zx9r brake shudder

For general Technical and Performance Discussions

zx9r brake shudder

Postby 98ninja » Fri Aug 19, 2011 11:14 am

When I'm heading into turn 2 at eastern creek, I get on the brakes and the lever shudders.
Initially the brakes dont bite. I have to let the lever go then try again before the brakes work.
The bike is a 99 zx9r. It has goodridge braided lines. The brakes have basically no feel to them.
As far as my options go, what can I do to:
a) get rid of the brake shudder
b) provide better feel
c) bolt on other parts as an upgrade
99 zx9r - back
User avatar
98ninja
KSRC Regular
KSRC Regular
 
Posts: 692
Joined: Fri Jul 22, 2005 6:08 pm
Location: Inverell
Bike: ZX9R
State: New South Wales

Re: zx9r brake shudder

Postby MadKaw » Fri Aug 19, 2011 11:28 am

Does it only do it at turn 2.?

Disks straight.?
Wheel straight and balanced correctly.?
Front suspension been serviced, not bottoming.?
Dave
2010 Z1000
ex bikes
05 ZX-10R Race Bike - No.77
95 ZXR750R M Race Bike - No. 75
98 ZX9R Race Bike - No. 000
zx6r, zx7r, GPX750, GPX500, lots of KX's.
Image
I ride way too fast to worry about cholesterol
User avatar
MadKaw
Administrator
Administrator
 
Posts: 9670
Joined: Tue Apr 20, 2004 4:33 pm
Location: Windsor or the Creek..
Bike: ZX10R
State: New South Wales

Re: zx9r brake shudder

Postby 98ninja » Fri Aug 19, 2011 11:30 am

Yeah, only into turn 2.
No handling problems anywhere else.
Its mainly the problem that I almost ran off the track a few times
and the complete lack of feel from the brakes.
99 zx9r - back
User avatar
98ninja
KSRC Regular
KSRC Regular
 
Posts: 692
Joined: Fri Jul 22, 2005 6:08 pm
Location: Inverell
Bike: ZX9R
State: New South Wales

Re: zx9r brake shudder

Postby MadKaw » Fri Aug 19, 2011 11:37 am

Strange its only turn 2, hence why it makes me thinks it may not be just the brakes.
Check the things I mentioned above, and add to that the steering head bearings.
The brakes on the 9 are usually pretty good, but a service of the calipers and master cylinder may be whats needed.
Dave
2010 Z1000
ex bikes
05 ZX-10R Race Bike - No.77
95 ZXR750R M Race Bike - No. 75
98 ZX9R Race Bike - No. 000
zx6r, zx7r, GPX750, GPX500, lots of KX's.
Image
I ride way too fast to worry about cholesterol
User avatar
MadKaw
Administrator
Administrator
 
Posts: 9670
Joined: Tue Apr 20, 2004 4:33 pm
Location: Windsor or the Creek..
Bike: ZX10R
State: New South Wales

Re: zx9r brake shudder

Postby 98ninja » Fri Aug 19, 2011 11:40 am

Its time for a visit to castle hill then
99 zx9r - back
User avatar
98ninja
KSRC Regular
KSRC Regular
 
Posts: 692
Joined: Fri Jul 22, 2005 6:08 pm
Location: Inverell
Bike: ZX9R
State: New South Wales

Re: zx9r brake shudder

Postby z900/zx9 » Fri Aug 19, 2011 3:29 pm

I have had both my 9s at the track and the only time i had a front end shudder was when it did a mad cow :shock: Yep riding around and the top nut was spinning around,completed lap and tightned no probs.As far as feel goes only had one issue lever needed lube as it was a bit grabby witch gave the effect of having a notchy feel or pull the brakes on twice.Lubed the pivot point and good as gold.I also use genuine nissen pads which have plenty of feel.
http://tinypic.com/hu369k.jpg[/img]
[b]Z900, z900RS , H2 Ninja 1000 Supercharged. FPV Supercharged Pursuit ute..
User avatar
z900/zx9
KSRC Contributor
KSRC Contributor
 
Posts: 2796
Joined: Wed Nov 02, 2005 1:33 pm
Location: Kawasakiville Victoria

Re: zx9r brake shudder

Postby Zedex 6 » Thu Aug 25, 2011 8:33 pm

I had this issue, on my road and track bike, You'll possibly find the floating rotors are seized and need loosening and lubing. If the rotors can't move that won't centralize themselves.
Zedex 6
Warming up
Warming up
 
Posts: 48
Joined: Tue Apr 13, 2010 10:47 pm
Bike: ZX6R
State: New South Wales

Re: zx9r brake shudder

Postby tim » Fri Sep 16, 2011 9:11 pm

get this sorted?
2008 ZX6R Special Edition
User avatar
tim
VIP MEMBER
VIP MEMBER
 
Posts: 5815
Joined: Wed Dec 10, 2008 10:12 pm
Location: Sydney, NSW
Bike: ZX6R
State: New South Wales

Re: zx9r brake shudder

Postby 98ninja » Thu Oct 06, 2011 8:03 pm

its at allfixed.
its getting a kit run through the master cylinder. It feels like its been lubed
with gravel
Also its getting new front discs. Hopefully that will sort it out.
99 zx9r - back
User avatar
98ninja
KSRC Regular
KSRC Regular
 
Posts: 692
Joined: Fri Jul 22, 2005 6:08 pm
Location: Inverell
Bike: ZX9R
State: New South Wales


Return to General Tech & Performance Talk

Who is online

Users browsing this forum: No registered users and 17 guests

cron