I cleaned the silencer on my 2010 bike silencer last year. I don't think it had been done by the previous owners and was incredibly coked up to the point that the baffle was almost completely blocked.
After I drilled out the rivets to remove the baffle I used an electric hot air paint stripper on the baffle. Once it got hot the layers of carbon and spooge just burnt away leaving the baffle clean and clog free. A gas torch would probably have been slightly quicker but the end result was the same.
Rather than buy new packing I just used some loose fill packing I had left over from a 4 stroke exhaust.
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