BMW K bikes (Bricks)

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Bonzo

Bonzo
Life time member
Life time member
Is there any special equipment needed regarding the ABS?

I've bought some Venhill braided lines from Motobins with the plan to get them fitted by a local mechanic (I wouldn't trust myself with the job). He said he cant do it properly as he cant bleed the ABS without the special 'plug' that the old dealers used on these models. He reckons he wouldn't be able to get all the air out.


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Can you operate 11, 13, and 14mm spanners? Yes? then go ahead and change the lines yourself. The hardest part of the job is making sure not to get the DOT 4 on the paint work. (I keep a spray bottle of water and a towel close at hand to administer first aid when, not if, I spill some brake fluid.)

Bleeding is a test of your right/left hand coordination. If you can slowly slap a table top with alternating hands you are well qualified for the job of bleeding the system.

The job shouldn't take more than 2 hours at worst. Take the money you save by doing it yourself and buy fuel for the bike and a couple pints to celebrate.


__________________________________________________
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
    

mike d

avatar
Life time member
Life time member
As mentioned, no need for any special kit to bleed the brakes. maybe the delaer was thinking about the iABS setup as fitted to the R1150 and K series post 2001. They do need to have the module exercised.

Bleed the modules first then the wheel calipers.

Mike

    

Bonzo

Bonzo
Life time member
Life time member
You guys have more confidence in my abilities than I do for sure. I struggle bleeding the brakes on my mountain bike  Embarassed

Even the Clymer manual tells me not to touch it and hand it over to an expensive BMW technician  scratch


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

Point-Seven-five

Point-Seven-five
Life time member
Life time member
I suspect the Clymer advice has been edited by their liability legal team.

On the ABS1 bikes the bleeding is straightforward, the only difference being that there are two extra bleeders on the ABS modulators that need to be addressed.

Open, squeeze, close, release. A 6mm hose guides the old fluid to a half full 4 liter jug of water. The water dilutes the old fluid so it isn't as corrosive and, more importantly, makes it more stable so it doesn't tip over and spill the fluid al over the place.


__________________________________________________
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
    

Bonzo

Bonzo
Life time member
Life time member
Thanks for the wisdom & encouragement guys.

I'm gonna give it a go  Replacing Brake Lines (on ABS Model)? 112350


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

Bonzo

Bonzo
Life time member
Life time member
By the way, do you guys use a hand vacuum pump to pull the old fluid through?


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

RicK G

RicK G
admin
admin
I do use a vacuum bleeder but they are easy to do without one.


__________________________________________________
"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
    

MartinW

MartinW
Life time member
Life time member
You need a Nescafe bleeder.
Regards Martin.
Replacing Brake Lines (on ABS Model)? Brake_11


__________________________________________________
K75s Hybrid
    

caveman

caveman
Gold member
Gold member
May I suggest before taking the lines off, bleed some fluid through to make sure your master cylinders are working properly and the small rear hole is open (returning freely to allow make up fluid). If the cylinders have not been bled in a while they may stick in the bore when going full stroke so go 1/2, 3/4 and work your way up to full stroke. Good luck!

    

Point-Seven-five

Point-Seven-five
Life time member
Life time member
I used a vacuum bleeder, but found that it sucked air in around the threads of the bleeder fitting. This is no big deal, but the bubbles that were constantly coming through the hose made me question if I had bled all the air out. Now I just use the tried and true old school method of open. squeeze, close, release.


__________________________________________________
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
    

Bonzo

Bonzo
Life time member
Life time member
@MartinW wrote:You need a Nescafe bleeder.
Regards Martin.
Replacing Brake Lines (on ABS Model)? Brake_11

Darn it! I just bought two jars of Carte Noire  Shocked


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

RicK G

RicK G
admin
admin
I use the earlier Vegemite model.


__________________________________________________
"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
    

Dai

Dai
Life time member
Life time member
So waht's wrong with the Marmite version?


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

TacKler

TacKler
Life time member
Life time member
I use the chutney version.  

If it's made in Ind*a .... oh, sh*t.  No wonder it takes so long.


__________________________________________________
Red 1991 K75S
    

Bonzo

Bonzo
Life time member
Life time member
Well, much to my surprise this actually went ok until.... ah we'll get to that.

Did the rear first figuring it would be easier as everything is in close proximity and all went well.

Started on the front. The upper was a bit of a pain as the MC to steel mod pipe is buried under wiring under the tank, but we got there with a bit of cursing.

The downside is the front lowers (2 x splitter to calipers) in the Venhill 'kit' from Motobins come with male - banjo, whereas my originals are banjo to banjos. I thought I'd get away with it, but the new lines are just a tad too short (without putting a 90 degree kink in the line).

I'm gonna have to get in touch with Motobins, but its a bit of a pain as I wanted to sort it this bank holiday weekend.

Replacing Brake Lines (on ABS Model)? Img_2026
Replacing Brake Lines (on ABS Model)? Img_2027
Replacing Brake Lines (on ABS Model)? Img_2028


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

Bonzo

Bonzo
Life time member
Life time member
on the plus side, it did mean I got to watch one of the best MotoGP races in ages  cheers

Here's the line that doesn't quite fit.. (assuming I have the original splitter??) 

Replacing Brake Lines (on ABS Model)? Img_2029
Replacing Brake Lines (on ABS Model)? Img_2030
Replacing Brake Lines (on ABS Model)? Img_2029


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

gorio

gorio
Silver member
Silver member
Maybe a silly question but what happens if you try the banjo end up at the splitter?


__________________________________________________
1992 K100rs 16v
1997 R1100rt
2006 R1200rt
Past lives
Kawasaki Concours
1976 BMW R90s
1975 Ducati 860gt
1992 Honda VFR750
1985 Honda VF750
1982 Kawasaki 750GPZ
1975 Norton 850 Commando
    

Bonzo

Bonzo
Life time member
Life time member
@gorio wrote:Maybe a silly question but what happens if you try the banjo end up at the splitter?

Not a silly question at all gorio, alas the angle is too tight, the length too short and if the male union went into the caliper it would be a wheel out job to give enough clearance.

*EDIT* Sorry, I mean caliper off job rather than wheel out.  Embarassed



Last edited by Bonzo on Sun May 02, 2021 3:18 pm; edited 1 time in total


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

Dai

Dai
Life time member
Life time member
I think you'll find that the male end does have to go in the caliper. Just take the caliper off the fork leg and wind the hose in, then tweak it up with the caliper back on the bike.


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

Bonzo

Bonzo
Life time member
Life time member
I'll try it Dai, but I think its too tight, as in a kink in the line to get the banjo in at the splitter.

I'll report back tomorrow  Replacing Brake Lines (on ABS Model)? 112350


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

Bonzo

Bonzo
Life time member
Life time member
Yeah, the male straight out of the caliper is on the rim.


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

gorio

gorio
Silver member
Silver member
@Bonzo wrote:Yeah, the male straight out of the caliper is on the rim.
Just checked the three bikes here and they are all banjo at the caliper. Was worth a try!

In looking at the photos the crimp part connecting the fitting to the tubing part seem longer then the old one so that could make the difference. That is me assuming most the length of the black heat shrink is over what is ridged? It is such a short line there isn't much wiggle room on it.

I am sure Motobins will sort it out as they likely sell hundreds of those a year.


__________________________________________________
1992 K100rs 16v
1997 R1100rt
2006 R1200rt
Past lives
Kawasaki Concours
1976 BMW R90s
1975 Ducati 860gt
1992 Honda VFR750
1985 Honda VF750
1982 Kawasaki 750GPZ
1975 Norton 850 Commando
    

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