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Post by Lagger on Jun 24, 2017 11:44:47 GMT -6
I know this question has been done to death but I'm going to risk asking again :-)
I have a completely stock exhaust system complete with goat's bladder. I'd like the bike to be a little louder than factory but not too loud. I believe that one way to do this is to gut the bladder. I believe the way to do this is to split the bladder in half around the welded seam, cut out all the interior and then weld it back together.
My question is has anyone here done this and what was the experience like?
Thanks for any help
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Post by Streak07 on Jun 26, 2017 15:19:18 GMT -6
You can gut the goat belly and/or the the mufflers. The seam works, I've also seen some people cut an access hole on the top and then weld a patch back on. Just don't do a complete delete because it works as a crossover chamber which is why the bike has such good low end torque stock. It's an efficient 2-1-2 system.
As far as sound I haven't done it on this bike myself.
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Post by Lagger on Jun 26, 2017 15:54:15 GMT -6
You can gut the goat belly and/or the the mufflers. The seam works, I've also seen some people cut an access hole on the top and then weld a patch back on. Just don't do a complete delete because it works as a crossover chamber which is why the bike has such good low end torque stock. It's an efficient 2-1-2 system. As far as sound I haven't done it on this bike myself. Thanks buddy, I think I'll just cut around the seam, gut it and then re-weld, I'm not planning to delete it. Cheers
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Post by Lagger on Jul 9, 2017 9:23:46 GMT -6
I did post some pics of the progress with this mod on my "few odd jobs" thread but for the sake of consistency (and just in case someone comes looking for how to do this on a Meanie bladder) here's the pics again. I spent some time looking at the make-up of the bladder - I referred to Gadget's page but the how-to there shows a different bladder with a slightly different lay-out. I looked inside as much as possible using a torch and worked out where the wall holding the honeycomb was fixed - I could also see the weld marks on the exterior. I then marked up where to cut. I used an angle grinder to do the cutting, a dremel cutting wheel lasted about half an inch so although it cut much neater than the angle grinder it wasn't really up to the job. So, first job was to cut around the side of the bladder, this pic shows the cut section and it's useful as a guide to anyone wanting to know where to cut. Cut section removed allows the first sighting of hte honeycomb: I didn't want to remove the whole of the "wall" holding the honeycomb as it will still create a little bit of back pressure and I figured I didn't want to have too little back pressure. This might not actually make much difference but hey ho, I only removed the honeycomb. To start removing it I bashed a hole through it with an old screwdriver, it's thicker than I expected at around 1.5" I kept chipping away at it, pulling out bits with a pair of long nosed pliers, twisting around rather like opening a tin of sardines. It took a fair while to do it this way. I changed tactics and used my screwdriver to force between the honeycomb and the circular hole it sits in. After getting about half way around I was able to twist the hole thing out of the hole and ended up with this: which left me with this in the bladder: I cleaned up all the edges and it's now ready to be re-welded together. Job done, time for a cup of tea :-)
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Post by Texas on Jul 9, 2017 13:46:14 GMT -6
That was interesting, thanks for the pictures! The honeycomb was not as thick as I was expecting. The use of perforated metal screen over both the inlets and outlets reminded me of the exhaust baffles made by Khrome Werks. and some of the big city thunder baffles...
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Post by lee on Jul 14, 2017 19:33:20 GMT -6
Very cool, and great large pics. I've drafted it for Gadget's page here, let me know if that's ok or if you want to add anything.
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Post by Lagger on Jul 15, 2017 0:17:29 GMT -6
Very cool, and great large pics. I've drafted it for Gadget's page here, let me know if that's ok or if you want to add anything. Perfect Lee, your draft is good to go, very happy for you to use the pics. Cheers
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