R1200RS + R1250RS Forum
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Boot won’t stay in place.
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Sat Mar 16, 2024 10:04 pm
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This has been going on at least since I removed the driveshaft for inspection. The front of the boot keeps popping off. Grease and grime. It’s right above the rear universal joint of the shaft. Any ideas? I’m thinking I need to remove the shaft and reinsert it…if only to thoroughly clean the boot.
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Sorry, in case it matters, this is a 1200RS and not a 1250RS…if that matters.
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Oh well, this was a productive morning. I decided to remove the rear drive and inspect/clean the boot. The driveshaft wasn’t fully seated, although I don’t think that was the issue. It takes a good shove to fully seat it, and it isn’t much extra distance.
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Zitat von zer0netgain im Beitrag #3 That is what I have done when my forks needed service. I would think the tech would appreciate not having to remove it from the bike and that should save you some labor cost. I have known the tech at my dealer for almost 40 years and have a good relationship with them. Frank
2023 R1250RS- 6000 mi.
2003 R1100S Boxer Cup Replika #6/200 1985 K100/1100RS- 330,000 mi. 38 yrs. 2017 R1200RS- 51,070 mi, 5 yrs, (gone) 2016 R1200RS- 28,322 mi. 18 mo. (gone) 2011 R1200RT- 30,000 mi. 2 yr. (gone) 2005 R1200ST- 58,000 mi. 8 yr. 3rd deer killed it. 1999 R1100S- 15,000 mi. 2 yr. (gone) 1996 Ducati 900SS/SP- 89,000 mi. 12 yr. (gone) 500,000+ BMW miles |
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Zitat von zer0netgain im Beitrag #3 Refresh our memory - how many miles at this point?
“A good man always knows his limitations.”
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Fortunate that you caught this before it gave up completely. Don't think I've ever seen a report of this bearing failing, on the RS forums. |
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That disintegrating bearing was likely causing movement between the driveshaft tunnel and rear bevel drive unit. That may have been the reason for the rear boot popping open. Did you not feel undue movement or hear noise while riding?
Eventual master of the obvious
2020 BMW R1250RS Sport Austin yellow |
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I had this problem. The boot itself had lost its form due to aging. A new boot and all went together fine. |
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Zitat von Steady Eddie im Beitrag #8 No. But at the same time, the boot didn't dislodge after every ride. I never saw WHEN it happened. I suppose it took a certain motion for it to happen.
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Well, $135 in parts. I'll have to do it myself. Knoxville BMW is "busy" and won't commit to doing it on an appointment basis. Asheville BMW would prefer having the whole bike to test ride afterwards, but they say they don't even show the parts as available. Hopefully the parts will arrive soon.
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Zitat von zer0netgain im Beitrag #11 Looks like another $83 if you also replace the boot.
Lee
2022 R1250RS White Sport Iowa, USA |
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I should not have to, but now that you mention it, I wonder....
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I could use some input from those who have BMW shaft drive bike (or have worked on them). What causes the marring in the following pictures? Is it normal? Can it be “cleaned up?” Normally I’d not give it a second thought…presuming this is the result of the bearing failing, BUT I want to be sure it won’t pose an issue going forward AND it wasn’t the cause of the failure in the first place.
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Well, I was fortunate today. I bought my DR field mower from Bluff City Cycles. Looking for motorcycle shops in my area, this came up. Got my parts in, so I brought the bearings and the drive assembly in to see what he thought. He didn't have that many more tools than I had, but he was much more familiar with driving these out and installing new ones.
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