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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: sfrligo on September 03, 2015, 09:57:58 PM

Title: Main Seal Replacement Question
Post by: sfrligo on September 03, 2015, 09:57:58 PM

Hello,

I stripped my 1994 K75 down to the main seal. There doesn't seem to be much coming out of it (see photo) but it might be 20 years old, and I thought I'd replace it while I was in there. There was some gunk in and around the clutch, but nothing coming out the weep hole.

I know the seal sits over some ball bearings. Is there a way to just buy the replacement seal without the bearings? anyone have advice for how to find that? I can find the unit with the bearings for $133, but there's no way the seal alone should cost that.

Thanks!

Title: Re: Main Seal Replacement Question
Post by: Scott_ on September 03, 2015, 10:33:05 PM

Sure you can..

(06)    11 11 7 666 186    SHAFT SEAL - 50X80X10

(http://www.maxbmwmotorcycles.com/fiche/Diagrams/B0000171.png)

Part #6, about $34

Title: Re: Main Seal Replacement Question
Post by: TimTyler on September 04, 2015, 02:09:26 AM

Get the $2 O-ring too. # 11211460456

Title: Re: Main Seal Replacement Question
Post by: Scott_ on September 04, 2015, 07:30:56 AM

Quote from: TimTyler on September 04, 2015, 02:09:26 AM

Get the $2 O-ring too. # 11211460456

That o-ring alone is probably the real cause of the oil leak....................Not uncommon at all.

Title: Re: Main Seal Replacement Question
Post by: stryder on September 04, 2015, 05:11:12 PM

Check the gaps between the bell/mid-housing, and the engine block. You might find some pooling in those "pockets". You do have a leak. (Isn't the inside of the bell/mid housing supposed to be silverish/metalic aluminum? It's black/covered in oil in you pic) It will only get worse.