Hi - my new Spec Enduro's back brake (Avid

I think you may have a cracked brake rotor. Please take it to a reputable shop where they repair brakes. Fortunately, brake rotors are cheap these days.

If you already overhauled the caliper, I would overhaul the lever as well. In fact, I usually overhaul the entire system instead of one or the other. As for the chattering sound, it sounds like the rotor is catching the edge of one of the brake pads. Check to see if the pads are retracting fully or see if the pads are loose in the caliper.

I am assuming you are looking for the clamp portion of the brake lever.

If you do a google search for the following you can find several options on-line, or go into your local bike shop and have them order for you, they may even have in stock if they do alot of work with Hydraulic brakes.

Search: Avid Juicy Brake Lever Clamp or Avid Hydraulic lever clamp.

Here is a link as an example of a result.

Sounds like you need to strip down the caliper and clean it out im afraid. How about trying a LBS?

(usually its caused by a dry seal and the piston has to be forced out by putting an air line onto the caliper bleed nipple and blasting air into it to force it out - *be careful if trying this!!**)

It is a lose bolt somewhere, OR somebody has touched your rotor with their hands OR there is oil in the pads.

Check ALL your bolts for correct torque, buy new pads and Rubbing Alcohol and install them AFTER you clean off the rotor and your hands with the Rubbing Alcohol. TRY not to touch the rotor or the pads with your hands.

They do drag by default ... mostly ...a little bit ... that is why they dont sit square with the rotor but rather a few degrees to the right or left.

pads and rotors wear together. if you dont replace the rotor along with the pads, the pads wont have complete contact the rotor and will not have the stopping power they should.

use a flat screw driver and push the pads back in on the calliper. Be gentile though.

take the wheel out insert a very large flat bladed screw driver up into where the rotor would sit and lever the pads back in very gently with the screw driver.

if this does not shift them they will need re-built by a Sram bike shop.

try these links:

http://forums.mtbr.com/showthread.php?t=464735

http://www.sram.com/en/service/avid/view.php?catID=1&subcatID=1