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cleaning exhaust pipe

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Mar 25, 2007
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#1
should any maintenance be done to the exhaust pipe? i can only imagine how much carbon and spooge gets hung up in the pipe. you could probably take the pipe off and soak it in solvent and knock most of it loose

what do you do to maintain your pipe?
 
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Mar 25, 2007
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#2
repack your muffler everytime spooge comes out and runs down the bottom it is different on all bikes on my 250 is is every 3 to 4 rides. I am not sure what your supposed to do to the expansion chamber/header though.
 
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#3
i just checked the silencer on my yz125 that i repacked about 7 rides ago. theres just a little spooge at the beginning of the packing.
 
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Oct 19, 2006
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#4
I cut my pipe open to remove some dents the other day. There was a layer of hard carbon inside about 3/16ths of an inch thick. It was too hard to chip or dissolve away, I had to burn it out with a torch.
 
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#6
Just about, I split the fat section along the original welds. The pipe was starting to get crushed flat and the normal torch + compressed air trick wasn't working. I made it round and smooth again with hammers and dollies, then welded it back together.
 
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#7
once i get a PC platinum i'm going to do that just for fun on the stock pipe.
 
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#8
get a old chain and shake it around in the pipe and pour some gas in it or starting fluid in it. that should help
 
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#9
I just have to say: it's a lot of welding to put the pipe back together, more than 2.5 feet of weld bead.
 
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#10
i took the pipe off today. i rinsed it with solvent then put a chain in it and rattled the heck out of it. did that about 10 times until the solvent that came out was clear. i also painted the pipe flat black
 

muddy226

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#11
I had the same crusty deposit problem in the pipe of my RM250, and after trying several methods without success put it in one of those garden incinerator things (like a garbage can with holes) with some wood for fuel and left it there for 10 mins.When I looked again there was a nice flame coming out of the stinger, so I refueled with wood and left it. When it came out it was absolutely clean, wiith just a few powdery deposits which just fell out. A quick respray with exhaust paint and the jobs a good 'un !
 

Jaybird

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#13
Radiator repair shops will boil the pipe out for about $30 or so. (take multiple pipes and cut a deal)
It's the best job you can imagine.

I'm sure the fire can will also clean it out, but not many areas are going to allow burning like this. I'm in the country and it won't fly.

I have also used Easy-Off oven cleaner in the past, however it is a messy venture using a very caustic solution. It will not give you the results of a rad tank boil, but will dislodge the bulk of the crud if you are patient.
 
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Mar 18, 2007
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#15
Just out of curiousity (new to dirt still), what do most people use to repack a silencer (or in my case one of those turbine core 2 spark arrestors?) Nevermind, looks like the search function on this forum is much more useful than on my other frequented forum :cool: