Noise in exhaust - BMW Luxury Touring Community
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post #1 of 13 Old Oct 18th, 2016, 1:57 am Thread Starter
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Noise in exhaust

My friend has also K1200LT (2009, 50.000km). He has a problem with noise in exhaust. We think something is broken inside exhaust. When he gives more throttle, noise is more loudy. Some say that this is typically for K1200 LT.

Does anybody know what is wrong?

Thank you very much!
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post #2 of 13 Old Oct 18th, 2016, 2:44 am
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Re: Noise in exhaust

based on your excellent description of the fault, the engine is running that will make a noise. ok that was a joke

it could be cracked engine pipes where they go into the head, it could be a broken muffler support bracket under the gear box, it could be normal, mine growls a bit if you rev it up and has done it since new, not a problem when cruising.

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post #3 of 13 Old Oct 18th, 2016, 3:10 am Thread Starter
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Re: Noise in exhaust

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Originally Posted by Axle View Post
based on your excellent description of the fault, the engine is running that will make a noise.
It is not engine fault, something is wrong/broken inside exhaust and it's a very annoying sound.
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post #4 of 13 Old Oct 18th, 2016, 3:29 am
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Re: Noise in exhaust

the exhaust is not a serviceable component, so I guess your friend is up for a new exhaust, a leaking header pipe at the flange will create noise he needs to check them thoroughly for cracks

Regards Linton
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and no koalas are not Bears



2002 K1200LT
2010 Suzuki GSX 1250FA (the Wifes)
2004 Cub Kamparoo Sprint
My Toys
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post #5 of 13 Old Oct 18th, 2016, 8:08 am
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Re: Noise in exhaust

Without actually hearing your noise, I am going to say I have the same issue. Under certain RPM during acceleration, I get a rattle that I can't get rid of. Every nut and bolt is tight and the exhaust has no broken welds on the outside. The only thing I can think is something inside has broken lose and is rattling. At some point, I will find an exhaust from someone parting out a bike and change it if the price is good enough but it causes no issues with my engine running properly so for now, I just live with it and ride.

Gordon
Sugar Hill, GA
2001 K1200LTI Champagne (current ride) Lazy Susan
1998 R1100RT Never should have sold it
1974 Yamaha TX 750 Twin. Omni Phase Balanced


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post #6 of 13 Old Oct 18th, 2016, 3:56 pm
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Re: Noise in exhaust

Check the tightness of the header connections to the engine block under the bike. They can come loose. The correct torque is 22Nm. There may be a crack in the area where the 4 header pipes connect to the main exhaust body.

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post #7 of 13 Old Oct 19th, 2016, 10:06 am
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Re: Noise in exhaust

When I had my exhaust cracks welded, we found something was rattling around inside the catalytic coverter.

Doug B.
2000 LT purchased July 2013
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post #8 of 13 Old Oct 19th, 2016, 10:15 am
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Re: Noise in exhaust

The "honeycomb" catalytic converter insides, is probably cracked. I have an exhaust if you need one. I'll take $75 plus shipping, if you want it. Or local pick up if you're near kc. PM me if you're interested.
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post #9 of 13 Old Oct 19th, 2016, 12:43 pm
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Re: Noise in exhaust

If you know a welder, cut the silencer open where it does not show and remove the ceramic catalyst section and anything that is lose. Seal it back up. Stainless TIG welding.

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post #10 of 13 Old Oct 19th, 2016, 4:01 pm
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Re: Noise in exhaust

might be a converter coming apart internally if it rattles
happens on 4 wheel stuff all the time
take a look underneath and see if the cat's been banged from bottoming out or high centered

Last edited by Tricky_dickey; Oct 19th, 2016 at 8:59 pm.
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post #11 of 13 Old Oct 27th, 2016, 3:32 am Thread Starter
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Re: Noise in exhaust

Maybe this will help to someone...

Two screws were broken at the start of exhaust from cylinder. That is reason of noise!
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post #12 of 13 Old Oct 27th, 2016, 8:27 am
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Re: Noise in exhaust

Quote:
Originally Posted by Dominik View Post
Maybe this will help to someone...

Two screws were broken at the start of exhaust from cylinder. That is reason of noise!
Well, that would do it. Hope you can replace them.

Gordon
Sugar Hill, GA
2001 K1200LTI Champagne (current ride) Lazy Susan
1998 R1100RT Never should have sold it
1974 Yamaha TX 750 Twin. Omni Phase Balanced


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post #13 of 13 Old Oct 27th, 2016, 5:35 pm
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Re: Noise in exhaust

I used the flange holes as a guide when I drill for an ez-out.
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