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  1. #1
    CB750 New Member Leonanamilena's Avatar
    Join Date
    Jul 2013
    Location
    Elizabeth, nj
    Posts
    1

    4 into 2 Mac exhaust

    Hi guys I'm new here, I have a 1972 cb750k and I wanna replace the original exhaust with Mac 4 into 2 , do I need to change the carb jets? I have the stock air box

  2. #2
    Moderator dirtdigger's Avatar
    Join Date
    Feb 2012
    Location
    Black Hawk SD
    Posts
    2,730
    More than likely yes but you wont know until you ride it and see how it runs and how the plugs look.

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