• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Rear brake line

  • Thread starter Thread starter Acooljt
  • Start date Start date
A

Acooljt

Guest
OK, some of you may remember my topic a while back about my rear brake rubbing, BADLY. If I put the bike on the stand and spun it, I wouldn't even get a 1/4 of a turn. Well you guys said that a rear brake "return" line is probably blocked. Well where exactly is this line? Cause I don't think it exists. The only lines I see are from the master cylinder to the pump(or whatever you wanna call it) and another line from there to the caliper. What exactly is it that I'm suppose to clean?
 
Sounds like your rear caliper isn't releasing. It could be clogged or your master cylinder could be clogged. Have you bled the rear brake ? If not, try that first.
If that doesn't work, you'll have to clean & rebuild the M/C & caliper. While you're at it take a good look at your rear brake line. If it's original, It's time to replace it.

Terry
 
Alright, so I just drained the entire rear brake system, mastery cylinder and all. I pumped the brakes with all of the lines disconnected and then pumped them with the lines connected but with the bleed screws open to get out all brake fluid.

Then, IT'S STILL RUBBING!!! Yeah, there can be no pressure since all the brake fluid is gone! So I pull the caliper off, and voila! The rubbing sound is gone! When I spin it, it gives me about a half turn(180 degrees). Is that about right?

So then I put the caliper back on but without the pads in this time and it rubs no more. So I look down and the right piston is much closer to the rotor than the left piston is. Oh yeah, and the pad that was on the right side was wore down to the metal.

So I'm wondering if that right piston is frozen? Is there a fix for this or do I need a new caliper? Or have I totally diagnosed this wrong and it's something else?
 
I've never repaired the bikes caliper, but usually you can get the bore honed at a shop and then replace the piston with a new one.
 
I would get a new set of seals for the caliper and rebuild it.
 
The odd thing is, the kid that sold it to me said he rebuilt the rear caliper. Now I'm aware he could have been deceiving me, but why would you point something like that out if you know the thing is faulty?

Also, my rotor is groovy-city but have you seen the price for a new one!?! My ass will hurt for weeks.
 
dont buy a new rotor just go on ebay and find one way cheaper.
 
Acooljt said:
Does my diagnosis sound correct to you guys?
Click to expand...

Like Jethro said, time for a rebuild. I just finished mine...but tell us what bike/year you're working on?

My pistons were frozen but I was able to blow them out with compressed air. Clean the piston with a soft scrunge in one direction only around the piston. Inside the caliper I went to a 0000 steel wool, again only in 1 direction, around the surface. Keep everything very clean. I rinsed my calipers in water before blowing them out and drying with a lint free cloth.

I'm seeing rebuild kits on ebay all the time so pick some up. Remember, just because the PO rebuilt the caliper doesn't mean he did a good job. Take your time, lay out a super clean environment and replace all gaskets, boots, o-rings and seals. It's not the cheapest thing to do but it's not hard either and brakes are no place to skimp. Also, pick up special brake grease at the counter of your local autoparts store for $1.

Keep at it, ask questions here.
 
Somebody who knows better should be able to tell you, but you could get the rotor turned to smooth it out, but then I would worry about the service thickness
 
First of all, it's a 79 GS850.

Yeah, I also thought about turning the rotor but wasn't sure if that was an option or what, no one mentioned it.

Also, I have not tried to push it back in with my finger.
 
You must log in or register to reply here.
Back
Top