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  • oil on the good foot

    looks like oil is coming out of the vacuum advance
    80 G

  • #2
    Originally posted by speedlimit85 View Post
    looks like oil is coming out of the vacuum advance
    could be the crankshaft seal behind it. part number
    93101-32087-00
    2 - 80 LGs bought one new
    81 LH
    02 FXSTB Nighttrain
    22 FLTRK Road Glide Limited
    Jim

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    • #3
      I just did one of these crankshaft seals, it is a real pita getting the old one out. The seal has a lip on it that rides in a groove. You really have to destroy the old seal to remove it, trying not to gouge the aluminum case or scratch the crankshaft. The replacement seals don't have the lip, so installation is a breeze.
      Last edited by bikerphil; 05-03-2022, 10:23 AM.
      2H7 (78)
      2H7 (79)
      3H3

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      • #4
        Thank you. I'm studying whether this is a job I can do without breaking something or if I should ask the mechanic here.
        80 G

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        • #5
          It took me about 30 minutes to get this seal out...

          Click image for larger version

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          2H7 (78)
          2H7 (79)
          3H3

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          • #6
            There's a plug with an o-ring. I should try that first. Right under the cover, it might be leaking from there.
            80 G

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            • #7
              O-RING

              93210-18319-00

              This one?
              80 G

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              • #8
                Originally posted by speedlimit85 View Post
                O-RING

                93210-18319-00

                This one?
                Your original post said the leak was behind the vacuum advance (left side)

                That O-ring goes onto the oil galley plug on the right side.

                Edit: Thanks bikerphil for correcting - apparently there is another O-ring on the left side as well
                Last edited by Radioguylogs; 05-04-2022, 09:19 PM.
                -Mike
                _________
                '79 XS1100SF 20k miles
                '80 XS1100SG 42k miles
                '81 XS1100H Venturer 35k miles
                '79 XS750SF 20k miles
                '85 Honda V65 Magna ~7k miles
                '84 Honda V65 Magna 48k miles (parts bike)
                '86 Yamaha VMAX 7k miles

                Previous: '68 Motoguzzi 600cc + '79 XS750SF 22k miles +'84 Honda V65

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                • #9
                  Hey Eric...

                  Yes, there is an O-ring that goes on the left side oil galley plug which is located directly under the ignition cover. The one you listed above is the correct one. It could be the source of your leak, won't hurt trying that first. If you want to save some time and money, go to your local hardware store and ask them for a #14 O-ring which is the proper size. When replacing, take care not to over tighten that plug, they will snap off rather easily, the plug is very cheaply made.

                  I hope that the O-ring is the problem, that is an easy fix.
                  Last edited by bikerphil; 05-04-2022, 10:00 AM.
                  2H7 (78)
                  2H7 (79)
                  3H3

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                  • #10
                    You just saved me money and time, but it's the seal.
                    80 G

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                    • #11
                      There is one more thing you could try (if you are up for it) before digging out the old seal. If you remove the ignition cover and all the components, you will be looking at the seal. You will notice that the seal has actually shrunk and there is oil around the outside of the seal. Often it is actually leaking around the outer circumference and not the inner part. You can spritz some brake cleaner all around the outside edge to clean the oil away and smear a thin layer of RTV gasket maker around it covering the gap. Overlap it from on the seal itself to the aluminum case, it doesn't have to be pretty. Let it cure overnight. Reassemble the ignition components and hope for the best. I have had success on several bikes with this procedure on both (left and right) crankshaft seals and it has lasted many years before eventually leaking from the center area of the seal.

                      Good luck on whichever repair you end up doing.
                      Last edited by bikerphil; 05-04-2022, 02:04 PM.
                      2H7 (78)
                      2H7 (79)
                      3H3

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                      • #12
                        Do you know the o-ring # on the cam chain tensioner bolt?
                        80 G

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                        • #13
                          Originally posted by speedlimit85 View Post
                          Do you know the o-ring # on the cam chain tensioner bolt?
                          No, I'm sorry I don't, I've gotten rid of the leaky manual adjust tensioner on all my bikes long ago and upgraded to the auto adjusting type.

                          Anytime you fool with the cam chain tensioner, be aware the cam chain may skip out of time damaging the engine if you don't do everything exactly right.
                          2H7 (78)
                          2H7 (79)
                          3H3

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                          • #14
                            Originally posted by speedlimit85 View Post
                            Do you know the o-ring # on the cam chain tensioner bolt?
                            Yamaha 93210-06632-00 - O-RING | Partzilla.com

                            I too would highly recommend that you replace the OEM tensioner setup with an older vmax 1200 automatic cam chain tensioner. Install it and basically forget about it for while.
                            2 - 80 LGs bought one new
                            81 LH
                            02 FXSTB Nighttrain
                            22 FLTRK Road Glide Limited
                            Jim

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                            • #15
                              Alright. I'm gonna have to replace the seal or rtv it. Oil on pick up coils. I am told to put a sheetrock screw into the old seal and pull. Any other ways?
                              But first, how do I start? The timing was factory set with bolts. Mark the timing? Pliers? Hammer in screw grooves? The shop that welded my exhaust won't touch this seal.
                              80 G

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