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loonyberg July 28th, 2007 08:53 AM

Nothing in my exhaust silencer
I took the end cap off my exhaust to replace the rivets. I looked in the silencer and all there is in there is a mesh which is bolted to each side of the silencer about half way down. The end cap has a pipe flange pointing in to the silencer. Should there be a perforated pipe connected to the end cap flange which has silencer material around it?

I think across the pond a silencer is a muffler.

LeFrog July 28th, 2007 01:29 PM

RE: Nothing in my exhaust silencer
There should definitely be something in there, yes. If you are not the first owner, obviously the packing material and the tube inside were removed for performance. I don't know about British laws but I would be surprised if this bike passed inspection for street.

loonyberg July 28th, 2007 02:13 PM

RE: Nothing in my exhaust silencer
Well it passed the MOT (road worthy test) no problem a couple of months ago whilst I owned it. I'm the third owner. It's not that loud in fact I've heard some road bikes that are much noisier. Just wondered if anything should be in there. I tried DCR in the UK but they hadn't got the exploded view of the parts on their system so couldn't tell me what should be in there.

LeFrog July 28th, 2007 07:29 PM

RE: Nothing in my exhaust silencer
Check the parts manual in the download section (here or at and check the fiche for the exhaust pipe.

In 02 the exhaust was redesigned and indeed the tip looked different. I know because I installed a 2002 end tip on my 2001 exhaust and it is less corked (Sandskipper parted this one out).

So I was wrong about that but there should be some stuffing material against the walls of the silencer, behind some mesh, as well as a piece of stuffing around the tube inside the end tip.

Check the parts manual 2001-2002, page 25.

kelsow July 29th, 2007 04:00 AM

RE: Nothing in my exhaust silencer
When I repacked mine, I had to drill out the rivets at the back end of the pipe.
That is where the packing went for mine. There was nothing in the end cap section.

awilksch July 29th, 2007 04:26 AM

1 Attachment(s)
Hi Looneyberg,

My FE 550 '05 model was set up from the shop with the tea strainer (spark arresor mesh) removed, this normally sits right in the end of the eahauste end cap, and is removed by grinding away a few welds, also my bike came with the 'S' bend pipe removed, the s bend pipe is a short curved tube from the end cap end, that does not sleeve into the perforated exhaust core, it sits within the chamber that you mention, usually its bolted, but may be riveted a little over half way to the end of the silencer.

The s bend tube within that end chamber forms an area that the exhaust must bounce from the end of the can back to the middle to then funnel out the end cap, in Australia, it seems that many of the dealers will remove them ror predominantly off road use, I'd suggest litle change it noise level, but must breathe easier.

I have ( I think ) attached the schematil from the current design silencer, you can see the bent section of pipe attached to the end cap, this is what I suspect has been removed.

Hope it helps, there are some pics of an aftermarket exhaust cap in my gallery awilksch you may be able to draw some conclusions from that as well.


loonyberg August 12th, 2007 09:06 AM

I seem to have a small length of pipe about 2 to 3 inches long which is welded to the end cap and is also fixed with a welded bit of metal acting as a support.. This seems to mean that a large amount of exhaust pressure is against the actual end cap and the rivets holding it on. The pressure wave would then have to bounce back and enter the pipe as you describe. I suppose a previous owner has removed the other pipe which connects to this one. Noise is not too bad. It just seemed a bad design. I was thinking of removing the pipe in the end cap so there is less pressure on it.

cypher August 12th, 2007 05:45 PM

the idea is partly to reduce noise by having the staggered exit to the pipe the sound waves aren't exiting straight out.
seen this on several bikes i've had, 2 & 4 st.

unless your bikes highly tuned i doubt it would make much difference. it's worked fine the way it is for the last 6 years so the exhaust pressure probably isn't doing anthing adverse to the exhaust.

repacking mine soon. only thing i might do is look at getting some nuts brazed nto the inside of the exhaust so i can replace the rivets with bolts.

something i used to do on 2st's that made repacking much easier.

ned37 August 13th, 2007 09:26 AM


I suppose a previous owner has removed the other pipe which connects to this one.
that's normal. thats the way they come stock. the tailpiece doesn't connect to the baffle.

loonyberg August 17th, 2007 10:57 AM

Thanks for that. It makes me feel better as I thought something else should be in there. I won't bother about it anymore...means one less job!

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