spongey rear brake - BMW Luxury Touring Community
LinkBack Thread Tools Display Modes
post #1 of 5 Old Sep 12th, 2013, 7:53 am Thread Starter
Join Date: May 2007
Location: kelso, roxburghshire, scotland
Posts: 63
spongey rear brake

My 2000 my LT has developed a rear break problem. Over the last couple of rides the rear brake has gone spongey. I have checked the reservoir , its over half full. checked for leaks , non to be found . There are no leaks on the master cylinder, the pistons on the caliper were checked and were free approx. 1500 miles ago and pads replaced. Does anyone have any idea what to check next. If I pump the brake and keep it under pressure overnight the brakes feel normal for a few rides.
Any help would be greatly appreciated
Thanks in advance
hovis is offline  
Sponsored Links
post #2 of 5 Old Sep 12th, 2013, 8:35 am
Senior Member
dvgb131's Avatar
Join Date: Jul 2013
Location: Guilderland, NY, USA
Posts: 207
Re: spongey rear brake

Well, I gotta believe a caliper is a caliper. I just had these exact same symptoms with my Honda Ridgeline. Turns out the slider pins were locked up. Freed, cleaned and greased and spongy brake feeling is gone!
Easy to check.

Doug B.
2000 LT purchased July 2013
dvgb131 is offline  
post #3 of 5 Old Sep 12th, 2013, 11:22 am
Senior Member
GaryEm's Avatar
Join Date: Aug 2012
Location: Hudsonville, Mi., USA
Posts: 844
Re: spongey rear brake

Did you ever replace the brake lines ;sometimes that can do strange things because they will look good on the outside but will collapse in the inside.

2003 K1200LT
GaryEm is offline  
post #4 of 5 Old Sep 12th, 2013, 11:44 am
Senior Member
Join Date: May 2011
Location: Oshawa, Ontario, Canada
Posts: 978
Re: spongey rear brake

sounds like air but if the piston in the master cylinder not moving freely so that it does not return completely you can get the same feeling, stoke is reduced, need to get new master they do not sell parts for it

2018 R1200RT
Past rides
2012 K1600GTL
2000 K1200LT
1992 K1100LT
2000 V Star 650/Velorex sidecar
1985 K100RT
1965 R60/2
1960 AJS 500 single
gary45 is offline  
post #5 of 5 Old Sep 12th, 2013, 12:51 pm
Wrencher Extraordinaire
jzeiler's Avatar
Join Date: May 2004
Location: Hazel Green, AL, USA
Posts: 13,269
Re: spongey rear brake

Caliper is a hard mount on the LT the floating is done at the rotor so no slide pins. My bet is on 14 year old brake lines that are about to pop. Seriously the LT at that age is ready for a brake line failure. But check to make shure there is some free play in the foot pedal to push rod into the MC. That can cause a problem if there is none.

2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
jzeiler is offline  

Quick Reply

Register Now

In order to be able to post messages on the BMW Luxury Touring Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

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


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

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
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 Question jimdeluca RT Series 12 Jan 14th, 2013 11:22 pm
Rear Brake stopped working. NCCCC1 K1200LT 26 Oct 7th, 2012 10:19 pm
Lowering the rear brake pedal lemiller K1200LT 14 May 20th, 2012 11:34 am
Rear Brake Reservoir Hollywood K1200LT 10 Oct 20th, 2009 1:49 pm
Drilled rear brake rotor???? DRothermel K1200LT 10 Apr 7th, 2006 2:01 pm

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