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Old 17-01-18, 09:09 AM   #1
zombie
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Question Exhaust Rattle - how to stop?

Hi


I have a Fuel exhaust on a K5 (it was on when I bought).


One of the clamps broke (it was old and rusty). The clamp was over one piece of the pipe, and under another. So I guess one part of the pipe "slips over" the other.


Since then there has been an annoying low speed rattle, presumably as the inner and outer pipe knock against each other.


I got a new clamp but have put it over the outer pipe, and this hasn't helped.


The broken part of the old clamp is still in place - difficult to get out because underneath and rusted. Ideally, I need to get that out and a replacement clamp in there, but I don't think it is possible with the thing on the bike, and I also don't have anything to lift the bike up with.


Just wondering for any tips on either (a) sorting the clamp out or (b) stopping the rattle another way. Please and thank you.

I have pictures to assist, but it keeps saying "This is not a valid image file" so can't upload.
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Old 17-01-18, 04:17 PM   #2
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Default Re: Exhaust Rattle - how to stop?

Could poke and prod at it and still have a rattle. Clean it, get it off as far as you can, clean and reassemble.

There's no shortcut here IMO, couple of bolts (inc the pillion peg end) and it should be easy enough
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Old 17-01-18, 11:24 PM   #3
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Default Re: Exhaust Rattle - how to stop?

Can you take and post a picture of the area?
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Old 18-01-18, 08:17 AM   #4
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Default Re: Exhaust Rattle - how to stop?

As a stop gap bodge you could squirt some high temp silicon sealant at the rattle. Once cured it may stop the noise.
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Old 18-01-18, 08:47 AM   #5
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Default Re: Exhaust Rattle - how to stop?

Thanks for the replies. Links to pics below.

Last edited by zombie; 18-01-18 at 08:52 AM. Reason: links added
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Old 18-01-18, 08:51 AM   #6
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Default Re: Exhaust Rattle - how to stop?

https://ibb.co/k0eeZ6


https://ibb.co/fc7oSR


https://ibb.co/dbyHMm


https://ibb.co/mVvKZ6


Hope this works
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Old 18-01-18, 09:52 AM   #7
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Default Re: Exhaust Rattle - how to stop?

Good call on the Gas sealant.I used this on mine,

https://www.ebay.co.uk/itm/GRANVILLE...YAAMXQTQpR7xf0

Best I've ever used.Not silicone based though.





I had to chop some metal off the 30 Deg link pipe I had to use and from at end of my slip-on and make my own tightening slits with a hacksaw just enough so that when the clamps tighten they squeeze tight properly and then applied the seal to all the joints before clamping tight.


Also in the picture below you can see two metal bands front and rear on the Actual Slip-on(The ones with the Big Rivets).These flapped a little at certain revs as it's a cheap Chinese slip-on.I squeezed sealant under them spreading it in and under with my finger so when it set they couldn't move against the body of the Can.

As this sealant is water based it was easy to wipe off to make neat and clean with a wet microfiber cloth.




The car exhaust clamp was changed for a better proper smoother looking clamp like the ones on the short link pipe.
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Last edited by R1ffR4ff; 18-01-18 at 10:14 AM.
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Old 18-01-18, 11:29 AM   #8
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Default Re: Exhaust Rattle - how to stop?

Thanks for the detail. I've ordered one of those sealents and will give it a go.
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Old 18-01-18, 11:33 AM   #9
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Default Re: Exhaust Rattle - how to stop?

Quote:
Originally Posted by zombie View Post
Thanks for the detail. I've ordered one of those sealents and will give it a go.

Tip:
Once you are happy with the sealing start the engine but don't rev it high.Just let it idle so the exhaust gets hot naturally without putting any big pressure through the system.The seal will set pretty quick.

I've used a lot of sealers in my life as it's sometimes part of my job on Aircraft.This Granville stuff is one of the best I've used and for the price I don't think can be beaten
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Old 20-01-18, 01:27 AM   #10
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Default Re: Exhaust Rattle - how to stop?

looking at the pics from above...

1. your clamping the heat shield not the pipework. you must clamp the pipework.
2. the heat shield rattles when the welds rot and the only fix is to remove the heat shield. it causes no harm and mine got thrown years ago.
3. chances are that if the clamps behind the heat shield are rotten then you will need a new connection sleeve/gasket. these are tubes made of heat proof material that the fore and aft pipework slide into. no amount of 'assembly paste' will seal it you need to buy a new one if its leaking.
4. never over tighten clamps, you will just strip the threads on the bolts. buy 'full' SS clamps as they include an SS bolt and nut as well. once clamped up treat the bolt/threads/nut to some coper grease. dont use copper grease before you clamp it up or you will strip the threads.
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