Torn slide diaphragm

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  • Poopwink
    #1

    Torn slide diaphragm

    I broke into my carbs tonight and ran into a few issues--1st, my '82 450TXZ does not have BS Mikuni carbs...which came as a surprise to me and means I have two carb rebuild kits I can't really use. I lined everything up using Ed Ness' incredibly thorough BS/CV Mikuni carb rebuild guide but I didn't do enough homework.

    The next issue is that one of the slide diaphragms has a tiny puncture in it, smaller than the tip of a thumbtack. I tried taking some photos but it's nearly impossible to tell there's anything there. I looked around the forums and found a discussion from 2004 saying new slide diaphragms were upwards of $100...am I just S.O.L. on this one?
    Tags: None
    • DaveOR
      #2
      I was reading through this thread earlier. http://www.thegsresources.com/_forum...d.php?t=207408

      There's quite a few links in there that might steer you in the right direction. Gives you something to look at while you wait for someone with more knowledge than me to reply!

        Comment

        • Poopwink
          #3
          Originally posted by DaveOR
          I was reading through this thread earlier. http://www.thegsresources.com/_forum...d.php?t=207408

          There's quite a few links in there that might steer you in the right direction. Gives you something to look at while you wait for someone with more knowledge than me to reply!
          Wow, lots of good info in there...not sure how I missed that thread. Thanks!

            Comment

            • Beerman73
              #4
              Try using the right stuff black rtv silicone , smear it lightly over the puncture and let dry a few days before reassembling. I fixed a Kawasaki carb diaphragm this way and it worked fine.

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                • Nessism
                  Forum LongTimer
                  GSResource Superstar
                  Past Site Supporter
                  Super Site Supporter
                  • Mar 2006
                  • 35787
                  • Torrance, CA
                  #5
                  You might want to try the Wanted To Buy forum. Lots of guys have spares they will cough up for cheap. I repaired a holed diaphragm using a bicycle tube repair kit. Park sells self adhesive patches that work a treat.
                  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

                    • Poopwink
                      #6



                      So these are the carbs that were on my bike. In various ways they don't match most of the carb rebuild guides I've consulted (for example, choke plunger & pilot screw in different location/configuration). This rebuild kit I bought from Parts N More also has a different gasket. It doesn't have a flap extending into the center (not sure how crucial that is) but I don't think it will fit around the posts that hold the float in place:


                      Can anyone help shed some light on what these carbs may be? Just a different year and configuration of BS carbs? Any other GS450 owners recognize these? The only thing I can see on 'em is "MIKUNI KOGYO CO.LTD JAPAN."

                      Thanks...


                      a

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