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Emulsion tube question.

Discussion in 'Motorcycle Tech Talk' started by xcaret, Apr 23, 2021.

  1. xcaret

    xcaret New Member

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    On this site where they advertise a perfiomance kit for the Keihn CV carb, they point to the emulsion tube and say for mid range. I am swapping partsaround from 2 carbs ,and have 3 emulsion tubes , wich areall different . That's beside the pouint, I realy am asking if the needle in combination with the emulsion tube is for mid range ,where does top rpm range get it's fuel from.. ?
    xcaret, Apr 23, 2021
    #1
  3. hotroadking

    hotroadking Super Moderator Staff Member

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    Look at the needle, it's tapered, so the farther open the throttle the farther up the needle goes. Since it tapers it allows more fuel to come out of the tube the further it rises.

    The main jet is at the bottom of the emulsion tube when the throttle is wide open the needle is fully out and the main jet supplies the extra fuel you need at WOT.
    hotroadking, Apr 27, 2021
    #2

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