1. After 20+ years it's time to pass the torch. If you are interested in acquiring this forum please contact support@cv-performance.com for details. Any spam will be reported and blocked.
  2. Welcome to Bike Talk, a forum for all bikers and motorcycle enthusiasts. If you are new to Bike Talk, be sure to register for free and join the conversation.

    There's always someone around willing to help out with questions or give a friendly wave back. All Harley and metric riders are welcome.

Emulsion tube question.

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

  1. xcaret

    xcaret New Member

    Apr 23, 2021
    Likes Received:
    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.. ?
  2. hotroadking

    hotroadking Super Moderator Staff Member

    Jun 16, 2004
    Likes Received:
    Mouseville USA
    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.

Share This Page