BMW K bikes (Bricks)

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1Back to top Go down   Rear brake hose routing options? Empty Rear brake hose routing options? on Wed Feb 05, 2020 12:39 pm

schrocketeer

schrocketeer
active member
active member
For a 1985 K100RT, the flexible brake line coming out of the rear master cylinder has a new part replacement that is 95mm (3.74 inches) longer than the original. Would you please help me with routing options?

Original part number:34 32 1 450 555    BRAKE HOSE - L=275MM (to 12/91)
Replacement part number:34 32 2 310 962    BRAKE HOSE - L=370MM (from 12/91)
This is from Max's page: http://shop.maxbmw.com/fiche/DiagramsMain.aspx?vid=51754&rnd=07242017

As I was rebuilding the rear master cylinder, I thought I had the wrong part number, since the replacement was so much longer than the original. My old one wasn't leaking. I just thought it would be smart to replace a 34 year old brake line. :-o

I'm concerned about ground clearance for this extra length.
Rear brake hose routing options? Modify_inline


__________________________________________________
Ken
 
85 K100RT
91 XR250
97 XR100
70 CT70
06 YFM400
 
Past Bikes:
95 VLX600
86 TRX250
02 GZ250
83 Z50R
78 ATC90
86 XR250
79 XR500
72 AT1
75 YZ360
78 DT400
75 DT125
73 Trail 70
 
Dad's bikes I rode in high school
69 CL175K3 Scrambler
71 R5-B (RD350 predecessor)
    

2Back to top Go down   Rear brake hose routing options? Empty Re: Rear brake hose routing options? on Wed Feb 05, 2020 2:32 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Not having an '85 K100RT to look at, I wonder if the longer hose replaces the two piece line of the pre12/91 configuration.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
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
    

3Back to top Go down   Rear brake hose routing options? Empty Re: Rear brake hose routing options? on Wed Feb 05, 2020 2:39 pm

schrocketeer

schrocketeer
active member
active member
It still has a two piece assembly: front piece flexible hose, back piece metal tube.


__________________________________________________
Ken
 
85 K100RT
91 XR250
97 XR100
70 CT70
06 YFM400
 
Past Bikes:
95 VLX600
86 TRX250
02 GZ250
83 Z50R
78 ATC90
86 XR250
79 XR500
72 AT1
75 YZ360
78 DT400
75 DT125
73 Trail 70
 
Dad's bikes I rode in high school
69 CL175K3 Scrambler
71 R5-B (RD350 predecessor)
    

4Back to top Go down   Rear brake hose routing options? Empty Re: Rear brake hose routing options? on Wed Feb 05, 2020 4:33 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Maybe you're supposed to replace both parts of the old brake line with the new hose.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
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
    

5Back to top Go down   Rear brake hose routing options? Empty Re: Rear brake hose routing options? on Wed Feb 05, 2020 7:12 pm

Mick67

Mick67
Silver member
Silver member
For what its worth, when I replaced mine (84RS), the new hose in kit went straight into the caliper and removed the metal pipe as well.

Cheers Mick


__________________________________________________
K100RS 1984
VIN 0013414
    

6Back to top Go down   Rear brake hose routing options? Empty Re: Rear brake hose routing options? on Wed Feb 05, 2020 8:02 pm

duck

duck
Life time member
Life time member
@Mick67 wrote:For what its worth, when I replaced mine (84RS), the new hose in kit went straight into the caliper and removed the metal pipe as well.

Cheers Mick

What about the grommet that goes around the metal/rubber hose connector and fits into the swing arm?

Rear brake hose routing options? 2F9cCBI


__________________________________________________
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
    

7Back to top Go down   Rear brake hose routing options? Empty Re: Rear brake hose routing options? on Wed Feb 05, 2020 8:53 pm

Mick67

Mick67
Silver member
Silver member
Ran the brake line through the grommet. Looks like about 10cm extra length on line with pipe removed..

Rear brake hose routing options? 20200210
Rear brake hose routing options? 20200211

I know I need a new grommet.


__________________________________________________
K100RS 1984
VIN 0013414
    

8Back to top Go down   Rear brake hose routing options? Empty Re: Rear brake hose routing options? on Wed Feb 05, 2020 9:34 pm

duck

duck
Life time member
Life time member
Interesting. Thanks for the pics.


__________________________________________________
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
    

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