Drilling out pilot ciruit screw

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  • maro
    • Feb 2026

    #1

    Drilling out pilot ciruit screw

    Drilling out Pilot Circuit screw. Yeah, the notches to be able to turn this sucker out are worn, and now it is stuck in there

    Going to try and screw in a "screw" then unscrew the whole thing. Any other thoughts.

    ALSO,

    Anyone have an extra one they can give or sell in a jiffy?

    thanks ya'll
  • salty_monk
    Forum LongTimer
    GSResource Superstar
    Past Site Supporter
    Super Site Supporter
    • Oct 2006
    • 14001
    • London, UK to Redondo Beach, California

    #2
    Good luck... Hopefully they are the brass ones & you can get something in there.

    If you drill the centre of it you can then knock a straight screwdriver into the walls that are left & get some purchase on it that way, heat might help too.

    www.z1enterprises.com do the replacements as do bikebandit etc.

    Dan
    1980 GS1000G - Sold
    1978 GS1000E - Finished!
    1980 GS550E - Fixed & given to a friend
    1983 GS750ES Special - Sold
    2009 KLR 650 - Sold - gone to TX!
    1982 GS1100G - Rebuilt and finished. - Sold
    2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!

    www.parasiticsanalytics.com

    TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

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    • Guest

      #3
      Cut a notch in it with a Dremel. Sounds barbaric but it works

      Comment

      • maro

        #4
        Originally posted by chef1366
        Cut a notch in it with a Dremel. Sounds barbaric but it works
        hmmm, what dremmel bit would fit in there?

        Comment

        • Guest

          #5
          Use a cutting wheel. Cut the top off the port that leads to the idle mixture screw and put a good size notch in it. Plenty of threads so don't be too worried.

          Comment

          • makenzie71

            #6
            I wish you luck...the one of the previous owners of my bike had two of the damn brass heads worn so much and locked down so hard that an ease-out wouldn't touch them...now one of my throttle bodies is toast.

            Comment

            • Guest

              #7
              This is probably one place that an e-z out would work great.

              Comment

              • Guest

                #8
                Originally posted by renobruce
                This is probably one place that an e-z out would work great.
                I've broke one every time. They start making that creaking sound and you think you're getting close and BAM break out the Dremel.

                Comment

                • Guest

                  #9
                  Originally posted by makenzie71
                  I wish you luck...the one of the previous owners of my bike had two of the damn brass heads worn so much and locked down so hard that an ease-out wouldn't touch them...now one of my throttle bodies is toast.
                  Send it to me and I'll get it out.

                  Comment

                  • maro

                    #10
                    Originally posted by chef1366
                    Use a cutting wheel. Cut the top off the port that leads to the idle mixture screw and put a good size notch in it. Plenty of threads so don't be too worried.
                    I must have you confused. th pilot (low idle) circuit jet is what I need to get out. the jet screws down into a narrow tube. The tube gets closed off at the top by that rubber cap. There is no way to dremel cut the top of that screw as there is no access to it.

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                    • buster

                      #11
                      I paid the money to get a set of reverse drill bits. I let PB Blaster soak on mine overnight and then slowly drilled into the center with the reverse drill bit and it found its way out. Even an easy out would work but I love the drill bits for small stuff (leaves room for error).

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                      • Guest

                        #12
                        Originally posted by chef1366
                        I've broke one every time. They start making that creaking sound and you think you're getting close and BAM break out the Dremel.
                        I wouldn't think you could break an e-z-out bit in a brass screw.

                        The only other thing I can think of is to maybe epoxy a small rod onto the tip of the screw. Let it cure and then try and screw it out.

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                        • maro

                          #13
                          I know this sounds pedestrian, but can someone give me a break down on "EZ-out"

                          thanks

                          Comment

                          • buster

                            #14
                            EZ-Out I believe was or is a name brand for a screw extractor.

                            http://www.sears.com/shc/s/p_10153_1...0P?vName=Tools

                            Here is the sears set with the drill bits, but if your money tight (some of us are) you can do a search on Harbor Freight for screw extractor and come up with something.

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                            • makenzie71

                              #15
                              Originally posted by chef1366
                              Send it to me and I'll get it out.
                              no point...he damaged the recesses for the screws and I just amde things worse trying to pull the one bastard out. Just needs a new throttle body...

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