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Brake still dragging.

 
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Author Message
Pete

External


Since: Sep 02, 2006
Posts: 13



(Msg. 1) Posted: Sat Aug 25, 2007 8:13 pm
Post subject: Brake still dragging.
Archived from groups: alt>motorcycles>yamaha (more info?)

Ok. After I found the contaminated fluid and the crud coming out of the
caliper
I opted to just replace the caliper since it didn't want to retract and was
dragging
on the rotor.

Now I put the new caliper on , bled it real good with a vacuum bleeder,
pumped up
the pedal and everything appeared ok. Took it for a test ride, rear brake
didn't feel
right, I stopped, touched the rotor with my hand (glove on) and sum bitch
red hot.
Now I am a little confused here and slightly pissed. Is there something I
missed
in this process? I used the right fluid Dot4. Is there a certain procedure
for doing
dual caliper rear brakes that I might not be aware of?

 >> Stay informed about: Brake still dragging. 
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Albrecht via MotorcycleKB

External


Since: Jun 07, 2007
Posts: 414



(Msg. 2) Posted: Sat Aug 25, 2007 10:05 pm
Post subject: Re: Brake still dragging. [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Pete wrote:

>Now I put the new caliper on , bled it real good with a vacuum bleeder,
>pumped up
>the pedal and everything appeared ok. Took it for a test ride, rear brake
>didn't feel
>right, I stopped, touched the rotor with my hand (glove on) and sum bitch
>red hot.
> Now I am a little confused here and slightly pissed. Is there something I
>missed
>in this process? I used the right fluid Dot4. Is there a certain procedure
>for doing
>dual caliper rear brakes that I might not be aware of?

http://houseofmotorcycles.bikebandit.com/partsbandit/ShowSchematic.asp...eptId=2


There's not much to go wrong inside a brake caliper except for rust and
rubber debris accumulation. Did you bleed both sides of the caliper? Is there
any place in the brake hose where an air bubble could get trapped?

Did you install new brake pads? New pads need about ten hard stops to bed
them in. Then the pedal doesn't feel so spongy.

Hot disk?

My FZR1000 has a similar rigidly mounted dual piston caliber and so does my
GS1100. I have noticed that both rear brake disks tend to run hot and I
suspect it has to do with rigid mounting and maybe a thicker disk.

Rear pads only last 10K miles for me, other riders claim they never touch the
rear brake and pads last 60K miles for them.

Front disks tend to wobble a bit laterally and front forks are not absolutely
rigid.

This knocks the brake pads back from the disk so they don't drag. A
motorcycle with draggy front brakes doesn't steer well, it wants to stand up
under braking.

--
Message posted via http://www.motorcyclekb.com

 >> Stay informed about: Brake still dragging. 
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Pete

External


Since: Sep 02, 2006
Posts: 13



(Msg. 3) Posted: Sat Aug 25, 2007 10:26 pm
Post subject: Re: Brake still dragging. [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"Albrecht via MotorcycleKB.com" <u33665@uwe> wrote in message
news:773de3496087c@uwe...
> Pete wrote:
>
>>Now I put the new caliper on , bled it real good with a vacuum bleeder,
>>pumped up
>>the pedal and everything appeared ok. Took it for a test ride, rear brake
>>didn't feel
>>right, I stopped, touched the rotor with my hand (glove on) and sum bitch
>>red hot.
>> Now I am a little confused here and slightly pissed. Is there something I
>>missed
>>in this process? I used the right fluid Dot4. Is there a certain procedure
>>for doing
>>dual caliper rear brakes that I might not be aware of?
>
> http://houseofmotorcycles.bikebandit.com/partsbandit/ShowSchematic.asp...eptId=2
>
>
> There's not much to go wrong inside a brake caliper except for rust and
> rubber debris accumulation. Did you bleed both sides of the caliper?

Yes. I started with the inside piston ,then the outside, then repeated both.
Then i pumped the lever and watched the pads and they were retracting
off the rotor. So i went for a cruise and the brake after a little usage
felt wrong,
so i felt the rotor and it was hot real hot.


Is there
> any place in the brake hose where an air bubble could get trapped?

I'll have to double check on that.
>
> Did you install new brake pads?

Yes.

New pads need about ten hard stops to bed
> them in. Then the pedal doesn't feel so spongy.
>
> Hot disk?
>
> My FZR1000 has a similar rigidly mounted dual piston caliber and so does
> my
> GS1100. I have noticed that both rear brake disks tend to run hot and I
> suspect it has to do with rigid mounting and maybe a thicker disk.
>
> Rear pads only last 10K miles for me, other riders claim they never touch
> the
> rear brake and pads last 60K miles for them.
>
> Front disks tend to wobble a bit laterally and front forks are not
> absolutely
> rigid.
>
> This knocks the brake pads back from the disk so they don't drag. A
> motorcycle with draggy front brakes doesn't steer well, it wants to stand
> up
> under braking.
>
> --
> Message posted via http://www.motorcyclekb.com
>
 >> Stay informed about: Brake still dragging. 
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