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aftermarket pipes and rejet question

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    aftermarket pipes and rejet question

    i want to put a vance and hines 4-1 on my 80 850. the bike is stock. do i HAVE to rejet or can i leave it like it is. if i do have to rejet i assume a dynojet stage 1 and follow the directions and i should be ok. just want to double check before i spend 400 bucks on pipes and a jet kit. thanks guys

    #2
    Hi,

    Vance & Hines Jetting Recommendations (600k PDF)

    A Stage 1 kit would be "plug and play".


    Thank you for your indulgence,

    BassCliff

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      #3
      Originally posted by BassCliff View Post
      I installed a MAC 4-1 exhaust on my 1980 GS550L a couple years ago. I don't ride the bike a whole lot but when I do she is a little hard to start and I know she runs a little lean but nothing too terrible. Should I follow this guide for re-jetting and removing my airbox cover? I also have a K&N filter.

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