Brake caliper pistons

Well, I have been putting this off, but I FINALLY have 2 days off, so I am going to work on this today. Hofefully cleaning out my calipers will get rid of the awful brake drag I have with the front brakes. I am going to re-use the seals, just clean them up the best I can.

I helped a friend of mine change out his disc brake's to cross drilled/sloted and stainless steel brake lines on his car and he had a bottle of brake fluid left over that he gave me.

http://www.intakeone.com/brake_systems/MotulRBF600.html

Is this good stuff? That site is asking $20 for one bottle, so it better be. Also, would 1 1/2 liter bottle be enough for the front brakes?

This thread from this forum said something about working the pistons back and forth after you get everything put back together and something about permitex caliper piston grease - made a lot of sence.
http://www.ccsforum.com/index.php?topic=17325.msg145295

1. Brake drag:

That model R6 has always been notorious for front brake drag. I spent hours getting that system to work halfway decent. If your willing to spend the time, here are some things you can do.

First take the pistons out and polish them.

When you re-install, use permitex caliper piston grease in the grove of the seal and spread on the piston face as well.

After you've got everthing back together leave the calipers off and work the pistons back and forth (this is easier with the pads installed, make sure to put something in-between the pads of the caliper you are NOT working on to keep the pistons from popping all the way out) by pumping them out with the lever and then pushing them back in. After a while you should start to see them retract when you release the lever, now your brake drag should be minimal.

remove the pads and wipe off any excess piston grease to avoid attracting dust/dirt.

In the future - Do not use brake cleaner to clean the calipers and pistons as it dries out the seals. Use something like WD-40 or some guys like simple green.

Brake caliper pistons

YamRZ350

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