Exhaust (muffler) Degradation '012 Bonneville

Discussion in 'Technical Help' started by otari_99, Dec 19, 2024 at 2:37 PM.

  1. otari_99

    otari_99 New Member

    Dec 12, 2024
    6
    3
    CA-SF Bay Area
    #1 otari_99, Dec 19, 2024 at 2:37 PM
    Last edited: Dec 19, 2024 at 5:56 PM
    Greetings!

    There are small rust spots and bulges occurring on my right-side muffler. The left-side muffler appears to be fine. What's even more interesting (or disturbing) is that it's occurring around the circumference.

    The spots are hard to see in the pic, but basically there two areas (identified within the two sets of red markings) where the issue has occurred.

    Anyone out there observed similar degradation?

    Thanks!

    IMG_6842_0.jpg
     
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  2. otari_99

    otari_99 New Member

    Dec 12, 2024
    6
    3
    CA-SF Bay Area
    Okay, so I received a quote for re-chrome plating the muffler...

    ~350 USD. That's better than ~656 USD for a new muffler replacement from Triumph.

    I have another right-side muffler that I acquired off of flee-bay that has some long scratches and scuffs that just won't buff out. I'll likely have this unit re-chromed instead...

    Or maybe I should just accept the imperfections.o_O
     
  3. TRIPLE X

    TRIPLE X Senior Member

    Sep 1, 2021
    357
    113
    Downham Market, Norfolk
    Bulging possibly caused by the internal baffles expanding and contracting when hot. It appears to be rusting from the inside and will only get worse so re-chroming might not be an option if the steel is about to hole?
     
  4. Samsgrandad

    Samsgrandad Senior Member

    Dec 15, 2019
    603
    243
    Somerset
    I agree with Triple X your problem appears to be coming from the inside out probably the baffles rusting. No point in re-chroming that one and your secondhand one may still show the scratches after chroming if they are deep
     
    • Agree Agree x 1
  5. otari_99

    otari_99 New Member

    Dec 12, 2024
    6
    3
    CA-SF Bay Area
    @TRIPLE X and @Samsgrandad

    Thank you for your insight! I'm confident you are correct.

    I don't think the scratches on the 2nd unit are too deep, but I'll see what the plating shop has to say about it.
     
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