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I know my Jardine Spaghetti mufflers have fiberglass baffles as there's a rivet you can remove and the inner section comes out. I did this and repacked both mufflers and they really sound great. The XJ11 mufflers seem to be welded and you can't get inside to replace anything. I would like to replace the Jardines with the XJ11 stock exhaust to try and get the bike as much as I can back to stock carburetion/exhaust if that's possible.
I was finally able to find pieces of exhaust for it, enough to make a complete working set but one muffler has a dent on the top. I was also able to find a 2nd set of XJ11 mufflers which some idiot cut off the crossover pipes right at the muffler to I guess, remove them from the bike? This 2nd set are otherwise pretty much dent/scratch free. They had been stored in a barn and a chipmunk or mouse used them for food storage & maybe a nest as well. When you shake the muffler though, half shells of sunflower keep coming out.
My plan is to make a flat wooden jig out of plywood & angle iron, bolt the complete working mufflers to it and then once it's firmly bolted in as it would rest when bolted to the XJ11, remove the dented muffler & bolt on in its place, the pristine muffler with the crossover cut off. Then have a welder remove the crossover from the dented one, align the cutoff with the muffler and weld it on the good one while it's in the jig so the tube can be attached in the correct position. This will give me a complete & undented original exhaust & I'll have that powder coated.
Thing is, back to the baffle & those shells...
I don't know what's inside the Yamaha muffler, if there's baffling inside I won't be able to do what I'd planned which is to immerse the muffler in an cellulase enzyme bath to dissolve cellulose (which is what likely all that the critter would have put in there is made of cellulose). My concern is whatever the sound quieting/baffling is made of, the liquid might affect it. Since I can't see inside the muffler I don't know if there's a massive nest in there to block exhaust or if it's just pieces of shell which will eventually char & blow out. Perhaps there's no baffling & it's all metal construction in which case I have no problem doing what I planned.
It would be best to simply find a good muffler but they're too expensive or someone has bought the affordable ones before I found out about them so I have to go about this the long way if I want to do it right. Any idea what's inside the XJ11 mufflers?
I was finally able to find pieces of exhaust for it, enough to make a complete working set but one muffler has a dent on the top. I was also able to find a 2nd set of XJ11 mufflers which some idiot cut off the crossover pipes right at the muffler to I guess, remove them from the bike? This 2nd set are otherwise pretty much dent/scratch free. They had been stored in a barn and a chipmunk or mouse used them for food storage & maybe a nest as well. When you shake the muffler though, half shells of sunflower keep coming out.
My plan is to make a flat wooden jig out of plywood & angle iron, bolt the complete working mufflers to it and then once it's firmly bolted in as it would rest when bolted to the XJ11, remove the dented muffler & bolt on in its place, the pristine muffler with the crossover cut off. Then have a welder remove the crossover from the dented one, align the cutoff with the muffler and weld it on the good one while it's in the jig so the tube can be attached in the correct position. This will give me a complete & undented original exhaust & I'll have that powder coated.
Thing is, back to the baffle & those shells...
I don't know what's inside the Yamaha muffler, if there's baffling inside I won't be able to do what I'd planned which is to immerse the muffler in an cellulase enzyme bath to dissolve cellulose (which is what likely all that the critter would have put in there is made of cellulose). My concern is whatever the sound quieting/baffling is made of, the liquid might affect it. Since I can't see inside the muffler I don't know if there's a massive nest in there to block exhaust or if it's just pieces of shell which will eventually char & blow out. Perhaps there's no baffling & it's all metal construction in which case I have no problem doing what I planned.
It would be best to simply find a good muffler but they're too expensive or someone has bought the affordable ones before I found out about them so I have to go about this the long way if I want to do it right. Any idea what's inside the XJ11 mufflers?
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