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What is that oil drain plug on the left side of the crank?!

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  • #1

    What is that oil drain plug on the left side of the crank?!

    I had a small leak of oil there so I went to tighten it and the head broke off spewing oil everywhere!

    I've since ordered and installed a new plug, but I am still not sure what that plug is for... Is it the gear or engine oil?

    I've read through forums on this site and checked the service manual and i believe it to be gear oil, but I am not 100% sure yet, so I am now resorting to this thread.

    I am eager to ride! Please help!

    Kyle
    79 XS11 w/sidecar
    Tags: None
  • #2
    That's not a drain plug... it's a oil galley seal. Not meant to be routinely removed.
    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...

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    • #3
      Originally posted by out2seakyle View Post
      I had a small leak of oil there so I went to tighten it and the head broke off spewing oil everywhere!

      I've since ordered and installed a new plug, but I am still not sure what that plug is for... Is it the gear or engine oil?

      I've read through forums on this site and checked the service manual and i believe it to be gear oil, but I am not 100% sure yet, so I am now resorting to this thread.

      I am eager to ride! Please help!

      Kyle
      With that, you seriously ought to consider getting a manual or downloading the one off this site before you have or create an issue that will keep you from riding that bike for a l-o-n-g time........just a word to the wise....
      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.

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      • #4
        That (Engine) oil galley goes all the way through the motor. On the left side, there's that screw in plug. On the right side, there's simply a push-in plug with an O-ring and your alternator cover holds it in place. A few people have been dumb enough to fire up the bike with that alternator cover off for whatever reason. That oil galley is under 100% oil pressure, so it will shoot that plug out a great distance if you were to blip the throttle a little, along with a large amount of your oil all over your leg as you drink coffee one morning. You know... so I hear anyway.
        Try your hardest to be the kind of person your dog thinks you are.

        You can live to be 100, as long as you give up everything that would make you want to live to be 100!

        Current bikes:
        '06 Suzuki DR650
        *'82 XJ1100 with the 1179 kit. "Mad Maxim"
        '82 XJ1100 Completely stock fixer-upper
        '82 XJ1100 Bagger fixer-upper
        '82 XJ1100 Motor/frame and lots of boxes of parts
        '82 XJ1100 Parts bike
        '81 XS1100 Special
        '81 YZ250
        '80 XS850 Special
        '80 XR100
        *Crashed/Totalled, still own

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        • #5
          So it is the engine oil. Thanks Steve and Trbig.
          79 XS11 w/sidecar

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          • #6
            Originally posted by trbig View Post
            if you were to blip the throttle a little, along with a large amount of your oil all over your leg as you drink coffee one morning. You know... so I hear anyway.
            Nice, sounds like you know the drill.
            79 XS11 Special (Lazarus)
            80 XS850 Special (Old Faithful)
            80 XS11 Standard sorta stock (Beatrice)
            79 DT 100

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            • #7
              What's yours?

              Hi Kyle and welcome,
              great you found out what the plug was for and yeah, buy or download the book.
              BTW, what sidecar do you have, could you post a photo (via photobucket)?
              You can see my chair via the search button, type in "why I ride a sidecar rig"
              Fred Hill, S'toon
              XS11SG with Spirit of America sidecar
              "The Flying Pumpkin"

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              • #8
                I thought I was about to replace the left side crank seal. Under close inspection, it doesn't appear to be leaking. It's more likely the screw in seal below the cover. Does anyone here have the dimensions of the o'ring seal? 93210-18319-00 is the part number.
                Marty (in Mississippi)
                XS1100SG
                XS650SK
                XS650SH
                XS650G
                XS6502F
                XS650E

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