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Author Topic: K75S leaking rear master cylinder  (Read 5032 times)

Offline motorheadsdiygarage

  • Knowledge is Power
  • Motobrick Curious
  • Posts: 42
K75S leaking rear master cylinder
« on: August 16, 2016, 08:01:22 PM »
Spent my day working on the K75S leaking rear master cylinder to no avail. Still leaking so I ordered the rebuild kit since the bore was not scored or pitted.

Followed the Drake Smith tutorial.

HERE
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  • Near Montreal Canada
  • 1992 BMW K75S

Offline blakey

  • Motobrick Curious
  • Posts: 37
  • Learn to listen, listen to learn.
Re: K75S leaking rear master cylinder
« Reply #1 on: August 16, 2016, 08:11:04 PM »
Dumb question No.438...

What's the purpose of the hex head bolt with the Allen key hanging out of it?

Thanks.
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blakey
K100RS 1986 RED!
North of Bris Vegas, Queensland, Oz.

Offline rbm

  • ^ Quintessential Motobricker
  • Posts: 2308
Re: K75S leaking rear master cylinder
« Reply #2 on: August 16, 2016, 08:20:56 PM »
It's the screw that retains the piston assembly in the master cylinder.  The hex key is to remove / reinstall it.
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  • Regards, Robert
Toronto, Ontario

1987 K75 - Build Blog @http://k75retro.blogspot.ca/

Offline blakey

  • Motobrick Curious
  • Posts: 37
  • Learn to listen, listen to learn.
Re: K75S leaking rear master cylinder
« Reply #3 on: August 17, 2016, 06:54:09 PM »
Thanks Rob. Glad I found out about it now before I tried to fix one!
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blakey
K100RS 1986 RED!
North of Bris Vegas, Queensland, Oz.

Offline motorheadsdiygarage

  • Knowledge is Power
  • Motobrick Curious
  • Posts: 42
Re: K75S leaking rear master cylinder
« Reply #4 on: August 21, 2016, 08:38:53 PM »
New rebuild kit received and installed. No more leaks..... :neener:
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  • Near Montreal Canada
  • 1992 BMW K75S

Offline Laitch

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Re: K75S leaking rear master cylinder
« Reply #5 on: August 21, 2016, 08:45:30 PM »
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles
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