Rear Brake problem

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Aug 20, 2012 | 08:46 AM

#11

CurtisO

Tourer

Joined: Apr 2010

Posts: 309

Likes: 0

From: Pearl River, LA

Been there, done that. MASTER CYLINDER BAD.

Aug 20, 2012 | 08:47 AM

#12

vzts4q

Road Master

Joined: Apr 2008

Posts: 983

Likes: 4

From: Indiana

Quote:

Originally Posted by stuart1270

Master cylinder Master cylinder Master cylinder

Absolutely

Aug 20, 2012 | 11:04 AM

#13

joehyp

Thread Starter

2nd Gear

Joined: Aug 2012

Posts: 6

Likes: 0

From: ma.

master cylinder

Quote:

Originally Posted by stuart1270

Master cylinder Master cylinder Master cylinder

OK what is my best course of action , a new Master Cylinder or a rebuild kit??

Aug 20, 2012 | 11:42 AM

#14

TWIN CAM 96

Outstanding HDF Member

Joined: Apr 2011

Posts: 2,555

Likes: 6

From: East of the USS Midway

Did you use the proper Dot fluid for your bikes system?

Aug 20, 2012 | 12:58 PM

#15

joehyp

Thread Starter

2nd Gear

Joined: Aug 2012

Posts: 6

Likes: 0

From: ma.

warped rotor

Quote:

Originally Posted by Fishrrman

The rotor may be warped.

Perhaps not enough so that you feel it pulsing, but perhaps enough to push the pads and calipers further into the caliper housings than is normal. (Normally, the pads are all-but touching the surface of the rotors, and move very little when the brake is applied.)

What this means is that the "first push" of the pedal has to move the calipers and pads before building up the required pressure -against- the rotor to make the brake effective. Pumping the brake overcomes this, and then the brakes -seem- to work normally.

But -- release the brake, and the wavy rotor again pushes the pads/calipers further back into the housing, and the next time you go to apply the rear brake -- same thing all over again.

Is this what you're experiencing?

I had the same problem on my '00 Road Glide. Replacing the rear rotor solved the problem immediately.

YEP, I have a warped rotor ... I jacked up the bike and I hit press on the pedal and all is good and then I rotate the wheel and as I do I see a gap of 1/8"-3/16th" and then press the pedal and it goes to the end of it's travel (hitting floor board bracket ).. The warped rotor is pushing the brake pads outward and then when I want to use the brakes I have to pump the brakes.... Thanks for the help !!!!!!!
One more thing what should I get for new rotors floating, aftermarket, etc.

Aug 20, 2012 | 01:13 PM

#16

soft 02

Seasoned HDF Member

Joined: Mar 2007

Posts: 66,948

Likes: 4,573

From: TOAK western branch

Quote:

Originally Posted by joehyp

That is what is happening , will take a look at rotor , BUT it would have to be very warped as I can push the pedal all the way to the floorboard bracket. Thanks for the reply ,I'll take a look ..

We win! What's the prize?

Aug 21, 2012 | 12:14 AM

#17

Fishrrman

Road Warrior

Joined: Aug 2011

Posts: 1,510

Likes: 23

From: Connecticut

"YEP, I have a warped rotor .."

Yep -- what did I tell ya?

You could have spent big bucks rebuilding the master cylinder, etc. -- all for naught.

Aug 27, 2012 | 11:26 AM

#18

JoeMayhem

1st Gear

Joined: Jun 2012

Posts: 5

Likes: 0

From: Orange County, Ca

similar problem

so i got this same thing, in the middle of a ride my rear brake went all the way to the floor. my buddy who is a HD mechanic looked it over and after throwing on new pads (because mine were done) says its the rear master, i looked online for a rebuild kit and there are two sizes 3/4 and 5/8in bore

which one is the right kit to buy

2006 FLHX Street Glide