04 pitbull rear brake

[Badazz]

So I changed my brake pads and rebuilt the Caliper and it is still sticking on me. I'm not sure what to try next.

 

[HMAN]

Were the pistons pretty gummed up, did you notice any scoring in the cylinder or on the pistons?

 

[Badazz]

Disregard I have found the problem the rotor is pretty warped

 

[Badazz]

But no the pistons weren't bad at all. And I cleaned everything pretty well before reinstalling

 

[HMAN]

Yep, a warped rotor will give ya fits. Glad ya got it figured out.

 

[Sven]

... and it is still sticking on me. I'm not sure what to try next.

If that's the case, then you'd be pumping the lever. Say you let go of the brake and that was the deepest point the piston came out. The come-around, the high point would push the piston back in = No drag.

Quad-ring sits in a groove and a crystal buildup is growing between groove and rubber. That's the tight piston not moving back.

Quad sits statically squared ( I I ). Lever pushes piston, quad moves like this ( / / ). You let go of the lever, quad has memory to go back to square ( I I ) and pulls the piston back when you release the lever.

Here is what's next: if I were chasing a dirty quad groove in the caliper, and/or a plugged up master return hole...
1. Tire is off the ground, toothpick is pushed up against the disc and resting on the outside of the caliper body.
2. I start at any point so the come-around will either push the lightly held toothpick back and as it keeps moving away from the pushed point is that gap. That or look from the front and eyeball it without the pinpoint and guess where the high spot sits.
3. I found the peak high spot being anal about degree points and mark a line with a sharpie. Pull the brake once and let go. Piston should retract from that highest point.
4. I watch the line as i spin it slowly on its own. It stops at the line or you hear it drag = Still dirty is my square groove.

Signed,
Only the come-around knows for sure.

 

[john sachs]

Not butchery. If it's NOT a floating rotor: Find the high spot, and using a 2X4 and a hammer , finesse that area to run true with the rest of the rotor. I've fixed many Harley rotors like that.
John

 

[knothead]

I totally agree with John....i have fixed several like that myself...me having a lathe helps so i can see the run out easier and indicate it in pretty dang true