New pipes

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  • hoppy1
    • Mar 2026

    #1

    New pipes

    I just got me a a good used set of OEM pipes for my 850. I have the stock headpipes and 4-2 slip-on MAC mufflers on it now. Do you all think I will need to readjust the mixture screws for the new pipes? Also, I do have new exhaust gaskets coming for them. Thanks, Mark
  • steve murdoch
    Forum Guru
    Past Site Supporter
    • May 2004
    • 8506
    • St. Catharines, On.

    #2
    Your bike probably was not rejetted just for Mac slip-ons.
    Returning to the stock system should be a breeze carb-wise.
    Plenty of threads on prepping exhaust bolts for removal.
    2@ \'78 GS1000

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