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  • #1

    Middle Drive Filler Plug

    When I went to change the Middle drive oil, I noticed the filler plug allen hole has been stripped by the previous owner. I will slot it with a dremel to get it out, but I would like to know what size bolt it is so I can get one ahead of time.

    Thank you,

    Steve
    79 XS1100 SF
    Tags: None
  • #2
    Both the middle and final drive drain and fill plugs are the same thread, as well as the pol drain plug. All can be interchanged as the threads are the same.

    Although the final drive fill plug needs to be a little shorter than the others.

    When you get a new fill plug for the middle get one for the final as well, same crappy Allen hole.
    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

    • #3
      Its 14 X 2 mm. I had the same problem with my final drive bung, I ended up welding a nut to it, ( the heat helps loosen it ) presto. My middle drive bung was in good condition but I still couldn't get it undone even with a pipe on the allen key, so I took the bike for a short ride to warm everything up ( thanks Brian W ) then tried again, got it.
      80 SG
      93 ST1100 Honda
      66 split screen VW bus

      Comment

      • #4
        great, thank you both.
        79 XS1100 SF

        Comment

        • #5
          Go one better, replace them both (mid and final) with a magnetic hex head drain plug, no more allen!:

          A standard Suzuki part, BikeMaster number FHM050-S14-12.5

          Former owner, but I have NO PARTS LEFT!

          Comment

          • #6
            Amazon.com sells 'em:

            http://www.amazon.com/BikeMaster-Ste.../dp/B003177B4C
            Former owner, but I have NO PARTS LEFT!

            Comment

            • #7
              Originally posted by DAVINCI View Post
              Amazon.com sells 'em:

              http://www.amazon.com/BikeMaster-Ste.../dp/B003177B4C
              Thank You ! $18.90 free shipping for 2
              76 XS650 C ROADSTER
              80 XS650 G Special II
              https://ibb.co/album/icbGgF
              80 XS 1100 SG
              81 XS 1100LH/SH DARKHORSE
              https://tinyurl.com/k6nzvtw
              AKA; Don'e, UD, Unca Don'e

              Comment

              • #8
                You can get the magnetic drain plugs at the auto parts store for $2-4.
                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
                  Yes, true, Nate but it's hard to find the ones with the narrow shoulder on them to fit the final drive. At least, that's what I've found. Some of the guys have ground them down to fit, but that's not my preference.
                  Former owner, but I have NO PARTS LEFT!

                  Comment

                  • #10
                    That is true. This is only a problem for the final drive whith the recessedseating surface. I just held my cheap bolt lightly in my fingers and let it roll as I held it to the bench grinder. Took it down just right and fits perfect.
                    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
                      Correction , its 14 x 1.5 not 14 x 2 as I stated earlier, that one from Amazon is 14 x 1.25 so be careful,
                      80 SG
                      93 ST1100 Honda
                      66 split screen VW bus

                      Comment

                      • #12
                        There is no problem at all with the stock ones if you use a nylon washer.
                        Skids (Sid Hansen)

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

                        Comment

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