Brake Lever Loses Pressure - Honda Motorcycles -
Honda FireBlade Discussion of the Honda CBR 900RR, Honda CBR 929RR, Honda CBR 954RR, and Honda CBR 1000RR Motorcycles.

User Tag List

  • 1 Post By nigelrb
LinkBack Thread Tools
post #1 of 3 Old 08-06-2019, 10:02 PM Thread Starter
Join Date: 08-06-2019
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
Brake Lever Loses Pressure

I have a '00 929, I put steel-braided lines on the front end 1 year ago and at the same time, replaced the pads, and fluid with DOT 5.1. The initial bite and brake performance was amazing up until about a month ago. I was had to ride home in the rain after work which wasn't a big deal until I noticed that I had to pull the lever further to get the brakes to have any effect. I let the bike sit for a few weeks and I come back to check the lever and it goes all the way to the bar. I vacuum-bled each caliper and got a lot of air out on both sides. The brake lever had pressure again, but it is not the same as when I replaced the parts. After a few days of riding, I notice the same thing happening and I have to pull the lever further to get engagement. I have CRG shorty levers and last year I had it set to the fourth position (away from the bar). Now I have it fully extended in the sixth position in order to make it work.

Any help is appreciated!
LSoydara is offline  
Sponsored Links
post #2 of 3 Old 08-07-2019, 2:48 AM
Supporting Member
nigelrb's Avatar
Join Date: 04-16-2019
Location: Worcester, England
Posts: 491
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 130 Post(s)
Reputation Power: 6
Send a message via Skype™ to nigelrb
Re: Brake Lever Loses Pressure

It sure sounds as if you have an air leak somewhere in the system. First point would be to check all the barrel joints for correct torque. Might there be a washer missing from one of them?

Second point would be, was the system okay before you installed the CRG levers? Could there be a fault in the fitting at the Master Cylinder point?

Third point, is there anything significant that happened a month ago that might have affected hoses or front end?

I am fairly certain your problem can only be cause by air getting in the system!
BigdaddyPaz likes this.

2018 CBR1000RR SP2 / 2004 CBR1000RR / 2003 CBR954RR / 2001 CBR929RR (Erion Racing Edition)
1985 Honda VF1000R / 1985 Honda NS400R
2007 MV F4 1000R / 2020 Daytona 765 Moto 2 Replica (on order)
nigelrb is online now  
post #3 of 3 Old 08-08-2019, 10:23 PM
Join Date: 11-28-2014
Location: San Diego, California
Age: 33
Posts: 195
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Reputation Power: 9
You may need to rebuild your brake master cylinder. Parts are cheap and it can be done with basic tools and circlip pliers. Given the age of the bike I would say it's time. My old 929 had this issue about a year ago. You can also somewhat bleed the Master cylinder by holding the lever and cracking the banjo bolt.

2001 929RR
1993 Kawasaki KLR 650
Pablo.gyds03 is offline  

  Lower Navigation
Go Back   Honda Motorcycles - > Honda Motorcycle Models > Honda FireBlade

Quick Reply

Register Now

In order to be able to post messages on the Honda Motorcycles - 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
A valid e-mail address is REQUIRED. You will not have access to any site features until you activate your account using the activation e-mail that is sent to this address.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

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 Off
Pingbacks are Off
Refbacks are Off

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