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Anyone use screw extractor to remove stripped pilot screws?

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    #16
    The threads are .5mm pitch and attempts to "collapse the shell" only damage them. I'm convinced that the proper fix at this point is to run a tap down the hole.

    I agree that a quality tap is not cheap, but I'll be damned if I will spend what McMaster Carr wants for one. $10 is my ceiling for one small tap like that.
    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

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      #17
      What year/model and position is the carb from? Going to check my inventory just in case you need a replacement body.
      http://img633.imageshack.us/img633/811/douMvs.jpg
      1980 GS1000GT (Daily rider with a 1983 1100G engine)
      1998 Honda ST1100 (Daily long distance rider)
      1982 GS850GLZ (Daily rider when the weather is crap)

      Darn, with so many daily riders it's hard to decide which one to jump on next.;)

      JTGS850GL aka Julius

      GS Resource Greetings

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        #18
        Originally posted by JTGS850GL View Post
        What year/model and position is the carb from? Going to check my inventory just in case you need a replacement body.
        Thanks for the offer but please sit tight. These carbs are from a CA model 3rd gen 750 and have extra vent ports on them for hook up to a charcoal canister. Even though the extra vents will most likely be capped in the futur, I'd like to keep the set stock for now if at all possible.
        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

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          #19
          No problems. Just thinking of plan B. Don't have anything that new anyway. LOL Good luck with the repair.
          http://img633.imageshack.us/img633/811/douMvs.jpg
          1980 GS1000GT (Daily rider with a 1983 1100G engine)
          1998 Honda ST1100 (Daily long distance rider)
          1982 GS850GLZ (Daily rider when the weather is crap)

          Darn, with so many daily riders it's hard to decide which one to jump on next.;)

          JTGS850GL aka Julius

          GS Resource Greetings

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            #20
            Here is the Torx trick in operation:

            See my blog: Stripped Pilot Screw







            Richard
            sigpic
            GS1150 EF bought Jun 2015
            GS1150 ES bought Mar 2014: ES Makeover Thread AND blog: Go to the Blog
            GS1100 G (2) bought Aug 2013: Road Runner Project Thread AND blog: Go to the Blog
            GS1100 G (1) Dad bought new 1985 (in rebuild) see: Dad's GS1100 G Rebuild AND blog: Go to the Blog
            Previously owned: Suzuki GS750 EF (Canada), Suzuki GS750 (UK)(Avatar circa 1977), Yamaha XT500, Suzuki T500, Honda XL125, Garelli 50
            Join the United Kingdom (UK) Suzuki GS Facebook Group here

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              #21
              This photo is kind of crap but it shows the corrosion on the threads. Note that the corrosion was above the screw, thus preventing removal. I broke this piece trying to remove the plug over the screw. Going to try to JB Weld it back on after the dipping is done.

              corrosion.jpg
              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


                #22
                Got the tap and it cleaned up the hole beautifully. Used it on all the carbs and the threads are all nice and smooth now. I'm counting that tap as an excellent $10 purchase.

                Glued that chunk of busted pilot screw tower back on using some high strength 3M DP420 epoxy and it went back in place nicely. I don't think fuel gets up to the threads, or at least it shouldn't, so I think the fix should be good. The tap came in handy there too; it screwed in nicely and the threads all lined up well. It's nice when something goes well.
                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


                  #23
                  Only that could hurt the epoxy is heat..and it doesnt get the carbs that hot to effect anything.
                  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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                    #24
                    Originally posted by Nessism View Post
                    Got the tap and it cleaned up the hole beautifully. Used it on all the carbs and the threads are all nice and smooth now. I'm counting that tap as an excellent $10 purchase.

                    Glued that chunk of busted pilot screw tower back on using some high strength 3M DP420 epoxy and it went back in place nicely. I don't think fuel gets up to the threads, or at least it shouldn't, so I think the fix should be good. The tap came in handy there too; it screwed in nicely and the threads all lined up well. It's nice when something goes well.

                    Nice to hear that worked out, was that a Chinese made tap and where did you get it?

                    I have replaced all my low quality taps in the smaller sizes as I tried tapping stainless steel and ruined them, the taps were fine for alum and mild steel but turned to cheese when used with stainless.

                    For your carbs it's only cutting soft material so even if it's not made from quality tool steel it should be OK for a good while.
                    2018 Honda Africa Twin AS
                    2013 DR 650 Grey, sold 1981 GS 650E Silver,

                    1980 GS1000ST Blue & White, X2

                    2012 DL650 Vstrom Foxy Orange, in storage
                    1981 CT110 X2 "Postie Bikes" Gone to a New Home.
                    2002 BMW 1150 GS Blue & White - Sold
                    1975 BMW R90/6 Black - Sold 1984 GS1150EF Sold
                    1982 BMW R100 Africa trip, Stolen - Recovered- Sold
                    1977-1980 Suzuki GS550, GS1000E, GS1000S GSX750, GSX1100,s
                    Hondas ST90, CR125 CB175 , CB350 CB750, NSU Quickly, Yamaha RD's 350/400,

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                      #25
                      Originally posted by Kiwi Canuck View Post
                      Nice to hear that worked out, was that a Chinese made tap and where did you get it?

                      I have replaced all my low quality taps in the smaller sizes as I tried tapping stainless steel and ruined them, the taps were fine for alum and mild steel but turned to cheese when used with stainless.

                      For your carbs it's only cutting soft material so even if it's not made from quality tool steel it should be OK for a good while.
                      This is the one I bought. It's HHS and the quality seems good. No doubt it's from China but it's decent regardless.
                      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

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