my rear brakes is vibrating like crazy. its so bad it shakes the bike!!!! i have tried re adjusting them by squeezing the brake at different pressures, and then tighting the bolts. I have also played with the brake pad contact adjustment dial, on the lever exstensivly. Nothing seems to work. I have the 2007 avid codes. can anyone please help me? its driving nuts.
hey. before you go out and spend money to get them bled try this. take your wheel out. take the pads out. take a flat head screw driver, and lightly push on the middle of both the pistons on each side of the brake calliper. what it could be, is the pad sitting crooked in the calliper, then its vibrating against your rotor. try that. and also make sure to line up your rotor right in between the pads! even if it takes you a hour, it will save you trouble later.
but, on the other hand. 3 people i know bought codes'. and they all bled them before they rode them just a shitty bleed from the factory i guess.
i cannot see any relationship between brake shudder and bleeding.
I'd check disc bolts/disc mount, hub play, spoke tension, pad installation, rear axle, and caliper mount to make sure everything is solid with no play.
It seems that it is one of two things, either the pad is not contacting the rotor square(one of the pistons is sitting crooked) or your IS mounts on your frame are not parallel to the rotor. To fix this you will need a disc tab facing tool, most good shops will have one. I know the CPS system is supposed to solve this problem, but it doesn't always work. Also take a quick look at the CPS cup and cone washers and check that they don't have any marks in them from being overtightened (i've seen a few come like that from the factory, just change them if they are marked)