I have a set of 2010 Formula R1 brakes and am having some issues with the front brake. The performance is just not there for getting the front to lock up. I have had these brakes for two seasons and with ease I have always been able to lock the front or rear with just one finger. I put in new pads (sintered), rotors, new lines and bleed the lines a few times now but still no dice (took brakes of my 26 and put on my 29er ) . Pads and rotors were properly seated. The feedback from the lever is there feels great (no air in line).
I have a stubborn piston that is not moving much at all and tonight I will try to get it to loosen up, last week I hit it hard with alcohol and dot 4 fluid but still am not getting one of the pistons to pump with the ease of the other side. Does this sound like I need to replace the piston and the seal for this front caliper perhaps?
Tonight I am going to saturate the piston with silicone lubricant and see if that gets the piston to slide with more ease as the dot fluid alone on the piston is not loosening it up enough.
Would a semi seized piston cause a deterioration in performance I have read many people associating brake noise and rub with seized pistons but not necessarily a performance issue? The front brake is howling when I try to get it to lock up. I got it to lock up a few times last night but only with two fingers and a whole lot of force on the lever. This is not the performance I am used to getting with formula.
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Thread: formula R1 stubborn piston issue