Brake rub - How much?

Got questions? We got answers....
Post Reply
User avatar
Varmint
KDXRider.net
KDXRider.net
Posts: 823
Joined: 01:33 pm Oct 27 2008
Country:
Location: Bristol, Connecticut
Contact:

Brake rub - How much?

Post by Varmint »

I'm going through rear brakes like no ones business. Two sets of Tusks (crap-100 miles each) and one set of EBC sintered (~300 miles).

How much rubbing, if any, should be occurring during free wheel spinning? When the bike is on the stand it is rubbing constantly as I spin the wheel.

The last time I changed them the pins looked ok; some surface anamolies but no grooves or pits.

Thanks for your help in advance.
In my garage
2003 KDX200
2003 KX85
2005 CRF230F
2009 300 XC-W(e)
My KDX
User avatar
MXOldtimer
Member
Posts: 575
Joined: 05:03 pm Jul 15 2006
Country:
Location: Pacific NorthWET, Oregon

Post by MXOldtimer »

Your brake pistons in the caliper might have some crud build-up and not letting the piston to return easily, smoothly. Also you could have some moister in your brake fluid that's pump'n up the brakes when they get hot.

Sounds like a good time to go through your brakes, front & rear.
04 KX-250 Hey.....at least it's green and smokes.
06 KDX-200 for off road play. Gone but not forgotten
07 KX-250F SOLD! I thump no more.
User avatar
Mr. Wibbens
KDXRider.net
KDXRider.net
Posts: 4884
Joined: 02:57 am Nov 07 2004
Country:
Location: Playing in the Poison Oak
Contact:

Post by Mr. Wibbens »

Mine rub but not much

OEM pads last a helluva lot longer than aftermarket pads

Image
Warning! This member tends to use sarcasm as a regular form of communication. If a post seems offensive, before you panic and fly off the handle, re-read the post and imagine it being said with a sideways grin.
((Bike Profile))
((Pics))
FIVE OUT OF FOUR PEOPLE DONUT UNDERSTAND FRACTIONS
User avatar
Indawoods
Creator and Founder
Creator and Founder
Posts: 9951
Joined: 09:59 am Jun 12 2003
Country:
Location: Midwest

Post by Indawoods »

I've always used OEM... get allot more out of them.
*** Administrator //***
****'95 KDX 200/****

"People ate cows a thousand years ago for the same reason we eat them now. Cause they are easy to catch.We're not savages,we're just lazy. A cheetah could taste like chocolate heroin. But will never know. Those bastards are fast!!! "
User avatar
Varmint
KDXRider.net
KDXRider.net
Posts: 823
Joined: 01:33 pm Oct 27 2008
Country:
Location: Bristol, Connecticut
Contact:

Post by Varmint »

>|QBB<[/url]
Mr. Wibbens wrote:Mine rub but not much

OEM pads last a helluva lot longer than aftermarket pads

Image
aahh, the old non-ring chain video. If I could get two full revolutions before it stopped I would be happy.

and mx, I did replace the brake fluid and put in some speed bleeders so I don't think that's the issue. I do agree that maybe I need to rip it apart, clean it out and replace the pins. I just wanted to make sure "some" rub was ok.

And where do you guys get the OEM pads? Before the last pad swap I tried getting OEM at my Kaw shop and when I got there he whipped out the EBC pads. He didn't get that I wanted OEM. He musta heard OhhEeeEmm ???
In my garage
2003 KDX200
2003 KX85
2005 CRF230F
2009 300 XC-W(e)
My KDX
User avatar
Mr. Wibbens
KDXRider.net
KDXRider.net
Posts: 4884
Joined: 02:57 am Nov 07 2004
Country:
Location: Playing in the Poison Oak
Contact:

Post by Mr. Wibbens »

Most bike shops can order OEM stuff
Warning! This member tends to use sarcasm as a regular form of communication. If a post seems offensive, before you panic and fly off the handle, re-read the post and imagine it being said with a sideways grin.
((Bike Profile))
((Pics))
FIVE OUT OF FOUR PEOPLE DONUT UNDERSTAND FRACTIONS
bronco95tgp
Member
Posts: 192
Joined: 09:39 pm Dec 01 2004
Country:
Location: Huntsville Al

Post by bronco95tgp »

bike bandit website you can get the part number for your bike's OEM pads I think. There is a link to that site on the LINKS page here.
its a '04 KDX 220 cadillac
User avatar
ihatefalling
Supporting Member
Posts: 410
Joined: 09:30 am Jul 20 2008
Country:

Post by ihatefalling »

I've been using the EBC MXS pads. They have held up really well.

http://www.ebcbrakes.com/motorcycle_bra ... ries.shtml
2005 KDX 220
R&B Carb Mod
R&B Head Mod
Fork Swap - 99 KX125 Valved for B woods plush
FMF Gnarley
Airbox Mod
Tagged
User avatar
canyncarvr
Gold Member
Gold Member
Posts: 6943
Joined: 01:07 pm Nov 05 2004
Country: US
Location: The Mythical State of Jefferson

Post by canyncarvr »

Re: 'and replace the pins.'

