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Diaphram Assembly, HELP..........

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  • Diaphram Assembly, HELP..........

    I went out the other day to go for a ride and gas is leaking all over the side of my bike! I changed all the lines and got new clampsm and it seems to be leaking out of my Diaphram Assembly, or octopus as I have heard it called. I need to ask a few questions to see what to do, I've heard you can just bypass it and get rid of it all together? Do they make a rebuild kit for it? A new complete one is over $50! Does anyone have a good used one for sale? Thanks and I will be visiting here often or just email me, Great Site Also!!!!
    1980 XS 1100 Special SG
    "White Lightning"

  • #2
    K&L makes a rebuild kit, it comes with the stuff to rebuild both petcocks and the 'diaphram valve' cost is $20 or so I think, and any bike shop can get these because Tucker-Rocky and all the big suppliers to bike shops sell them.

    You only live about 2hrs south of me, I hope you are planning on attending XSEast 2003!
    Gary Granger
    Remember, we are the caretakers of mechanical art.
    2013 Suzuki DR650SE, 2009 Kawasaki Concours 1400, 2003 Aprilia RSV Mille Tuono

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    • #3
      octopus ectomy

      I have one with and 1 without an octopus..

      the one without has both lines from the petcocks to a t then one line to the carbs for that side...

      The petcocks work in all positions, and i just have to remember to shut off the fuel when i shut it off..

      I have the old one off Rusty, i'd give ya for shipping, but ill warn u its been sittin for 15 years... so im not sure its any better than yours..
      jeff "Wags"
      Bothell, Wa

      79sf mongrel
      79sf rusty
      79 partsbike almost complete

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      • #4
        rOOsty,

        If you take the diaphram assembly apart, you will see that you only have an O-ring to replace to make it control the flow of fuel. It's small, about 1/4". Shouldn't cost you more that 50 cents.
        Bill Murrin
        Nashville, TN
        1981 XS1100SH "Kick in the Ass"
        1981 XS650SH "Numb in the Ass"
        2005 DL1000 V-Strom "WOW"
        2005 FJR1300 Newest ride
        1993 ST1100 "For Sale $2,700" (Sold)
        2005 Ninja 250 For Sale $2,000 1100 miles

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        • #5
          Hi rOOsty,
          I had a torn diagphram in mine. I used the K&L Petcock rebuild kit on my special. It was $35.00 at a local bike shop. It fixed all the probelms with the 'octopus' - as some of you call it. Seems to be easier to fix the 'octopus' then bypassing/eliminating it. In the K&L kit there is everything to rebuild both petcocks and the single vacuum diagram. Don't forget to replace all the fuel line, one line at a time to keep from getting confused. I used the newer Gray Tyglon line. I think yglon is what it was called.

          There is a place called partsnmore that has petcock rebuild kits for the XS1100 E/F/G/H Standard Models that is like $13.00 each(x2). They do not list a kit for specials though. I have not dealt with them (yet), and am not affiliated with K&L or www.partsnmore.com. just trying to help
          Bill Woods
          1981 Yamaha XS1100SH (Eleven Special)
          1985 Kawasuki GS425 Mojave ATV
          2006 Yamaha Wolverine 450 4x4 ATV

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          • #6
            A BIG Thanks!!!!!!!!

            Thanks alot guys, now I have something to go by, I think I'll rebuild it all, and be done with it.
            SixtySix, tell me more of this XS East?? I never heard of it, where, and when??
            Jdwags, Thanks for the offer man I really appreciate it!! Nice to know that there is some good guys like us left out there!!
            nashville_bill, and Bill_Woods, Thanks for the info and advice!!
            Keep the shiney side up fellas!!


            1980 XS 1100 Special SG
            "White Lightning"

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            • #7
              Another option.

              Hello there,

              I just fixed my octopus yesterday. It had a vacuum leak causing my number two carb to run lean. I used a diaphram out of a XS11 Standard petcock. Exactly the same and you dont have to buy a complete kit for everything.

              Good Luck.
              Jeremy

              1979 XS11 Special
              2002 Ducati ST4S
              2012 BMW F800R
              1981 Suzuki GS450E
              1982 Honda XL500R

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