BMW K bikes (Bricks)

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tomfoerstel

tomfoerstel
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New member
I just finished replacing the brake lines, then bleeding the system, and noticed there is fluid leaking along the bottom of the reservoir where it sits on top of the master cylinder body on the right handle. Looking at a diagram online it looks like it could be this little o-ring between the reservoir and the master cylinder body. It appears the smaller screw which holds the cover down, and another screw from underneath are what are holding the reservoir onto the master cylinder. Once I drain the fluid out of the reservoir it looks like a pretty simple repair to replace the o-ring, but I have been wrong before :-)

Any suggestions or advice?

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RicK G

RicK G
admin
admin
Yeah thats about it. they can be a bit obstinate because the dried out fluid gets sticky and as  some are getting a bit old be careful not to crush it but you can still get new ones so all would not be lost.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

RT

RT
Life time member
Life time member
Try and get an OEM O ring. I had all sorts of trouble using what I thought was the same size, but there must ve been a tiny difference in the thickness of the ring as it kept up a weeping seep till I bit the bullet and got a new one. I now don't touch it unless I really really have to. Beware the master cylinders get brittle with age so treat it gently when removing/replacing the O ring.
Good luck
RT


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2011 R1200RT
    

Comberjohn

Comberjohn
Life time member
Life time member
Happened to me.
Simple fix. Use a syringe to empty the reservoir. Easily removed and an original O ring cost £1.10, about $1.50.


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Life is not a rehearsal.
2010 VFR 1200F DCT 
2010 R1200GS(gone)
1986 K100 Silver(gone)
2012 K1600GT(gone)
1984 K100RT Madison Silver(gone)
1989 K100LT Stratus Grey(gone)
1984 K100 Red(gone)
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tomfoerstel

tomfoerstel
New member
New member
Everyone, thanks for the advice and comments. I will let you know how it turns out later this week when I get the part and get it installed.

http://www.foerstel.com
    

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