920 990 & 1090 brake rebuild kits - MVAgusta.net
 6Likes
  • 1 Post By falcn
  • 1 Post By esq'z me
  • 4 Post By mitchy
 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old 11-20-2019, 12:10 AM Thread Starter
New Member
 
Chuckles2Wheels's Avatar
 
Join Date: Oct 2019
Location: Sydney, Australia
Posts: 22
920 990 & 1090 brake rebuild kits

Hi All,


Does anyone know of any rebuild kits for front MC?
My still seems spongy after bleeding.



Thanks in advance.

2012 Brutale 920 (Weekend Toy)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



2018 Suzuki Address 110 (Daily Ride)
2017 Hyosung 650GTR (Track bike project)
2015 CF Moto 150 (deceased)
2010 Kawasaki ZX-10R (Sold)
2009 Suzuki GSX-F 650 (deceased)
Chuckles2Wheels is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 11-20-2019, 08:10 AM
Senior Member
 
silentservice703's Avatar
 
Join Date: Feb 2008
Location: Duxbury, MA, USA
Posts: 21,198
Send a message via Skype™ to silentservice703
There is probably still a small amount of air in your system. It only takes one little bubble to give a spongy feel.

Were your Master Cylinder seals leaking by, you would slowly lose pressure as you held the brake lever taught.

Some things to try:

Bleed at the upper banjo connection by cracking it slightly open, applying lever pressure carefully, tightening the connection, then releasing pressure.

With the reservoir cap off, "tap" the brake lever in very short staccato bursts and look for bubbles to release into the fluid. (This is a small motion)

Remove the calipers and push the pistons all the way into the caliper. Block them in place. Bleed the calipers while elevating them. Reinstall.

Gapalicious 2020 at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
from Sept. 23-Sept.27, 2020

Call (423) 519-2000 or (423) 253-6213 to reserve your Riverfront Cabin. PM me for The Crow's Nest reservation!!!

Email/Paypal:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



'07 F4 312R, '10 B4 1090RR, '15 B3 800RR
'07 Ducati Monster S4Rs, '07 Ducati Monster 695
2010 Harley Davidson Ultra-Classic Electra-glide CVO FLHTCUSEBLK
'63 Honda C100A Cub
'61 MVA TRA 125
silentservice703 is offline  
post #3 of 10 (permalink) Old 11-20-2019, 08:15 AM
Senior Member
 
silentservice703's Avatar
 
Join Date: Feb 2008
Location: Duxbury, MA, USA
Posts: 21,198
Send a message via Skype™ to silentservice703
Does your bike have ABS?

Gapalicious 2020 at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
from Sept. 23-Sept.27, 2020

Call (423) 519-2000 or (423) 253-6213 to reserve your Riverfront Cabin. PM me for The Crow's Nest reservation!!!

Email/Paypal:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



'07 F4 312R, '10 B4 1090RR, '15 B3 800RR
'07 Ducati Monster S4Rs, '07 Ducati Monster 695
2010 Harley Davidson Ultra-Classic Electra-glide CVO FLHTCUSEBLK
'63 Honda C100A Cub
'61 MVA TRA 125
silentservice703 is offline  
Sponsored Links
Advertisement
 
post #4 of 10 (permalink) Old 11-20-2019, 12:52 PM
Senior Member
 
falcn's Avatar
 
Join Date: Apr 2018
Location: Los Altos Hills, CA
Posts: 282
New Site Garage
Quote:
Originally Posted by silentservice703 View Post
There is probably still a small amount of air in your system. It only takes one little bubble to give a spongy feel.

Were your Master Cylinder seals leaking by, you would slowly lose pressure as you held the brake lever taught.

Some things to try:

Bleed at the upper banjo connection by cracking it slightly open, applying lever pressure carefully, tightening the connection, then releasing pressure.

With the reservoir cap off, "tap" the brake lever in very short staccato bursts and look for bubbles to release into the fluid. (This is a small motion)

Remove the calipers and push the pistons all the way into the caliper. Block them in place. Bleed the calipers while elevating them. Reinstall.
Put a banjo with a bleeder in at the reservoir point, it just makes it easier.

Get a pneumatic vacuum bleeder as well.

If you have ABS, as hinted by SilentService asking, the procedure is a little more involved.
silentservice703 likes this.

2010 Brutale 990R - 1994 Elefant 900 - 2006 KTM 450EXC Street Legal
falcn is offline  
post #5 of 10 (permalink) Old 11-20-2019, 05:56 PM Thread Starter
New Member
 
Chuckles2Wheels's Avatar
 
Join Date: Oct 2019
Location: Sydney, Australia
Posts: 22
Thanks for the replies.
None ABS model.
I do use a vacuum bleeder hooked to a compressor.

The lever has always been somewhat spongy when i bought it.
Even after using half a bottle of fluids still not a big improvement.

