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Thread: Center stand is touching the oil pan...??

  1. #1

    Center stand is touching the oil pan...??

    Hello MOA, first time posting here. I recently picked up a '78 R100/7 with the intent of enjoying the work it takes to keep a vintage machine in good order.

    One of the first gremlins I have noticed has to do with the center stand. When engaged (down), the cross member is in contact with the oil pan. I am smart enough to know that even a little bit of weight on the oil pan is something i'd like to avoid.

    My question is, was there great variance in the geometry of the airhead's center stands over the years? I really would like to swap this out ASAP!

    Many thanks in advance,
    GB
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  2. #2
    Liaison 20774's Avatar
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    Welcome to the forum and to your new-to-you BMW, GB!

    Can you tell us if both wheels are touching the ground when using the center stand? It appears that the oil pan is stock. However, it appears that the stand has gone over center too much, indicating that the physical stops on the stand may have worn down. I also wonder if that's a stock stand. I can't see enough of the driver's side, but I don't see a tang that is welded to the left side to help pull down the stand from its up-position.
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #3
    Registered User STEVENRANKIN's Avatar
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    Stand

    It does look like you have a stock center stand. It is not a Reynolds ride off stand. It does look like a regular stock oil pan, not a deep pan or extended one.

    So, one, it is possible the stand is the wrong one for the bike. Two the mounts are worn out. Three, the mounts are bent on the frame.

    The broken tang is usual for a bike where the stand is used incorrectly or something is wrong with the stand. A lot of people put weight on it when lifting the bike up onto the stand instead of using it to pull the stand down to the ground an placing the foot over the bottom rung.

    I can't recall if there is a part number of any kind stamped on the stock stands. I don't have the measurements for the stock stands.

    Is the bike in original condition or has it been modified? St.

  4. #4

    I respectfully disagree

    That oil pan looks to be a deep pan probably a Mac deep oil pan. I have one as well as several stock ones to compare and use the 100 mm bolt head size and center stand tubes as a gauge it really looks to be a Mac deep one. If the OP could provide a measurement of the depth of the oil pan it could be compared to one of my examples.

    Also of note I have several center stands and on some the cross tube (the one shown hit the oil pan) are set at different distances from the mounts. which could also cause contact with the oil pan.

  5. #5
    Registered User 6322's Avatar
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    Not sure if it's a Mac pan but it looks like the factory one on my '83 R80ST, which is definitely different than the one on my '77 R100/7 dirt hack. Your issue may be a combination of the oil pan and centerstand.

    From the '77
    IMG_8234.PNG

    From '80

    IMG_8233.PNG
    Last edited by 6322; 09-16-2020 at 02:38 PM.
    Gary Phillips - #6322
    Wildland Firefighter, Retired, Riggins, ID
    Heartland Moto Locos BMW Riders
    '77 R100/7 Dirt Hack, '83 R80ST, '85 K100RS w/EML, '93 K1100LT, '00 R1100RS

  6. #6
    Registered User GTRider's Avatar
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    In the photo it looks like the stand is resting near the very ends of the curved feet. A photo from the side, without the cardboard, would clarify that and also give an idea on the angle of the deployed stand. When my R100GS started resting on it’s toes like that and the skidplate got close to the pan, it was a clear sign of wear in the centerstand and bushings. Also notable were the increase in the angle of the stand and the effort required to get the bike on and off the stand.

    Rebuilding the stand and replacing the bushings solved the problem.

    Best,
    DeVern
    DGerber
    1983 R80ST — 1984 R80 G/S-PD — 2004 K1200GT w/Hannigan S/C — 2010 K1300GT — 2018 R1200GS
    BMWMOA#52184, AMA#271542, IBA#138

  7. #7
    MOA #24991 Pauls1150's Avatar
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    Besides worn bushings, and possibly the stand's thru holes too, I'm with Kurt on this one - look closely at the top corners of the stand (both sides) where they "stop" against the frame, they're likely a bit mashed, and possibly the frame contact points too.

    Later stands (?) had a little conical hole to squirt grease into.

