What the hell is wrong with my front brakes - 600RR.net
Troubleshooting Having trouble with your bike? Common know issues or trobuleshooting questions here.

 
LinkBack Thread Tools
post #1 of 13 (permalink) Old 05-07-2015, 05:48 PM Thread Starter
Training Wheel Hero
 
Join Date: Nov 2012
Posts: 15
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
What the hell is wrong with my front brakes

2007 rr

Just doing a bunch of stuff this spring. I replaced the brake lever while the calipers were off, no even thinking about it. Put the left caliper back on no trouble. The right caliper pistons wouldn't go back in, so to get them in and get the caliper back on I had to open the bleed screw and they went in no trouble. Went to ride it and had no front brakes at all, no stopping power and no brake lever feel at all. I assumed I got air in the lines. Next was to bleed them. While bleeding them very little fluid came out, I know normally it should shoot out the lines. No air was in the lines at all and brake lever pressure didn't return when I was done bleeding. I took it around the block and lever feel returned the brakes worked great for about 30 seconds, then they seized! Attempted to bleed again. When i first opened the left caliper bleed screw fluid shot out as it should when being bleed. The 2nd time I opened the bleed screw on the left caliper next to no fluid came out. Next to no fluid from the right caliper at all. After bleeding I was right back to square one with no feel and no brakes. Took it around the block and again it returned again and seized again. Next I decided to attempt to flush all of the old fluid out. Opened all 3 bleed screws filled the reservoir and started pump the brake lever and next to nothing came out from the calipers and not a drop from the master and the reservoir remained full. I tried to bleed again. No brakes and no lever feel and it did not return this time at all. So I've got no front brakes. Rear is fine.

Whats going on here?
A lot of air in the lines?
Clog?
Bad front master?
Crushercurtis is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 05-07-2015, 05:55 PM
Moto GP Racer
 
Bridge_Jumper's Avatar
 
Join Date: May 2012
Location: Land O' Cheese
Posts: 7,440
Thanks: 370
Thanked 1,167 Times in 990 Posts
Feedback Score: 5 reviews
Try bleeding the master cylinder again. You have to open the bleeder and pump the lever a few times (do not close the bleeder between pumps). Then bleed your lines

2006 Honda CBR600RR Black Tribal Edition
2W1R - IceTitan
Bridge_Jumper is offline  
post #3 of 13 (permalink) Old 05-07-2015, 06:09 PM Thread Starter
Training Wheel Hero
 
Join Date: Nov 2012
Posts: 15
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
^Wont it suck air back in though?
Crushercurtis is offline  
 
post #4 of 13 (permalink) Old 05-07-2015, 06:14 PM
Moto GP Racer
 
Bridge_Jumper's Avatar
 
Join Date: May 2012
Location: Land O' Cheese
Posts: 7,440
Thanks: 370
Thanked 1,167 Times in 990 Posts
Feedback Score: 5 reviews
Nope. STG has a video on youtube that shows it. When I put a 07+ MC on my bike I thought it would suck air back in as well, but it doesn't. When you do the lines you will have to close the bleeders between pumps though

2006 Honda CBR600RR Black Tribal Edition
2W1R - IceTitan
Bridge_Jumper is offline  
post #5 of 13 (permalink) Old 05-07-2015, 07:51 PM
BOTM Winner 07/16
 
rinonz's Avatar
 
Join Date: Jun 2012
Location: NZ
Posts: 880
Thanks: 3
Thanked 182 Times in 154 Posts
Feedback Score: 0 reviews
I think your master cylinder pin is installed incorrectly. Since you mentioned you change the lever.

It stuck on the pressed position.

There is a little indentation on the brake lever where the pin needs to go

It can rotate causing the pin to not sit in the slot and basically you have your brake on all the time.

Then when you bled it, it removes all the fluid out and you're basically running a dry brake system hence why there is no brake.
rinonz is offline  
post #6 of 13 (permalink) Old 05-07-2015, 09:42 PM Thread Starter
Training Wheel Hero
 
Join Date: Nov 2012
Posts: 15
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
I'll pull the handle off again tomorrow and post a pic for you guys to see.
Crushercurtis is offline  
post #7 of 13 (permalink) Old 05-08-2015, 12:43 AM
Moto GP Racer
 
FightingChance's Avatar
 
Join Date: Apr 2007
Location: Los Angeles, CA
Posts: 7,043
Thanks: 0
Thanked 700 Times in 601 Posts
Feedback Score: 10 reviews
Rinonz could be onto something. Also there is a preferred order to bleeding, if you do it in the wrong sequence you can end up chasing your tail. I like this explanation:

https://www.600rr.net/vb/showpost.php...95&postcount=2
FightingChance is offline  
post #8 of 13 (permalink) Old 05-10-2015, 02:23 PM Thread Starter
Training Wheel Hero
 
Join Date: Nov 2012
Posts: 15
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Bump
The rod rod fits into the slot just fine. Does the rod look stock? I replaced an aftermarket short lever with the "oem" one. Could the rod be aftermarket specific to the shorty lever. I've never heard of this if so. Before I removed the lever just now I grabbed the lever a few times, and even now with the air in the lines I'm not getting enough lever travel at all.


Crushercurtis is offline  
post #9 of 13 (permalink) Old 05-10-2015, 06:52 PM
BOTM Winner 07/16
 
rinonz's Avatar
 
Join Date: Jun 2012
Location: NZ
Posts: 880
Thanks: 3
Thanked 182 Times in 154 Posts
Feedback Score: 0 reviews
The round silver thing inside the "slot" on the lever. turn it until you see a dimple; the dimple is where the rod supposed to go to.
rinonz is offline  
post #10 of 13 (permalink) Old 05-10-2015, 07:10 PM
Moto GP Racer
 
FightingChance's Avatar
 
Join Date: Apr 2007
Location: Los Angeles, CA
Posts: 7,043
Thanks: 0
Thanked 700 Times in 601 Posts
Feedback Score: 10 reviews
Yeah, I wasn't going to say anything because I assumed the bushing just happened to rotate when he took the plunger out, but yeah if the rod is not in that slot your lever pull will be all freaked up
FightingChance is offline  
post #11 of 13 (permalink) Old 05-10-2015, 09:44 PM Thread Starter
Training Wheel Hero
 
Join Date: Nov 2012
Posts: 15
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
rinonz you beautiful genius!
Crushercurtis is offline  
post #12 of 13 (permalink) Old 05-10-2015, 10:05 PM
AMA Supersport Racer
 
digdah's Avatar
 
Join Date: Nov 2012
Location: Dallas
Posts: 940
Thanks: 4
Thanked 141 Times in 115 Posts
Feedback Score: 0 reviews
Bingo! Now your brakes will work just fine.

I had the same issue with mine when I went with some eBay levers. Coincidentally I fixed them inadvertently when in the process of taking them off to return them.
digdah is offline  
post #13 of 13 (permalink) Old 05-10-2015, 10:58 PM
BOTM Winner 07/16
 
rinonz's Avatar
 
Join Date: Jun 2012
Location: NZ
Posts: 880
Thanks: 3
Thanked 182 Times in 154 Posts
Feedback Score: 0 reviews
Good job for taking amazingly clear picture.. :)
rinonz is offline  
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