Vacuum nipple wrong side?

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  • StubbornDutchman
    • Feb 2026

    #1

    Vacuum nipple wrong side?

    I just bought a new petcock from CRCII and after a month and a half it finally came in. The prime nipple is on the same side as my original one but the vacuum nipple is on the same side as the prime. Which is opposite of the original one. Can I just take those 4 screws out and spin it around or will something be misaligned inside? My vacuum hose isn't long enough to reach around the other side without kinking.
  • chuck hahn
    Forum LongTimer
    Past Site Supporter
    • May 2009
    • 25918
    • Norman, Oklahoma

    #2
    The diaphram is trapped by the backing plate held on by the screws. Its often NOT a good idea to break the seal from ..in my opinion. I would first try getting some more vac line and seeing if it can be routed differently as to not be kinked.
    Last edited by chuck hahn; 02-21-2014, 10:06 PM.
    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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    • tkent02
      Forum LongTimer
      Past Site Supporter
      • Jan 2006
      • 35571
      • Near South Park

      #3
      I haven't had any problems taking them apart.
      http://img.photobucket.com/albums/v5...tatesMap-1.jpg

      Life is too short to ride an L.

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      • JEEPRUSTY

        #4
        Nipple? NIPPLE NIPPLE NIPPLE NIPPLE!
        Nipple............................................ ....
        Nothing to add I just love repeating the word.
        hijack?

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        • chuck hahn
          Forum LongTimer
          Past Site Supporter
          • May 2009
          • 25918
          • Norman, Oklahoma

          #5
          Unless you eventually tear a diaphram breaking the halves apart..then it wasnt a good idea. Theres nothing but a spring in there as far as "loose" parts goes.
          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.

          Comment

          • StubbornDutchman

            #6
            Originally posted by chuck hahn
            The diaphram is trapped by the backing plate held on by the screws. Its often NOT a good idea to break the seal from ..in my opinion. I would first try getting some more vac line and seeing if it can be routed differently as to not be kinked.
            Aaaaannnd this is why I ask questions before pulling something apart when i'm unsure. Thanks very much. Good thing my local motorcycle shop hands out free fuel line.

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            • Steve
              GS Whisperer
              • Jun 2005
              • 35924
              • southwest oHIo

              #7
              I am still trying to figure out what the "prime nipple" is.
              Originally posted by StubbornDutchman
              The prime nipple is on the same side ...
              .
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              #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
              #2 son: 1980 GS1000G
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              • tkent02
                Forum LongTimer
                Past Site Supporter
                • Jan 2006
                • 35571
                • Near South Park

                #8
                Must be the big one in the middle.
                http://img.photobucket.com/albums/v5...tatesMap-1.jpg

                Life is too short to ride an L.

                Comment

                • tom203
                  Forum Guru
                  Past Site Supporter
                  • Aug 2010
                  • 8925
                  • Norway,Maine

                  #9
                  Originally posted by StubbornDutchman
                  ...The prime nipple is on the same side as my original one but the vacuum nipple is on the same side as the prime. Which is opposite of the original one.
                  Both the feed and vacuum fittings should point to rear on this model - I've seen 3 setups.
                  1981 gs650L

                  "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

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