BMW K bikes (Bricks)


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1Back to top Go down   Chicom rear brake master cylinder Empty Chicom rear brake master cylinder Fri Nov 01, 2019 11:00 pm

brickrider2

brickrider2
Life time member
Life time member
Is this the piece that is pretty much a plug 'n' play replacement for the rear brake system on a K1100LT?
https://www.ebay.com/itm/Motorcycle-Rear-Hydraulic-Foot-Brake-Master-Cylinder-Reservoir-Dirt-Bike-Pit-ATV/312810734373


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1996 K1100LT
    

2Back to top Go down   Chicom rear brake master cylinder Empty Re: Chicom rear brake master cylinder Fri Nov 01, 2019 11:54 pm

MartinW

MartinW
Life time member
Life time member
I used the one with the elongated mounting holes. See here for how to do it there are a couple of ways. Some people have used their OEM hose, some have used an adaptor I fitted a new hose. http://www.motobrick.com/index.php/topic,9364.msg115727.html#msg115727
Regards Martin.


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1992 K75s
    

Point-Seven-five

Point-Seven-five
Life time member
Life time member
That looks like the correct type of master cylinder.  The thing you want to check is that the distance between the mounting holes is the same as the OEM unit.  I seem to recall that the distance is 54mm and the master cylinders with elongated holes as Martin has mentioned have the correct spacing.  Best to measure yours.

The good news is that if your brakes are stock, the line will have a banjo fitting that will work without modifications or adaptors.  Early model K bikes had the line screw into the master cylinder, and the Chicom threads didn't match those on the end of the brake line.

You want to replace the line from the reservoir with one that is rated for brake fluid.  There is a report that someone has had this line fail because the fluid ate it.

Outside of the reservoir hose, the only thing you need to do is modify the push rod.  On the three I've done, I ran the nut down until it pressed against the rubber boot.  I cut the pushrod at that point, and then countersunk the end of the rod with a 3/8" drill bit.  The combination of the countersink and the nut forms a pocket to contain the ball end of the pedal's pushrod.


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Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

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