2012 Brutale 920 (Weekend Toy)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



2018 Suzuki Address 110 (Daily Ride)
2017 Hyosung 650GTR (Track bike project)
2015 CF Moto 150 (deceased)
2010 Kawasaki ZX-10R (Sold)
2009 Suzuki GSX-F 650 (deceased)
Chuckles2Wheels is offline  
post #6 of 10 (permalink) Old 11-21-2019, 07:03 AM
Old Wing Nut
 
esq'z me's Avatar
 
Join Date: Aug 2007
Location: Marietta, GA
Posts: 18,499
Send a message via Skype™ to esq'z me
Quote:
Originally Posted by Chuckles2Wheels View Post
Thanks for the replies.
None ABS model.
I do use a vacuum bleeder hooked to a compressor.

The lever has always been somewhat spongy when i bought it.
Even after using half a bottle of fluids still not a big improvement.
Your air pressure may be too high. When using a pneumatic vacuum bleeder air pressure should be around 60 psi. More than 90 will cause problems.
High pressure moves the fluid so fast that wall friction creates turbulence. That turbulence introduces very tiny air bubbles into the fluid. Once the bike sits over a short period those very tiny bubbles coalesce into larger bubbles and the lever gets soft again.


Another tip is to let the bike sit at least overnight and then remove the reservoir cap, lower the fluid level, then push the caliper pistons back in their bores.
This moves the fluid up into the reservoir, and along with it any air bubbles.....which will naturally migrate upward as the bike sits.

Then pump the lever slowly to push the calipers back out and finally top off the reservoir.

Chuck's tip about lightly tapping the lever (staccato pressure) also helps get those tiny bubbles to float out into the reservoir.
falcn likes this.

I used to be fast....now I just dream about it.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

'08 910R (Gina), '04 F4 SPR #275 Track Bike (Lola), YSR50 (The Rabbit), '71 CB100 (Lil' Red), '75 RD350C (Orange Bird) restoration project, '70 Suzuki F50 (Baby Blue)

Last edited by esq'z me; 11-21-2019 at 07:08 AM.
esq'z me is online now  
post #7 of 10 (permalink) Old 11-21-2019, 12:21 PM
Senior Member
 
falcn's Avatar
 
Join Date: Apr 2018
Location: Los Altos Hills, CA
Posts: 282
New Site Garage
I haven't been able to locate a rebuild kit. Not sure which Nissin email to use to ask about repairs.

Time to upgrade the master cylinder to Brembo or Magura or ISR or ...?

2010 Brutale 990R - 1994 Elefant 900 - 2006 KTM 450EXC Street Legal

Last edited by falcn; 11-21-2019 at 12:23 PM.
falcn is offline  
post #8 of 10 (permalink) Old 11-21-2019, 04:39 PM
Senior Member
 
Deano's Avatar
 
Join Date: Nov 2011
Location: Townsville, QLD
Posts: 809
New Site Garage
Brembo 19RCS works well. Never rated the original Nissin, always needed bleeding and not powerful. You may need a longer brake line and the banjo bolt is a different pitch thread. You will need a Brembo micro switch for the brake light and cut and solder the wires from the switch block. Most important consideration is the mirror mounting. Brembo do threaded clamps but the std. mirror just doesn't look or sit right. Bar ends or something like std. Yamaha MT-09, Rizoma mirrors. Not much room for mirror clamps on the bars, not enough room.

Cheers

Deano

2009 1078RR Brutale
Deano is offline  
post #9 of 10 (permalink) Old 11-21-2019, 10:31 PM
MVAgusta.net Sponsor
 
mitchy's Avatar
 
Join Date: Feb 2010
Location: Gold Coast, Australia.
Posts: 5,087
New Site Garage
Send a message via Skype™ to mitchy
I have had more problems than not with a vacuum bleeder.
Bleed your brakes the conventional way by connecting clear plastic tubing from the brake bleeder to a container half full of water or brake fluid.
Compress the lever.Open and shut the bleeder valve,then release the lever.
Do this 6 times on each caliper,starting with the R/H caliper first.
See how you go.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Bike- F4 1078 312rr
Work.Email & Paypal.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Work Phone (+61)0755244655
Facebook- Mitch Covington
Mobile-0423041326
mitchy is offline  
post #10 of 10 (permalink) Old 11-24-2019, 06:42 PM Thread Starter
New Member
 
Chuckles2Wheels's Avatar
 
Join Date: Oct 2019
Location: Sydney, Australia
Posts: 22
Thanks all for the great tips.
I did clamp the lever open over night, that has helped abit i think (lost all reference point after all the squeezing)

I'll take the calipers off and do a deep clean and look at the pistons, good to check those anyways.
Lever has abit of travel before good strong pressure, bike has over 5000km on it so maybe just worn pads also.

Wish me luck.

2012 Brutale 920 (Weekend Toy)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



2018 Suzuki Address 110 (Daily Ride)
2017 Hyosung 650GTR (Track bike project)
2015 CF Moto 150 (deceased)
2010 Kawasaki ZX-10R (Sold)
2009 Suzuki GSX-F 650 (deceased)
Chuckles2Wheels is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to use all of the features of the MVAgusta.net site, 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
Display Modes
Linear Mode Linear Mode



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