Announcement

Collapse
No announcement yet.

petcocks for 79 special?

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • petcocks for 79 special?

    Ok so my petcocks are leaking horribley and the are in the off position I have rebuilt them and still they leak I'm lost and need help is there another fix or what guys help me out here

  • #2
    You could try bending the wave washer a bit to tighten up the pressure on the selector mechanism. When you say they are leaking from the off position, are they dripping on the engine or still leaking thru the spigot?
    2H7 (79) owned since '89
    3H3 owned since '06

    "If it ain't broke, modify it"

    Comment


    • #3
      Petcock

      They are kinda basic, if you put new gaskets and seals in them. Did you make sure the post was lined up with one of the 4 holes in the new gasket and press in the lever without twisting the seal out of place Also, the two screws can leak if not OEM with good gasket / washers on them, and check to make sure the tank is metal to seal on the "O" ring that mates it (the factory seals are ovel not round, but the round ones will work
      Originally posted by Jelmo11 View Post
      Ok so my petcocks are leaking horribley and the are in the off position I have rebuilt them and still they leak I'm lost and need help is there another fix or what guys help me out here
      1979 XS1100 Special (Mad Max, OEM) Current
      1980 XS1100 Special
      1990 V Max
      1982 KZ750 LTD Twin
      1986 700 FZR Yamaha Fazer (faster then expected)
      1979 XS750 Special (my 1st Special)
      1974 CB750-Four



      Past/pres Car's
      1961 Catalina 389/1970 Torino GT 351/1967GTO 12to1 comp./ Roller cam/ T-10/ 456 gear/Tri-power/1967 GTO 400, 1969 Camaro, 1968 Z28, 2001 BMW M Roadster 0 to 60 in 4.5 sec. Jaguar XK8

      Comment


      • #4
        That would be my question, did you actually install new seals, or just take them apart and clean them out? It's the seals that go bad usually, so leakers almost always need new ones. A couple of other things to check, is the lever 'face' (that goes against the large seal) smooth/flat? If that's damaged, they can be impossible to stop from leaking. Sometimes 'resurfacing' that on some ultra-fine sandpaper until all pits/scratches are gone will do the trick, but again, you'll need new seals as the originals will probably be bad from the bad lever. Also make sure the surface that goes against the tank is flat; I've seen these slightly bent and they won't seal. If you pull the filter towers off, run a file across the surface until it's flat.
        Fast, Cheap, Reliable... Pick any two

        '78E original owner - resto project
        '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
        '82 XJ rebuild project
        '80SG restified, red SOLD
        '79F parts...
        '81H more parts...

        Other current bikes:
        '93 XL1200 Anniversary Sportster 85RWHP
        '86 XL883/1200 Chopper
        '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
        Cage: '13 Mustang GT/CS with a few 'custom' touches
        Yep, can't leave nuthin' alone...

        Comment


        • #5
          Petcock? am I allowed to say that?

          As to the inside of your petcocks being to rough to not seal, never heard of that, as they are sealed from MFG till now? Just make sure that the "NEW" gasket is in place with the post that holds it there If you are useing old gaskets and seals, BUY NEW ONES, they are cheap and all over Ebay and others And remember, the gas might be leaking from the tank seal / screws most dont leak from inside if rebuilt
          1979 XS1100 Special (Mad Max, OEM) Current
          1980 XS1100 Special
          1990 V Max
          1982 KZ750 LTD Twin
          1986 700 FZR Yamaha Fazer (faster then expected)
          1979 XS750 Special (my 1st Special)
          1974 CB750-Four



          Past/pres Car's
          1961 Catalina 389/1970 Torino GT 351/1967GTO 12to1 comp./ Roller cam/ T-10/ 456 gear/Tri-power/1967 GTO 400, 1969 Camaro, 1968 Z28, 2001 BMW M Roadster 0 to 60 in 4.5 sec. Jaguar XK8

          Comment


          • #6
            better pictures

            Hey, my new leaf, here is a completly covered babe that I hope I can share

            1979 XS1100 Special (Mad Max, OEM) Current
            1980 XS1100 Special
            1990 V Max
            1982 KZ750 LTD Twin
            1986 700 FZR Yamaha Fazer (faster then expected)
            1979 XS750 Special (my 1st Special)
            1974 CB750-Four



            Past/pres Car's
            1961 Catalina 389/1970 Torino GT 351/1967GTO 12to1 comp./ Roller cam/ T-10/ 456 gear/Tri-power/1967 GTO 400, 1969 Camaro, 1968 Z28, 2001 BMW M Roadster 0 to 60 in 4.5 sec. Jaguar XK8

            Comment


            • #7
              Originally posted by XS1100_OEM4ME View Post
              Hey, my new leaf, here is a completly covered babe that I hope I can share

              Hi Lon,
              not if you don't stop shuffling your photobucket albums, even the XS11 link in your signature don't connect.
              Fred Hill, S'toon
              XS11SG with Spirit of America sidecar
              "The Flying Pumpkin"

              Comment


              • #8
                I have opened up a petcock or two that had the maing surface of the lever pitted from sitting in bad gas or empty tank. Using 600 grit paper followed by 1000 grit cleaned them up nicely.
                Life is what happens while your planning everything else!

                When your work speaks for itself, don't interrupt.

                81 XS1100 Special - Humpty Dumpty
                80 XS1100 Special - Project Resurrection


                Previously owned
                93 GSX600F
                80 XS1100 Special - Ruby
                81 XS1100 Special
                81 CB750 C
                80 CB750 C
                78 XS750

                Comment

                Working...
                X