Rear master cylinder/brakes - 600RR.net
Troubleshooting Having trouble with your bike? Common know issues or trobuleshooting questions here.

 
LinkBack Thread Tools
post #1 of 14 (permalink) Old 09-10-2010, 05:01 PM Thread Starter
Training Wheel Hero
 
Join Date: May 2010
Location: Oceanside
Posts: 26
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Rear master cylinder/brakes

So my vortex rear brake light pressure switch decided to just stay closed and no amount of tapping or bleeding could get it to open. Oh well, bought a new one and installed it. Installation went off without a hitch. Went to bleed the rear brakes and when I got done the lever seems unusually squishy. It still stops the bike and engages the calipers but it just feels like it has a LOT of play. Whilst bleeding the rear brakes I didn't get any air, I even tapped on the master cylinder trying to shake out any bubbles. When I opened the bleed valve while pushing on the lever the fluid just kind of oozed out without much force at all it seems though. Any ideas? do I just need to go ride it around for awhile and use the rear brakes?

Secondly when compressing the rear brake the master cylinder kind of creaks or clicks in certain spots? is this kind of normal or does it sound like something is broken on the inside?
henik0 is offline  
Sponsored Links
Advertisement
 
post #2 of 14 (permalink) Old 09-10-2010, 05:06 PM
Demented
Guest
 
Posts: n/a
The creaking or clicking is probably from the lever itself and not the master cylinder.

Try bleeding the rear brake again. If no air came out when bleeding, there is still some in there somewhere, as it'd be pretty much impossible to not get air in the system when replacing the banjo bolt.
post #3 of 14 (permalink) Old 09-10-2010, 05:22 PM Thread Starter
Training Wheel Hero
 
Join Date: May 2010
Location: Oceanside
Posts: 26
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
you know i just realized i didn't take off the reservoir cover while bleeding. meaning when the MC tried to suck more fluid down from the the reservoir it just created a vacuum and didn't actually suck and fluid in. A vacuum in the system would explain a squishy lever. sound right to anyone else or did i forget to take my pills today?
henik0 is offline  
 
post #4 of 14 (permalink) Old 10-28-2010, 09:11 PM
Knee Dragger
 
AWellman's Avatar
 
Join Date: Apr 2009
Location: Cincinnati
Posts: 180
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
im having i similar problem. i changed my rear tire and when i put the wheel back on all my braking in the rear was gone.. dont know what hppened... i tried bleeding the brakes and refilling the resivors for like 2 hrs... keep trying things and testin em and nothin.

any one got like a step by step to help get my braking back,, after my last bleeding i could get the rear to lock up during my test but it took like a ton and ton of pressure.
=(

Aaron

07 CBR600RR
-ProGrip red reflective rim tape
-Two Brothers CF Slip On
-Tripage FE (hugger)
-08 red lowers
-Satin Black mids
-Power coated
-subframe- matte black
-rearsets- matte black
-pegs- red
-hand levers- matte black
-Puig DB dark Smoke
-(more to come)


Two Brothers Sound-
http://www.youtube.com/watch?v=OSof-a5yIXY
AWellman is offline  
post #5 of 14 (permalink) Old 10-28-2010, 10:00 PM
Administrator
 
Nico's Avatar
 
Join Date: Apr 2010
Location: Adelaide
Posts: 13,137
Thanks: 135
Thanked 1,530 Times in 1,047 Posts
Feedback Score: 2 reviews
Check the movement of the brake piston in its bore...
Nico is offline  
post #6 of 14 (permalink) Old 10-31-2010, 05:34 PM
Pocketbike Racer
 
z537z's Avatar
 
Join Date: Jun 2010
Posts: 254
Thanks: 0
Thanked 3 Times in 3 Posts
Feedback Score: 10 reviews
The rear brake is a bitch to bleed, without using a vacuum, EZ bleeders, or other "helper" accessories.
If it won't tighten up then you didn't bleed it right!
Or there's a small chance the piston needs rebuilding - but that shouldn't happen unless you were frigging with it or it's 10 years old.

__________________________________________

z537z is offline  
post #7 of 14 (permalink) Old 10-31-2010, 05:37 PM
Demented
Guest
 
Posts: n/a
The rear is only a bitch to bleed if you don't know how to bleed brakes, the same with the front. Unfortunately, too many people try doing work themselves thinking they know what they're doing but have no clue.
post #8 of 14 (permalink) Old 11-02-2010, 01:35 PM
Knee Dragger
 
AWellman's Avatar
 
Join Date: Apr 2009
Location: Cincinnati
Posts: 180
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
so would care to explain the proper way then?

thanks.

Aaron

07 CBR600RR
-ProGrip red reflective rim tape
-Two Brothers CF Slip On
-Tripage FE (hugger)
-08 red lowers
-Satin Black mids
-Power coated
-subframe- matte black
-rearsets- matte black
-pegs- red
-hand levers- matte black
-Puig DB dark Smoke
-(more to come)


Two Brothers Sound-
http://www.youtube.com/watch?v=OSof-a5yIXY
AWellman is offline  
post #9 of 14 (permalink) Old 11-02-2010, 02:13 PM
Demented
Guest
 
Posts: n/a
1) Suck out old brake fluid from reservoir
2) Fill reservoir with new fluid. Add more as needed when bleeding.
3) Attach hose to bleed nipple to drain into a container to recycle brake fluid, or to destroy a hated neighbor's lawn.
4) Apply pressure to brake pedal
5) Open bleed nipple and then close once pressure has been relieved
6) Pump brake pedal to regain pressure and keep pressure on the pedal
7) Repeat steps 4-6 until fluid coming out is clean
8) Top off reservoir to proper level, clean up any spilled brake fluid, and place cap on reservoir.