Very likely the problem. Has been with my bike more'n once anyway.

If the pins have divots worn in them, it's time for 'em to go.

..unless you don't mind going through pads like crazy.


Thumbs up on the OEM pads. They come as an 'assembly'..complete with SS backing plate and fiber isolater. EBCs come with that?


Nope.

Consider the source
Using a perceived level of knowledge to boost my self worth.
Non impediti ratione cogitationis

bike profile: !clicky!
KarlP
Supporting Member III
Supporting Member III
Posts: 1484
Joined: 02:26 pm Jun 29 2005
Country:
Location: Alabama

Post by KarlP »

I had worn my disc well below the service limit. That disc sure went through pads fast. When I replaced the disc, pad use went way down.

Had I known what that disc went for I would have taken better care of it. :lol:

OEM do seem to wear best
'08 KTM200xc
'99 CR/KDX Hybrid with that RB stuff done to it
KX100 for the boy
User avatar
canyncarvr
Gold Member
Gold Member
Posts: 6943
Joined: 01:07 pm Nov 05 2004
Country: US
Location: The Mythical State of Jefferson

Post by canyncarvr »

I assumed some basic things...like the OP's rotor doesn't look like a soup bowl.

It it does...his pads will wear like they're made from the soup that would fit in such a bowl.

Soft soup, too!

Consider the source
Using a perceived level of knowledge to boost my self worth.
Non impediti ratione cogitationis

bike profile: !clicky!
User avatar
jaydollar
Supporting Member III
Supporting Member III
Posts: 64
Joined: 02:24 pm Mar 09 2008
Country:
Location: dallas texas

Post by jaydollar »

and dont forget the master cylinder. there is tiny"bleed hole"in the bore that lets the fluid back in after you let off the pedal.it is only about .015-.020 in dia. and can easily get stopped up by a grain of sand.i found this out the hard way once after three rebuilds of the caliper.take the snap rings out and pull the piston out and look first with a flaslight to confirm blockage then use compressed air to blow out both small passages and check for daylight again.i had to strip a piece of copper wire and use a few strands to poke out some corrosion in mine.its a pain in the arse,but well worth the piece of mind.also dont take the cups off the piston,you will damage them,just gently clean them.J$.
1999 kdx 220
rb carb, rb head pump gas mod. 607 reeds, airbox lid drilled
fmf torque pipe
fmf turbine core Q
trail tech endurance computer
13/49 gear
IdahoCharley
Supporting Member II
Supporting Member II
Posts: 1005
Joined: 06:57 pm Mar 19 2005
Country:

Post by IdahoCharley »

Also make sure you do not overfill the master cylinder. If the level is too high the brake fluid can not return to the cylinder when it gets hot and expands and the brakes drag.

Basically if the brakes seem to drag more the longer you ride the bike - you may have overfilled the master cylinder.
KTM 380EXC Mine
KDX 200 Mark's
TTR 125 L Wife's
KDX 200 Austin's
EC 300 Tyson's
WR430 Husky - mine
User avatar
canyncarvr
Gold Member
Gold Member
Posts: 6943
Joined: 01:07 pm Nov 05 2004
Country: US
Location: The Mythical State of Jefferson

Post by canyncarvr »

>|<>QBB<
jaydollar wrote:and dont forget the master cylinder. J$
What was your symptom?

Did the MC return spring 'pull' fluid out of the caliper?

IC wrote:..you may have overfilled the master cylinder.

Good stuff!!

We all be waitin' for the envelope, please! :pop:

..well...I am...

Consider the source
Using a perceived level of knowledge to boost my self worth.
Non impediti ratione cogitationis

bike profile: !clicky!
User avatar
jaydollar
Supporting Member III
Supporting Member III
Posts: 64
Joined: 02:24 pm Mar 09 2008
Country:
Location: dallas texas

Post by jaydollar »

my symptoms were it felt like i was dragging an anchor and my buddy behind me stopped me to say the rear disc was smoking.it was the caliper actually.i cracked the brake line open to let off the pressure and road back to camp with only the front brake.J$
1999 kdx 220
rb carb, rb head pump gas mod. 607 reeds, airbox lid drilled
fmf torque pipe
fmf turbine core Q
trail tech endurance computer
13/49 gear
Post Reply