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  • #1

    Leak in exhaust joints

    Hey folks,
    Just re-installed my exhaust system after the dremel fix and I appear to have a leak at the joint were the the #2 pipe meets the muffler assembly. It seems well seated, and the clamps are tight. Am I missing something obvious? Are there any tricks to getting a better seal at those joints? If I can't get a good seal are there any cheats e.g. welding the joint, or JB Weld? I'd rather do it right, but if I can't get a seal the right way, I'll take what I can get.
    Thanks in advance.
    Pat
    Pat K

    80 XS11 "Special" Standard
    (80G chassis & engine w/ 79 SG lights and cluster)

    79 XS650 (engine currently squeals like a stuck pig.)

    72 Plymouth Satellite (met an unpaved manhole collar, which it managed to tear out of the street, currently has some "issues")

    04 Current Designs Solstice GT XL Kayak (I like it because it doesn't have carbs, or any other moving parts)
    Tags: None
  • #2
    A paste product available at most auto parts outlets called 'muffler weld'. It comes in a small tin, has the consistancy of watery pla-doh and is ideally suited for sealing exhaust system joints.
    It will work best if you disconnect the joints, apply the product then reassemble. It will dry, however heat will cure it, if there remain any small leaks, you can simply apply more to the leak and let it dry, just wear latex gloves when you use this stuff, it likes to stay on your skin a long time.
    '78 E "Stormbringer"

    Purrs like a kitten, roars like a lion, runs like a gazelle (being chased by a cheetah).

    pics http://s1209.photobucket.com/albums/...tormbringer45/

    Comment

    • #3
      Originally posted by patk12345 View Post
      Hey folks,
      Just re-installed my exhaust system after the dremel fix and I appear to have a leak at the joint were the the #2 pipe meets the muffler assembly. It seems well seated, and the clamps are tight. Am I missing something obvious? Are there any tricks to getting a better seal at those joints? If I can't get a good seal are there any cheats e.g. welding the joint, or JB Weld? I'd rather do it right, but if I can't get a seal the right way, I'll take what I can get.
      Thanks in advance.
      Pat
      I don't know much about specials, but there is a kind of "sleeve gasket" for the standards that is repacable.
      Skids (Sid Hansen)

      Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.

      Comment

      • #4
        Before PartsnMore redid their website, they sold exhaust sleeve seals for the xj11. My research says they fit all XS pipes. Maybe contact them and ask if they are still available.
        79SF
        XJ11
        78E

        Comment

        • #5
          Should still be able to get from a local dealer also. All three are the same, 3JJ-14653-00 is the part number I got off one I have.
          81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.

          Comment

          • #6
            For exhaust sealing (if the sleeves don't do the trick or ya can't find 'em and wanna ride!) a good product is Ultra Copper by Permatex. It remains flexible and does't harden. This is a good thing when yer talking about motorsickles that bump and vibrate. Plus it makes it easy to remove and reinstall yer exhaust. I usually put a smear on the exhaust gaskets too.

            Comment

            • #7
              An exhaust maker I know of recommended normal bathroom silicone sealer! I used it on my bike and it's fine......
              XS1100F 1980 European model. Standard. Dyna coils. Iridium plugs. XS750 final drive (sometimes). Micron fork brace. Progressive front springs. Geezer regulator/rectifier. Stainless 4 into 2 exhaust. Auto CCT (Venturer 1300) SOLD. New project now on the go. 1980 European model.

              Comment

              • #8
                Silicone is corrosive to steel.
                Nathan
                KD9ARL

                μολὼν λαβέ

                1978 XS1100E
                K&N Filter
                #45 pilot Jet, #137.5 Main Jet
                OEM Exhaust
                ATK Fork Brace
                LED Dash lights
                Ammeter, Oil Pressure, Oil Temp, and Volt Meters
                Green Monster Coils
                SS Brake Lines
                Vision 550 Auto Tensioner

                In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                Theodore Roosevelt

                Comment

                • #9
                  Mmm.... so's nitric acid..... the stuff that comes out in the exhaust fumes!
                  XS1100F 1980 European model. Standard. Dyna coils. Iridium plugs. XS750 final drive (sometimes). Micron fork brace. Progressive front springs. Geezer regulator/rectifier. Stainless 4 into 2 exhaust. Auto CCT (Venturer 1300) SOLD. New project now on the go. 1980 European model.

                  Comment

                  • #10
                    But your exhaust is stainless so neither really matter for you. But why apply something corrosive when a different non corrosive product works just as well or better.
                    Nathan
                    KD9ARL

                    μολὼν λαβέ

                    1978 XS1100E
                    K&N Filter
                    #45 pilot Jet, #137.5 Main Jet
                    OEM Exhaust
                    ATK Fork Brace
                    LED Dash lights
                    Ammeter, Oil Pressure, Oil Temp, and Volt Meters
                    Green Monster Coils
                    SS Brake Lines
                    Vision 550 Auto Tensioner

                    In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                    Theodore Roosevelt

                    Comment

                    • #11
                      Silicone itself is corrosive to steel. I think you will find that the composite they sell as caulk has some inhibitors in it to keep it from corroding the steel though. Kind of like antifreeze in your car, water is very corrosive to all metals, but they add inhibitors to protect steel and aluminum into the antifreeze.
                      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

                      • #12
                        Most silicone caulks I have looked at do specify not to use on bare steel.
                        Nathan
                        KD9ARL

                        μολὼν λαβέ

                        1978 XS1100E
                        K&N Filter
                        #45 pilot Jet, #137.5 Main Jet
                        OEM Exhaust
                        ATK Fork Brace
                        LED Dash lights
                        Ammeter, Oil Pressure, Oil Temp, and Volt Meters
                        Green Monster Coils
                        SS Brake Lines
                        Vision 550 Auto Tensioner

                        In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                        Theodore Roosevelt

                        Comment

                        • #13
                          True, my system is stainless. Mind you, having said that... after getting my stainless system made, and posting photos here.... I just sold it on eBay! Call me an XS1100 NERD but, there was no bevel at the end of the silencers as there should be on the UK E and F models. It began to irritate me instensely.... completely unreasonably too, I suppose. I did ask the person who made it to make sure he put the bevels on but he had flu and was ill when he made the system and he.... forgot!

                          I just took delivery of one of the stainless steel replica systems supplied by an eBay seller in Germany. It arrived 3 days after I ordered it and really is a substantial and well-made system. With bevels. I'm waiting for two OEM used silencer mounting brackets from the USA. As soon as I get them, I'll get the system on and post some more pix.
                          XS1100F 1980 European model. Standard. Dyna coils. Iridium plugs. XS750 final drive (sometimes). Micron fork brace. Progressive front springs. Geezer regulator/rectifier. Stainless 4 into 2 exhaust. Auto CCT (Venturer 1300) SOLD. New project now on the go. 1980 European model.

                          Comment

                          • #14
                            Back to the original issue of leaking exhaust. Other than replacing the doughnut inserts as they do get more compressed over the years another quick-fix would be to dremal cut the clamp stops which will allow the clamp to be pulled together a bit farther. Have made this work untill I got new inserts.
                            81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.

                            Comment

                            • #15
                              I seem to remember using strips of Coke can with exhaust paste on them at the exhaust joints......
                              XS1100F 1980 European model. Standard. Dyna coils. Iridium plugs. XS750 final drive (sometimes). Micron fork brace. Progressive front springs. Geezer regulator/rectifier. Stainless 4 into 2 exhaust. Auto CCT (Venturer 1300) SOLD. New project now on the go. 1980 European model.

                              Comment

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