Should not take you more than 1 minute to bleed the rear brake, and that includes getting everything set-up. If I had a reservoir on my rear I'd make a video showing how easy it is.
post #10 of 14 (permalink) Old 11-02-2010, 02:43 PM
Administrator
 
Nico's Avatar
 
Join Date: Apr 2010
Location: Adelaide
Posts: 13,137
Thanks: 135
Thanked 1,530 Times in 1,047 Posts
Feedback Score: 2 reviews
Quote:
Originally Posted by AWellman View Post
so would care to explain the proper way then?

thanks.
Same as D, but with a little more detail, just posted this in another thread as well :)



To properly bleed your brakes:

***NEVER do both front and rear at the same time! Do the front, ensure correct operation then do the rear!***

Do nipples in this order: MC, Right Side, Left Side, Right Side, Left Side.

1. Wipe down all surfaces around the brake components, and anything above them to prevent any contamination of the system

2. Put a piece of tube over the nipple, run it to a container

3. Get your resivoir level

4. Remove the cap from the resivoir then place back on top, again to prevent crap getting in (don't do it up)

5. Squeeze the brake lever and hold in (use a cable tie to hold it if you like)

6. Undo the nipple slowly so that the fluid runs out (the lever will go in further at this point)

7. Do the nipple back up

8. Let go of the lever and squeeze again

9. Repeat cycle until fluid runs clear and there are no air bubbles, then move on to the next point.

Once you are done make sure that the nipples are all done up correctly and that you have good a good lever (you can feel the pressure in the system)

Take the bike for a ride at LOW speed and test the brakes, this is why you don't screw with both at the same time cause you don't want to go for your test ride and find you have no brakes at all.

Once you have completed your test ride inspect the brake nipples for any fluid seepage and rectify as necessary.

Now do the rear...

After a week or so has passed, reinspect the bleeder nipples for seepage.

Don't(s):

Let the master cylinder run out of fluid, keep it above 1/4 cause you will have to start again if you let any air in

Allow brake fluid to get onto paintwork or tyres

NEVER reuse fluid

Leave either the master cylinder or bottle of fluid uncovered

Use a different fluid (it's also best to use the same brand, if your unsure and just topping it up - do a full flush)

Clean anything besides the piston seal grove with brake fluid

Allow the piston to extend to far as its a bitch to get back in

Allow water within a 3 mile radius of the brake fluid, its hygroscopic meaning it will absorb water, leading to corrosion inside the brake system and catastrophic failure may result (that's a bad thing)
Nico is offline  
post #11 of 14 (permalink) Old 11-03-2010, 02:54 PM
Knee Dragger
 
AWellman's Avatar
 
Join Date: Apr 2009
Location: Cincinnati
Posts: 180
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
The thing is lol is that that is what I did.
Just for some reason the brake still isn't 100% lol
Idk what's up

Aaron

07 CBR600RR
-ProGrip red reflective rim tape
-Two Brothers CF Slip On
-Tripage FE (hugger)
-08 red lowers
-Satin Black mids
-Power coated
-subframe- matte black
-rearsets- matte black
-pegs- red
-hand levers- matte black
-Puig DB dark Smoke
-(more to come)


Two Brothers Sound-
http://www.youtube.com/watch?v=OSof-a5yIXY
AWellman is offline  
post #12 of 14 (permalink) Old 11-03-2010, 03:19 PM
Demented
Guest
 
Posts: n/a
Quote:
Originally Posted by AWellman View Post
The thing is lol is that that is what I did.
Just for some reason the brake still isn't 100% lol
Idk what's up
You're probably letting air into the system, or are dealing with the placebo effect.
post #13 of 14 (permalink) Old 11-05-2010, 12:26 PM
Knee Dragger
 
AWellman's Avatar
 
Join Date: Apr 2009
Location: Cincinnati
Posts: 180
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by Demented View Post
You're probably letting air into the system, or are dealing with the placebo effect.
placebo effect??? lol

Aaron

07 CBR600RR
-ProGrip red reflective rim tape
-Two Brothers CF Slip On
-Tripage FE (hugger)
-08 red lowers
-Satin Black mids
-Power coated
-subframe- matte black
-rearsets- matte black
-pegs- red
-hand levers- matte black
-Puig DB dark Smoke
-(more to come)


Two Brothers Sound-
http://www.youtube.com/watch?v=OSof-a5yIXY
AWellman is offline  
post #14 of 14 (permalink) Old 11-05-2010, 12:42 PM
Demented
Guest
 
Posts: n/a
Quote:
Originally Posted by AWellman View Post
placebo effect??? lol
It happens more than people think. They look for or think there's a problem, and their brain tells them something isn't right when nothing is actually wrong.
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the 600RR.net 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



Posting Rules  
You may not post new threads
You may not 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