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Old 11-28-2003, 03:23 PM   #1
storymitchell OP
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Driveshaft oil for airhead?

How much oil is supposed to be in an R60/6 driveshaft? In prep for a ride tomorrow I wanted to top off the gearbox, final drive, and driveshaft. The gearbox and final drive were easy, but the directions for the driveshaft said to pull the filler plug, shove a screwdriver straight down, and add oil until 2 mm of oil showed on the end of the screwdriver. I added a fair amount of gear oil, and finally got a bit showing on the end of the screwdriver. I don't have a warm fuzzy about this though. Is there supposed to be oil in the driveshaft? Does what I said here sound right?

Help!
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Old 11-29-2003, 07:47 AM   #2
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I think the amt is 150cc.

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Old 12-17-2003, 03:32 PM   #3
jimmyjam
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100cc is fine.

The BMW guideline will have you overfilling the driveshaft by quite a bit.

It's better to have that oil under rather than over filled-check this link for more info.

http://w6rec.com/duane/bmw/oil.htm
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Old 06-03-2008, 08:48 PM   #4
wirewrkr
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BMW says 150cc, so I figger you can't go wrong with that.
Why would less be better?
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Old 06-04-2008, 11:15 AM   #5
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I've been measuring 150 as well, but what occurs with more than the right amount, as read on that webpage 100-150 cc's but to err towards 100cc... What would happen if say 200 cc's were utilized, I am certain it would not over flow, would it just force its way into the rear drive?
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Old 06-04-2008, 11:33 AM   #6
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The failure mode (for losing oil) is typically at the other end of the driveshaft. I always ran 150cc in my R100RT (BTW, the screwdriver dipstick at 1 to 2 mm is usually pretty close) but I discovered the my transmission was often over full. It took me a while to discover that my driveshaft oil was always low. The oil was migrating from the driveshaft into the transmission. I was gonna fix it but never did. Every coupla thousand miles I'd make adjustments. The reason for that driveshaft oil is to keep the splines lubed where the driveshaft joins the final drive. I don't suspect that running 100cc or even less would create a problem.
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Old 06-04-2008, 12:01 PM   #7
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Quote:
Originally Posted by charliemik
...The reason for that driveshaft oil is to keep the splines lubed where the driveshaft joins the final drive...
It also lubes the universal joint at the other end.
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Old 06-04-2008, 02:30 PM   #8
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It seems that BMW issued some technical bulletin at some point reducing the 150cc to 120cc??? Several "guru" airhead sites mention using 50-100cc so the migration is lessened or eliminated. The smaller quantities are not known to hurt anything except in airhead GS driveshafts. I know that if I put 150 in the driveshaft of my bike I drain about 50cc 300 miles later out of the transmission so I learned to put 90-100cc in the driveshaft and it stays there.
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Old 06-05-2008, 09:31 AM   #9
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Quote:
Originally Posted by kixtand
It also lubes the universal joint at the other end.
I'm no expert and it has been a while since I've had my swing arm opened up but, my recollection is that the needle bearings in the u-joint are sealed. Hence, no grease gets out and no oil gets in. Am I wrong?
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Old 06-05-2008, 10:12 AM   #10
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Quote:
Originally Posted by charliemik
I'm no expert and it has been a while since I've had my swing arm opened up but, my recollection is that the needle bearings in the u-joint are sealed. Hence, no grease gets out and no oil gets in. Am I wrong?
I can't say for sure on all models, but my recollection is that if it has oil in the swingarm then the u-joint is not sealed.
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Old 08-31-2014, 04:08 PM   #11
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Sorry for digging up an old one but...

While waiting for parts I am changing all fluids in a new to me 78 R100/7 34.5k miles. All looked good on the trans and final drive (Caught the speedo cap just in time I think.) but when I went to do the drive shaft it was dry as a desert bone. I did as I usually do and squirted in a little oil to flush crap with the drain off. Nothing came out even after changing the angle of the drive shaft. Not knowing exectly how much I had put in to flush it I added about 100cc and left it at that.

Should I have any reason for concern?

Final oil looked near new, trans had some water but neither had shavings on the magnets.
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Old 09-04-2014, 12:25 PM   #12
Big Bamboo
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Quote:
Originally Posted by kixtand View Post
I can't say for sure on all models, but my recollection is that if it has oil in the swingarm then the u-joint is not sealed.
Not true. The u-joint is the same in all models, twin shock to Para-lever. They don't need oil to work, they were greased before assembly...
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Old 09-04-2014, 12:28 PM   #13
Big Bamboo
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Quote:
Originally Posted by wiggledbits View Post
While waiting for parts I am changing all fluids in a new to me 78 R100/7 34.5k miles. All looked good on the trans and final drive (Caught the speedo cap just in time I think.) but when I went to do the drive shaft it was dry as a desert bone. I did as I usually do and squirted in a little oil to flush crap with the drain off. Nothing came out even after changing the angle of the drive shaft. Not knowing exectly how much I had put in to flush it I added about 100cc and left it at that.

Should I have any reason for concern?

Final oil looked near new, trans had some water but neither had shavings on the magnets.
I would run it until warm and then drain and add the correct amount. Pouring oil through it won't "flush crap" out. 1/2 cup is sufficient for the LWB models...
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