1. 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.

ez-just mixture screw will not screw all the way in

Discussion in 'EZ-Just Idle Mixture Screw' started by thedeuce, Sep 2, 2013.

  1. thedeuce

    thedeuce Member

    Joined:
    Sep 2, 2013
    Messages:
    1
    Likes Received:
    0
    i took out the old mixture screw(which will go all the way up and protrude out of the hole) and installed the new ez-just and it will only go up half way. i really have to torque on it with a screw driver and i still can't get it all the way through. it seems to me that the screw is too big. help please
  2. kenfuzed

    kenfuzed Administrator Staff Member

    Joined:
    Jan 1, 2005
    Messages:
    10,498
    Likes Received:
    139
    Location:
    Las Vegas NV
    Unfortunately the factory (Keihin) has a very poor/broad tolerance on the threads tapped in these carburetors. Some may even have warped threads and since the EZ-Just is longer it may tighten across the length of the threads. Also common in these carbs is a carbon build up in the lower inside threads. The thread pitch on the EZ-Just is designed to fit in the majority of carburetors despite all the thread variations on the Keihin, but on rare occasions they may feel overly tight. I recommend cleaning the tapped threads with some carburetor cleaner first. Be sure to remove the packing (o-ring, washer, spring) before cleaning. Now with some light machine oil (3-in-1, Liquid Wrench) apply some to the EZ-Just and work it back and forth in the threaded hole. Clean and reapply a few times and you will probably remove quite a bit of carbon. It may take a few rounds of working the screw back and forth but it beats trying to find a metric tap to clean the threads out.
  3. hotroadking

    hotroadking Super Moderator Staff Member

    Joined:
    Jun 16, 2004
    Messages:
    13,636
    Likes Received:
    558
    Location:
    Mouseville USA
    don't force it and don't over tighten...

Share This Page