Brake bleed debacle - Page 2 - Ducati.ms - The Ultimate Ducati Forum
Reply
 
LinkBack Thread Tools Display Modes
post #11 of 17 (permalink) Old Apr 10th, 2019, 7:44 pm
Member
 
Piscatory_6's Avatar
 
Join Date: Mar 2015
Location: Aberdeen, WA, USA
Posts: 68
I read somewhere that a guy put a banjo bleeder on the rear master cylinder and no problems since. I'm thinking of trying that.

Current bikes: 2014 Ducati Multistrada S Touring
Piscatory_6 is offline  
Sponsored Links
Advertisement
 
post #12 of 17 (permalink) Old Apr 15th, 2019, 1:56 pm Thread Starter
Senior Member
 
pcv57's Avatar
 
Join Date: Dec 2008
Location: Avon, CT, USA
Posts: 236
I was mistaken about the front calipers...the bleed nipple is at the top. Front brakes have been bled and are ok. I removed the rear caliper, raised it up and bled it and got some air out of the line. I installed a bleeder at the ABS but I have not gotten any air out of it yet. I also took it out and engaged the ABS on the rear brake only 10 times as previously posted. The rear brake was much better but after a 200 mile ride, it's back to being soft again.
I was a post about a service bulletin addressing the rear brake issue but it's dated back from 2011. Should i assume that any bikes manufactured after 2011 have this fix installed? I'm debating whether to bring this to the dealer or not. I'm wondering if installing the HH sintered pads will help at all
pcv57 is offline  
post #13 of 17 (permalink) Old Apr 15th, 2019, 3:03 pm
Senior Member
 
U235Power's Avatar
 
Join Date: Jan 2011
Location: Central Coast, California, USA
Posts: 178
Garage
Quote:
Originally Posted by porkrind View Post
What I dorm which gets me to a sort of acceptable rear brake is this...

I unmount the caliper and undo all the clips that remain the brake line. That gets me enough free ply that I can put the caliper on the rear seat, and with some careful use of twine, I can keep the brake line routed so it doesn't dip or create a low spot on its way up to the seat.

Then I use my Motive power bleeder (the cap I had for my Lotus and my BMW conveniently fits the rear reservoir) filling it with a liter or more of fluid, pressurizing it, then letting it pump almost all of that fluid through the system at pressure.

I wish there was a way to trigger the ABS pumps while doing this but thatís a pipe dream. I am reasonably convinced that the last air bubble Iím trying to eliminate is in the plumbing for the linked brakes and thus not part of the regular fluid path. Maybe.

Anyway, I can lock up the rear, even if it is a little spongy. And I can definitely feel the difference when the computer is doing the linked braking thing as it firms up all of a sudden.

Itís livable. If it starts to irritate me I just wind on and pop a small wheelie. Then all is well.
I did something similar with success... In addition I added a speed bleeder and swapped to Dot 5.1 based on a local non-affiliated shop mechanics recommendation. After the bleed, I did a few short runs to activate the ABS (I used urban mode as that has the most intrusive ABS). Rear brake has been great for over a year now.

-c-
___________________________________
Red '11 S Touring
'05 Suzuki V-Strom 1000 w/ 120+K miles
U235Power is offline  
 
post #14 of 17 (permalink) Old Apr 16th, 2019, 6:16 am
Senior Member
 
Wolverine1's Avatar
 
Join Date: May 2016
Location: Gettysburg, Pa, US
Posts: 419
Garage
Quote:
Originally Posted by pcv57 View Post
Should i assume that any bikes manufactured after 2011 have this fix installed? I'm debating whether to bring this to the dealer or not. I'm wondering if installing the HH sintered pads will help at all
The HH helped mine. I think you need to re-bleed until the rear circuit is air free. I bleed with fresh Motul RBF600 every spring and I always have a firm pedal. A proper bleed is key but it seems most can't achieve it.
In '13 they got a 45 degree outlet on the master and a larger bore but if you keep reading that wasn't an end all fix.

'10 MTS1200 S
'00 VTR1000f
Wolverine1 is offline  
post #15 of 17 (permalink) Old Apr 16th, 2019, 10:55 am
Senior Member
 
Join Date: Oct 2014
Location: Fort Collins, CO, USA
Posts: 368
Quote:
Originally Posted by Piscatory_6 View Post
I read somewhere that a guy put a banjo bleeder on the rear master cylinder and no problems since. I'm thinking of trying that.
While it may have worked in the one instance, I'm not convinced that bleeding at the lowest point in the circuit will provide consistent results. The fact there was air at the lowest point I think is more indicative of an ineffective bleed to begin with.

'13 MTS GT / '99 ST2
'07 Monster 695 - Sold
post #16 of 17 (permalink) Old Apr 16th, 2019, 11:20 am
Senior Member
 
Join Date: Sep 2015
Location: Bellevue, WA, USA
Posts: 266
Garage
Sometimes I think this "crappy rear brake" thing feeds upon itself, we read a number of threads with lots of replies and complaints and that sets us off on a journey. "Soft" vs "Firm" always seems subjective to me, especially if you have more than one bike and are [subconsciously] making comparisons. I spent some time bleeding my rear brake last year; I also adjusted the pedal position which made quite a bit of difference to "feel". Obviously, one should take care to ensure that the brake is not binding at rest.

Now my test is simple: can I lock the rear wheel and trigger ABS at low speed, with no front brakes? If it's yes, then I'm done and stop worrying about it: in a real emergency, you're going to pull and stamp down much harder than normal; all the weight of this big bike is going pitch forward and the load is all going to be on the front tyre and brakes; imho, the contribution of the rear brake is probably limited, relatively speaking, under those conditions.

1976 RD400 (Project), 1997 916 Biposto, 2013 Street Triple R, 2014 Multistrada 1200S
herveyw is offline  
post #17 of 17 (permalink) Old Apr 16th, 2019, 1:00 pm
Junior Member
 
anojones's Avatar
 
Join Date: Mar 2018
Location: Eastern Washington, ,
Posts: 11
Garage
On my 2013 the lever is very soft compared to other bikes I've had. However, I can kick on the ABS stomping on it in a parking lot. It is super slow to stop, but I suppose if the ABS is on I am at limits of traction anyway. For the street, I don't have a problem since I'm all about the front brake. Might be an issue for those who are doing more offfroad.

2013 1200 Multistrada GT
anojones is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ducati.ms - The Ultimate Ducati Forum 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













Similar Threads
Thread Thread Starter Forum Replies Last Post
A new theory of that crappy rear brake... drdave39 Multistrada 77 Apr 9th, 2019 9:24 am
New way of fixing your useless rear brake when all else has failed Damascus Multistrada 44 Feb 17th, 2019 6:46 pm
Front Brake Master Cylinder Bleed Screw Smilin' Jack Sport Classic 7 Nov 28th, 2018 6:55 pm
Smart Brake Module from STS install on 2013 Diavel Occams_Razor Diavel 2 Jan 17th, 2018 6:46 pm
Ducati 998 Rear Brake Issues Heisenberg Tech Forum 2 Aug 9th, 2016 8:15 am

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