999 Exhaust Gaskets

Discussion in '749 / 999' started by TheJackal, Nov 1, 2022.

  1. Wondering if there are different sizes (part numbers) for 999 exhaust gaskets that are used for connecting the pipes between each other and to the silencer.

    I’m pretty sure I’m missing a few!
     
  2. Hi,

    yes I just had mine apart, 2 different sizes.
     
  3. Front/rear cylinders have different diameter pipes to provide equal mass back pressure, so yes they are different sizes.
     
  4. Thanks!

    Curiously I'm getting blowback from the exhaust manifold pipe to mid pipe connection where spring #3 goes:

    upload_2022-11-2_10-18-58.png


    I was under the impression there might be an exhaust gasket missing there but, apparently not.

    image.png

    image.png
     
  5. Get yourself a small pot of exhaust sealant, the type that stays flexible. You only need a smear of the stuff. Andy
     
  6. Any recommendation?

    There are so many different types so I don't want to get the wrong stuff...
     
  7. Loctite 5990 is as good as any, just don’t use a ‘permanent’ sealant like Firegum. Andy
     
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