    I've put deeper pans on a few airheads (my two R75s, a friend's R90, and my R100RT) and there was never an interference issue since the "deeper" addition was towards the front; I do seem to recall that one manufacturer included a warning in its advertising that it would not fit certain bikes due to interference, and one manufacturer even had a semi-cylindrical clearance on the bottom to accept the crosspiece.
    Last edited by Pauls1150; 09-16-2020 at 04:05 PM.

  8. #8
    Registered User STEVENRANKIN's Avatar
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    Deep pan

    I have a deep pan on my RS, I never had a problem with the stock Center stand.

    I did find however replacing it with a ride off stand the proper ride off stand has to be used. St.

  9. #9

    I looked at my 79 R100S

    It does appear that the oil pan could very well be a stock one, I stand corrected.

    I did confirm that there are two different center stands, one with the top brace tube welded higher up and closer to the top than the other one. My 1975 R 90/6 and R 90S and R 60/6 all have that top brace tube attached about 1 1/2" higher on the stand than the center for my "79 R 100S. I have the original center stand and a new replacement center stand for the '79 R 100S and both are identical to each other but different from the originals on the /6 bikes. My R 90S has a deep oil pan on it and the back portion of the cooling fins have been ground off to allow clearance for the center stand cross tube.

  10. #10
    The stand is going to far "over center". That means either that the stops are worn or that the mounts/bushings are worn. I bet that it is a bear to get off the centerstand on a smooth garage floor. Voni had an R65 with a stand like that and we could push it all around the garage on the center stand and it wouldn't even try to fold the stand up like a good little bikey.
    Last edited by PGlaves; 09-17-2020 at 12:20 AM.
    Paul Glaves - "Big Bend", Texas U.S.A
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  11. #11
    Liaison 20774's Avatar
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    I still think it's a stock pan. Anton has pictures of the various pans:

    http://largiader.com/tech/oilpan/
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  12. #12

    A few pictures of the different center stands

    Side by side are the stock center stands, one from my '75 R 60/6 and the other from my '79 R 100S. Note the difference in the location of the cross tube in relation to the pivot points and spring mounts. Also the 3rd picture shows the stock center stand mounted and deployed on my '75 R 90S with near perfect frame tabs and new bushings. The angle is very close to what the OP has with his center stand, also it shows that the fins on the deeper oil pan have been ground down in order to provide clearance for the cross tube on the earlier Airhead center stand which is about 2 inches closer to the pivot points than what came on the post /6 bikes that had a deeper oil pan.
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  13. #13
    Quote Originally Posted by 20774 View Post
    Welcome to the forum and to your new-to-you BMW, GB!

    Can you tell us if both wheels are touching the ground when using the center stand? It appears that the oil pan is stock. However, it appears that the stand has gone over center too much, indicating that the physical stops on the stand may have worn down. I also wonder if that's a stock stand. I can't see enough of the driver's side, but I don't see a tang that is welded to the left side to help pull down the stand from its up-position.
    Hello, and many thanks for the welcome. While in this position, the rear wheel is touching the ground. The front is 2" off the floor. The tang is missing sadly. Since posting I have ordered a replacement center stand, one that features only the single cross member (which I did not know were available). I hope that the replacement remedies most of the above issues. I will certainly update the thread on this progress.

  14. #14
    Quote Originally Posted by STEVENRANKIN View Post
    It does look like you have a stock center stand. It is not a Reynolds ride off stand. It does look like a regular stock oil pan, not a deep pan or extended one.

    So, one, it is possible the stand is the wrong one for the bike. Two the mounts are worn out. Three, the mounts are bent on the frame.

    The broken tang is usual for a bike where the stand is used incorrectly or something is wrong with the stand. A lot of people put weight on it when lifting the bike up onto the stand instead of using it to pull the stand down to the ground an placing the foot over the bottom rung.

    I can't recall if there is a part number of any kind stamped on the stock stands. I don't have the measurements for the stock stands.

    Is the bike in original condition or has it been modified? St.
    Thank you Steven, the bike is not in it's original condition. It's been "restored." I am going through everything now to make corrections etc. I appreciate your insights above, thanks!

  15. #15
    Liaison 20774's Avatar
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    Quote Originally Posted by georgebarthel View Post
    While in this position, the rear wheel is touching the ground. The front is 2" off the floor.
    Good...that's the way it should be so the stand isn't deformed in any way. It's just the wrong stand!
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

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