BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down   K100 Rear brake master cylinder Empty K100 Rear brake master cylinder Sat Jan 16, 2016 6:13 am

gunsports

gunsports
Silver member
Silver member
'83 K100 8v non ABS

I think the rear rake master cylinder needs replacement. I have already done the brakes (new shoes), a new rake disk and a master cylinder kit. Brakes still are spongy. Bike stood for many years and there is corrosion in the master cylinder towards the back. Seems the fluid is flowing back under pressure.

I am looking at E-Bay for a replacement.

Are there rear brake cylinder bodies from other BMW years/models that will interchange? Seems the K75 and R series, as well as the newer years, are far less expensive than the early K's.

Any help will be greatly appreciated.

Thanks

Glen

    

2Back to top Go down   K100 Rear brake master cylinder Empty Re: K100 Rear brake master cylinder Sat Jan 16, 2016 7:02 am

Chocolate

Chocolate
Life time member
Life time member
Hey Glen!

There are two sizes 12 and 13 mm, they both fit.
The only new you can get now are 12mm.
I have two K 75, 1991 without ABS = 12mm 
and a other K 75 with ABS = 12mm.

All K 75 100 and 1100 will fit! I think? the R100R and R80R will fit too, but wait until somebody else confirmes.

On REALOEM klick on the rear master cylinder number and you will see which other KS use the same cylinder.
http://www.realoem.com/bmw/enUS/showparts?id=0562-EUR-02-1992-K569-BMW-K_75_85_0562,0571_&diagId=34_0620

Cheers


__________________________________________________
Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
    

3Back to top Go down   K100 Rear brake master cylinder Empty Re: K100 Rear brake master cylinder Sat Jan 16, 2016 11:43 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
I've just replaced the 13mm rear brake master cylinder on my '85 K100, BMW part number 34 31 1 454 351, the same number for your '83 model. There are plenty of them available. I bought it new for less than the US$200 it retails for as I work for a dealer. No other master cylinder from any other Beemer fits the K100/K75 and works as the original does. It has to do with the piston/lever attachment. A clever person could/might be able to fab something up. The 12mm ABS version is also available and will slot into position like the non-ABS master cylinder. There is no separate piston/seal kit available from BMW.


__________________________________________________

1970 R60/5, OZ '77 R75/7-R100, '85 K100'87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-P  - Beemers owned still or sold.

~We all believe what we want to believe in - Rob Dickinson
    

4Back to top Go down   K100 Rear brake master cylinder Empty Re: K100 Rear brake master cylinder Sat Jan 16, 2016 2:16 pm

Inge K.

Inge K.
VIP
VIP
Both Motobins and Motorworks have 13mm cylinders, which is a bit cheaper than 12mm.
Bins have the lowest price.......to post a small item like that to SA would cost only a couple of fingers.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

5Back to top Go down   K100 Rear brake master cylinder Empty Re: K100 Rear brake master cylinder Sat Jan 16, 2016 2:59 pm

gunsports

gunsports
Silver member
Silver member
Jip: After posting, I re measured the master cylinder, and the part that Moto Bins sent me. One is 13mm, the kit is 12mm. They made a mistake and sent me the wrong one. No wonder I've been struggling to get proper brakes. First going to look and see if I cannot scrounge the rubber piston somewhere else. Then I'll probably have to buy a whole kit again. Dammit!

    

View previous topic View next topic Back to top  Message [Page 1 of 1]

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