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    #1

    Pilot screw dilema

    Working on my 1980 GS 750E project. Ok so I pulled the plugs on two carbs and can't get the pilot screws to come out. Did the PB blaster several times, heated up with torch. No luck. Now I am screwed. The one I heated up, the oring probably melted. Not sure where to go with this now.
    Tags: None
    #2
    Left handed drill bit, or cut a slot down the hole with disc on a Dremel to create a new channel in the screw for a flat head.

    Below is my saga on the pilot screw. DON'T use a screw extractor, bad idea!

    Fuel mixture screw stuck - The GSResources Forums
    https://www.thegsresources.com/_forum/forum/technical-forums/carb-fuel-exhaust/1747809-fuel-mixture-screw-stuck
    I am working on my carburetors for a 1980 GS850GL and two of my fuel mixture screws will not come out. This is the first time they have been out as far as I can tell, the plugs were still in place. One of them is almost out and I think I can get the rest with a screw extractor on that one. The bigger issue is the number 1 carb
    - David
    80 GS850GL
    Arlington, TX
    https://visitedstatesmap.com/image/ARMNMTNDSDTXsm.jpg
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      #3
      oring isnt an issue. in fact if they melt that will usually release the mixture screws. Id heat it up again and let the PB soak in for a few days. Add a drop now and then. gonna take TIME for it to soak through..its not instantaniuos!!!. I can rebuild them if you wish. Private Message me for my info and we can talk on the phone about the situation.
      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

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        #4
        Thanks all. Think I will try to find that Kriol penetrating oil, let set for a days use heat again. etc. Last resort cut off when to make slot deeper. I used to have a 81 1100 so I have rebuilt these mikuni carbs several times.

        Comment

          #5
          Cutting a slot works, but my preference is to drill a hole in the screw, and pound in a torx bit that's slightly larger than the hole. That typically provides enough grip to work the screw loose.
          Ed

          To measure is to know.

          Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

          Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

          Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

          KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

          Comment

            #6
            Originally posted by dgates1 View Post
            Left handed drill bit, or cut a slot down the hole with disc on a Dremel to create a new channel in the screw for a flat head.

            Below is my saga on the pilot screw. DON'T use a screw extractor, bad idea!

            https://www.thegsresources.com/_foru...re-screw-stuck
            I learned a lesson with those brittle screw extractors. Never again.

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