BMW K bikes (Bricks)

You are not connected. Please login or register

Go to page : Previous  1, 2

View previous topic View next topic Go down  Message [Page 2 of 2]


duck


Life time member
Life time member
Although a banjo bolt would work in the caliper, I did more poking around and finally ordered these parts so that I can have a line that goes straight into the caliper with a banjo bolt at the master.

The SS line has female threaded ends and comes with three banjo fittings. I'll probably use the 90 degree fitting at the master end:

Replacing rear master cylinder with a Chinese one - Page 2 DRsQwF6

At the caliper end I'll use one of these adapters so that the line goes straight into the caliper similar to the OEM setup:

Replacing rear master cylinder with a Chinese one - Page 2 VzFaySo

http://www.ClassicKBikes.com
    

Bricklayer

Bricklayer
active member
active member
Which end of the  goes into the caliper please- AN3 or M10?

https://anthonymrugacz.net/
    

duck

duck
Life time member
Life time member
Bricklayer wrote:Which end of the  goes into the caliper please- AN3 or M10?

The threads in the caliper are M10x1.0.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

Bricklayer

Bricklayer
active member
active member
NOTE: POST UPDATED - SEE PICS BELOW  (date 20220929)

On my 85 K100RS I am going with this automotive hose- banjo w/ 90 degree and female M10 x 1.0 to connect to the brake pipe. Same length as the stock BMW hose.


EBay $13.82 (free shipping)   -   also at Summit Racing for $11.89 but 2 week wait. Next step- hose for the reservoir to master cyl. hose decision...


UPDATE


Seems this hose has an outward flare (as does the brake pipe on my 1985 K100RS).


Options: 1) drill an inward flare   2) Have a new pipe made to match   3) get a flaring tool and attempt to change the flare on the pipe

OPTION 2 WORKED

I just made a new rear caliper pipe. There's no brake shop in my city so I apologize for my moronic efforts online.


Replacing rear master cylinder with a Chinese one - Page 2 Flare-10

Replacing rear master cylinder with a Chinese one - Page 2 Brake-10


Replacing rear master cylinder with a Chinese one - Page 2 S-l50010



Last edited by Bricklayer on Thu Sep 29, 2022 9:02 pm; edited 2 times in total

https://anthonymrugacz.net/
    

duck

duck
Life time member
Life time member
Bricklayer wrote:On my 85 K100RS I am going with this automotive hose- banjo w/ 90 degree and female M10 x 1.0 to connect to the brake pipe. Same length as the stock BMW hose.

Sunsong # 2204760

Good find. That should work with the metal pipe.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

Bricklayer

Bricklayer
active member
active member
Installing my Chicom People's Rear Master brake Cylinder  and had a switch fail. Cleaned many times and just needed retirement, my rear brake switch on the 85 K100RS  has been ripped apart to see it's guts. Probably could re-sleeve or epoxy it back together but a quick search for an M8 x 1.0 brake light switch and voila! US$14 new w/ shipping on Ebay. A quick solder and water proofing should be all needed. Sure I am jumping the gun here as I just ordered it but my confidence is running high. 

New MAGURA Brake Light Switch Normally Closed NC Circuit 285.55 Gray tip M8x1.0


Replacing rear master cylinder with a Chinese one - Page 2 S-l50011



PART ARRIVED - FIT PEFECTLY
Replacing rear master cylinder with a Chinese one - Page 2 2022-012



Last edited by Bricklayer on Thu Sep 29, 2022 9:05 pm; edited 1 time in total

https://anthonymrugacz.net/
    

redrockmania

redrockmania
Silver member
Silver member
Further to posts 54 and 55: In addition to the alternative K100 rear brake line Sunsong Part #: 2204760, other alternatives are Nissan Part #: 46210AL510 or alternatively 46210AL51A, or Dorman #: H620527. It appears they are all replacement for the rear brake line of a Nissan Z350 - hope this helps those interested in this option.

    

Bricklayer

Bricklayer
active member
active member
While awaiting for my new rear brake hose to fit the Chicom master cylinder, I gave a shot at repairing the original BMW rubber boot seal which had a tear in it. After a  cleaning and roughing up with sandpaper I superglue a rubber band made from a bicycle inner tube around it. A brake fluid bottle cap was used to hold it together while it dried. Once dried I dabbed a small amount of silicon sealant on the inside. Primitive but seems sturdy enough.

Replacing rear master cylinder with a Chinese one - Page 2 2022-010

https://anthonymrugacz.net/
    

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Nice work!


__________________________________________________
Present:
1994 K75RT
1991 K100RS


Past:
1988 K100RS SE
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

View previous topic View next topic Back to top  Message [Page 2 of 2]

Go to page : Previous  1, 2

Permissions in this forum:
You cannot reply to topics in this forum