mtbr member since 1996
I have some of the original B4 brakes that Thorsten was selling when he first started distributing Formula. I've learned he is no longer the distributor, so I've come here. I frankly don't know much about servicing these brakes because, well, they never needed it. Last week I went to ride and found my front brake had leaked (presumably...there was a little bit of oil inside where the rubber bag thing is in the lever) and had zero pressure in it. I did not see any visible leaking, but the oil level was low enough that I got no braking from them (thank goodness Texas is flat). The previous ride...several weeks ago...I had no problems. I have no idea how a brake can go from good to bad sitting there, but it did. I believe I have the bleed kit (like I said, I installed them and rode them for 4 years and never touched them). What else will I need? What might be the problem? I don't see any broken parts anywhere. Any help is appreciated.