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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: vytasas on May 11, 2017, 02:10:05 PM

Title: final drive shaft inspection
Post by: vytasas on May 11, 2017, 02:10:05 PM
Hi fellas,


Some wear and tear after 70,000 miles, but look okay to me?
Title: Re: final drive shaft inspection
Post by: Laitch on May 11, 2017, 02:36:25 PM
The driveshaft spline you show is starting to get sawtoothed but still has several thousand miles left on it.
The photo of the rear drive spline does not show condition well enough. Take another photo directly in front of it and just slightly above it with good lighting. Right now it looks excessively worn but that appearance might be an effect of the photo's angle.
Title: Re: final drive shaft inspection
Post by: K1300S on May 11, 2017, 06:58:39 PM
That driveshaft is trashed.  FD is in same condition.
Title: Re: final drive shaft inspection
Post by: jakgieger on May 11, 2017, 08:47:03 PM
Quote from: mlytle on May 11, 2017, 06:58:39 PM
That driveshaft is trashed.  FD is in same condition.
A little harsh :bmwsmile , but most likely the case.  The miles did not do this..lack of grease did.  Option 1, drive it until it shells out (Laitch most likely is right).  Option 2, spend a lot of money (there are other splines on the bike, when the rear looks that bad, the others are worn most likely).  Option 3, create a donor bike...Good luck
Title: Re: final drive shaft inspection
Post by: BrickMW on May 11, 2017, 09:04:02 PM
Should be more like this.(https://uploads.tapatalk-cdn.com/20170512/2698457e26dab8035c48d4b151455e60.jpg)

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Title: Re: final drive shaft inspection
Post by: vytasas on May 11, 2017, 11:26:37 PM
i will post photos today after thoriugh cleaning, the final drive might not be so trashed after all :)
Title: Re: final drive shaft inspection
Post by: TX brick on May 12, 2017, 06:10:59 AM
The driveshaft on my 91 was a little worse than that at 30,000 miles. I started lubing it at every tire change and got another 30,000 miles before it was worn to the point of near failure.
Title: Re: final drive shaft inspection
Post by: Laitch on May 12, 2017, 09:04:13 AM
Quote from: TX brick on May 12, 2017, 06:10:59 AM
The driveshaft on my 91 was a little worse than that at 30,000 miles. I started lubing it at every tire change and got another 30,000 miles before it was worn to the point of near failure.
Now that right there is confidence! :2thumbup:
Title: Re: final drive shaft inspection
Post by: TX brick on May 12, 2017, 09:25:42 AM
Quote from: Laitch on May 12, 2017, 09:04:13 AM
Now that right there is confidence! :2thumbup:


I wasn't all that confident. I carried a spare driveshaft on trips.
Title: Re: final drive shaft inspection
Post by: vytasas on May 12, 2017, 09:28:21 AM
at least now i have an estimate  :deal:
Title: Re: final drive shaft inspection
Post by: Laitch on May 12, 2017, 12:25:44 PM
Quote from: TX brick on May 12, 2017, 09:25:42 AM
I wasn't all that confident. I carried a spare driveshaft on trips.
The spare would allow for even more confidence. Let's not look behind the curtain, Tx.
Title: Re: final drive shaft inspection
Post by: vytasas on May 12, 2017, 03:04:31 PM
doesnt look so bad after all
Title: Re: final drive shaft inspection
Post by: Elipten on May 12, 2017, 04:42:24 PM
Looks okay from that angle


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Title: Re: final drive shaft inspection
Post by: Laitch on May 12, 2017, 06:30:28 PM
Quote from: vytasas on May 12, 2017, 03:04:31 PM
doesnt look so bad after all
From what I see there, I wouldn't be worried if that were on my bike. Invest in a new driveshaft when you have enough euros.