StuD Posted August 17, 2009 Share #1 Posted August 17, 2009 Just spent an all nighter on a friends 85VR. The equalizer for the front & rear break has been removed,the 2 front breaks opperate from the front resavour. The back break opperates from the foot pedal. PROBLEM is no rear break... 1 resivour is full of fluid 2 caliper has been blead till only fluid/no air 3 pistons are not ceased 4 rotor cleaned with break cleaner 5 lots of pressure at peddle while bleeding 6 new pads Dont know what else to look at, any ideas? :canada: Link to comment Share on other sites More sharing options...
mrwhitebikes Posted August 17, 2009 Share #2 Posted August 17, 2009 Im not an expert but it sounds like the calipers are binding, mabey you pushed them too far in when you put on the new pads, ? hope it helps. Mike Link to comment Share on other sites More sharing options...
Condor Posted August 17, 2009 Share #3 Posted August 17, 2009 (edited) That happens. If you compressed the pistons before bleeding it takes a while before the caliper gets 'pumped up' again. Bleed the front brake until you get pedal, and then rebleed the rear caliper and pump the 'H' out of the pedal. Hopefully you'll get pedal again. Once you do get pedal, bleed the lines again. The other possibility is the portioning valve is plugged. It doesn't take much crud to keep fluid from getting to the back caliper. Gotta love those speed bleeders.... Gotta remember to read all posts 3 times before offering advice.... Edited August 20, 2009 by Condor Link to comment Share on other sites More sharing options...
skydoc_17 Posted August 17, 2009 Share #4 Posted August 17, 2009 When you delink the brakes and remove the proportioning valve, an air bubble gets trapped in the top of the rear master cylinder. The fix is to move the rear brake line to the spot where the left front brake line used to be connected. (see pic) This will allow the air bubble to escape and all will be well. The downside is that you are going to need a longer rear brake line with an angle on it like the one in the pic. I sell this line for $45.00 plus shipping. It is a stainless steel line and top quality. The other thing I wanted to mention is that if you didn't rebuild the rear master cylinder you are going to have a bear of a time pushing fluid to the rear caliper. I used speed bleeders and a vacuum pump to speed up the bleeding process. I have rebuilt master cylinders for sale as well. If you try to rebuild the rear master yourself, invest in a GOOD pair of snap ring pliers, you'll need them! If you have more questions, or need parts, PM me. Good luck with your project, Earl Link to comment Share on other sites More sharing options...
StuD Posted August 19, 2009 Author Share #5 Posted August 19, 2009 Skydoc 17 you have a PM:canada::canada: Link to comment Share on other sites More sharing options...
StuD Posted August 20, 2009 Author Share #6 Posted August 20, 2009 Skydoc 17........Earl you got mail :canada: Link to comment Share on other sites More sharing options...
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