Don't know if it will help but I use exhaust gaskets from a 1986 K100 BMW .
Why , because I had some laying around . Their a bit larger than the ca95's exhaust port so I used my cutoff wheel and made a 45 degree cut, I think I may have removed 3/16" and pushed them into the exhaust port . These are a soft copper gasket not a composite gasket like Sam was using .
They seal well and unlike the valve packing gaskets they stay in place while fitting the exhaust . I've done this to 2 of my CA95's .
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