted that material from their cat made its way to the muffler?

I don't recognize that slip-on.
 

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Looks like that midpipe makes a 180 degree turn. I seriously doubt material from the cat made that turn all the way into the end of the slip-on. I'll bet that's a baffle. Has anyone ever previously posted that material from their cat made its way to the muffler?

I don't recognize that slip-on.
it's the honeycomb shape that gave it away.

@Chris 89 how big is that piece you took off?
 
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