beta rider Posted April 5, 2007 Report Share Posted April 5, 2007 Help needed! I disconnected my rear brake master cylinder (the part connected to the frame - not the reservior) to fit a pair of new carbon frame gaurds. To be honest I'm a bit disappointed with the gaurds - the master cylinder holes had to be filed out to make it fit as they were out of line etc and the air box cover certainly does'nt fit as it moves the rubber air box to carb hose out of line. On reassembling the bike with the frame guards in place the master cylinder appears slightly out of line compared to the brake pedal piston. I've had a good look and this appears to be a manufacturing tolerance in the cylinder and has probably always been there. After bleeding the rear brake I have lost the free play in the first 5 mm of the pedals movement. The pedal is slack and has simply dropped down the 5mm, although it can be lifted up by hand. Also the pedal is slow to return after the brake is depressed. Having said all that the effectiveness of the brake is still pretty good. Immediately after the installation I depressed the brake pedal and it completely failed to return to position. The piston in the master cylinder appearred to be stuck and the only way I could free it was to force the rear brake pads apart. Any ideas how I return the brake pedal to its normal position and return its movement to what it was before? I've tried bleeding the brake until I'm pulling my hair out and I dont think its air in the system. Thanks. Quote Link to comment Share on other sites More sharing options...
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