The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: anaxolotl on May 17, 2012, 07:40:46 PM
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i noticed that, as the bike was warming up this morning, the tail light was on. after a bit, i noticed that there was a mm or two of "looseness" in the brake lever... it wasn't held all the way in by tention on the cable. if i give it a slight push (out) it returns to its seated position and the tail light goes out.
on the commute to work, i didn't notice any weirdness or sponginess in the front brake. any ideas how i can fix this?
Thanks in advance all.
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It sounds like the master cylinder piston didn't come out all the way and push the brake lever far enough, to let the front brake switch go to the off postion .
About the only thing I can think of, is there may be corrosion in the master cylinder bore, causing the piston to hang up .
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yep, i think that is it... any easy fix?
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Nothing real quick and simple .
The master cylinder needs to come out and be disassembled, if the corrosion is not too bad, you clean up the bore with a scotchbrtite, type material, or a very fine sandpaper/emery cloth .
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ugh. so, is this a sign that i shouldn't be riding it until the master cylinder is fixed up?
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That's kinda your call, but if your brake light is staying on all the time, you increase your risk of being rear ended by a vehicle behind you .
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okay.. as long as it isn't a sign my brakes are about to fail. i spent today driving with one finger extended and that seems to keep the brake light out. I'll give it a look this weekend.
Thanks again