K1200 R brake problem - K-Bikes.com - Excellence in Motion
 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old Apr 28th, 2017, 2:04 pm Thread Starter
Noob
 
Join Date: Nov 2016
Posts: 5
K1200 R brake problem

Can anyone help me out with an idea of what is wrong with my K1200R please?

Recently the front brakes hold on for a few seconds once they have been applied. Once this happens the brake lever becomes very hard and not very efficient and the rear brake is almost non existant. If I turn the bike off, then turn the ignition on and apply the front brake several times, I can hear the ABS working and it continues to wir for a few seconds after releasing the brake lever, then I start the bkie, it clears and both front and back brakes for a while .

I have tried applying whilst stationary and the brakes are holding on for a short while and if I roll the bike back and forth they let off.

I did read that the battery can sometimes affect the ABS, so I have fitted a brand new one. Still the same.

I have checked the pads and it's all cleaned in there and free to move.

It did have a new ABS unit 2 years ago so one would think its not an issue.

Any ideas please guys????

Westy
Westy is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old May 18th, 2017, 2:17 pm
Noob
 
Join Date: Mar 2017
Posts: 23
All I can think of is the ABS unit thinks the wheels are slipping so I'd check the sensors. With out the bike running the brakes should hold when applied.
ChetV is offline  
post #3 of 7 (permalink) Old May 25th, 2017, 10:10 am
Member
 
Patrique83's Avatar
 
Join Date: Apr 2017
Posts: 82
Garage
I assume you are talking about the Servo Assisted Brakes.

The 2 vital components that need to be working properly for the Servo to function are the microswitches at the handlebar and at the footpedal.

The Servo will pressurize the brake system when you turn the key.
(Thats the short whining noise when you first turn the key)

To check the microswitches, you can just look at the brake light.
The M-Switches (foot/hand) are connected to the ZFE.
The brake signal goes 2 ways from the ZFE unit. 1.Brake light 2.ABS (Via CAN Signal)

The ABS module has 2 pumps. One for the front and one for the rear circuit.
The front and rear brakes are linked, so pulling the front automatically applys the rear too.
The foot pedal only actuates the rear.

The foot pedal microswitch should illuminate the brake light and the ABS should be whining......(do it by hand, just passed the click)

Is your foot pedal hard the first time after turning the key?
And then gets softer and softer after each try?
Is there any whining noise when pressing the pedal?


If the foot pedal goes soft and there is no whining noise then your microswitch has failed.
Patrique83 is offline  
Sponsored Links
Advertisement
 
post #4 of 7 (permalink) Old May 25th, 2017, 10:12 am
Member
 
Patrique83's Avatar
 
Join Date: Apr 2017
Posts: 82
Garage
I should look at the post date first, before writing a book here....
Patrique83 is offline  
post #5 of 7 (permalink) Old Jan 6th, 2018, 12:20 pm
Noob
 
Join Date: Apr 2017
Posts: 17
Quote:
Originally Posted by Patrique83 View Post
I should look at the post date first, before writing a book here....
No no, this is good! It's gets saved in history for future reference. Thank you for that wonderful information. Me personally I have a K1200R Sport, 2007. I feel my Foot brake to be rather loose (As in I have to sink it in deep to start feeling resistance feedback). I have no warning lights or anything and I can operate the rear brake. Since I haven't driven another K12R Sport I don't have means to compare but can't help but feel that something may be off.

In red lights if I pump the pedal, eventually pressure rises and resistance goes up to the point that I don't have to sink it in so low, but the effects are only temporary. Is this considered normal operation? Thanks for the input!
RattleBattle is offline  
post #6 of 7 (permalink) Old Jan 6th, 2018, 12:42 pm
Noob
 
Join Date: Mar 2017
Posts: 23
Since your bike has only a couple thousand miles and is over 10 years old I would guess the brake fluid has not been changed. That is is good thing to do, the things you are describing are not occuring with my bike. There was also a sponge added to the front brake reservoir to stop foaming so you should see that when you bleed the brakes.
ChetV is offline  
post #7 of 7 (permalink) Old Jan 6th, 2018, 1:31 pm
Noob
 
Join Date: Apr 2017
Posts: 17
Quote:
Originally Posted by ChetV View Post
Since your bike has only a couple thousand miles and is over 10 years old I would guess the brake fluid has not been changed. That is is good thing to do, the things you are describing are not occuring with my bike. There was also a sponge added to the front brake reservoir to stop foaming so you should see that when you bleed the brakes.
Awesome!~ Thanks for the feed back!
RattleBattle is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the K-Bikes.com - Excellence in Motion forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Brake Light Failure Samsonlp K12/1300R/R-Sport 0 Oct 20th, 2015 2:53 pm
Rear Brake Fix mjptexas K12/1300R/R-Sport 7 Sep 22nd, 2009 1:57 pm
Servo Brake Problem dzacco K1200RS/GT (Classic) 6 Jul 7th, 2009 11:59 am
84 K100 Rear Brake problem 9533Zero Other K-Bikes Discussion 6 Feb 9th, 2009 2:01 pm
Rear brake spring problem - possible future recall? Kevan K12/1300S 0 Jul 12th, 2006 11:08 am

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome