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Latest post Fri, Jul 6 2018 5:44 AM by FX. 2 replies.
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  • Thu, Jul 5 2018 1:39 PM

    Carb Rejet.

     I have an 86 FXSTC with an 80 in. evo. How do I know what jet size to go up to when I'm installing drag pipes?

  • Fri, Jul 6 2018 4:40 AM In reply to

    • Ironhead
    • Top 10 Contributor
    • Joined on Tue, Mar 21 2006
    • Near Sunset at Sunset Beach, O'ahu, HI Oct 23, 15
    • Posts 2,669
    • Moderator

    Re: Carb Rejet.

    sndyrige - first, welcome to the forums and whatpart of the country are you from?

    As you have guessed, you will normally have to go to a richer jet - the article below should be a bit of help (although for a more-current carb than on your '86).  your shop manual should also have a section on replacing jets and, more importantly, on how to read your plugs to ensure you have the proper jets.



    Hope this helps

    The first tool out of the box should be the "book"  Geeked

  • Fri, Jul 6 2018 5:44 AM In reply to

    • FX
    • Top 10 Contributor
    • Joined on Sun, Mar 12 2006
    • Tonawanda NY
    • Posts 5,210
    • Moderator

    Re: Carb Rejet.

    There is no set rule sndyrige, all applications are different, you have to 'read the plugs'...


    Don't force it, get a bigger hammer.

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