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Author Topic: brake lever play --> tail light on  (Read 1010 times)

anaxolotl

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brake lever play --> tail light on
« on: May 17, 2012, 07:40:46 PM »
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.

« Last Edit: May 17, 2012, 07:41:55 PM by anaxolotl »
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Offline Bob_Roller

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Re: brake lever play --> tail light on
« Reply #1 on: May 17, 2012, 08:09:26 PM »
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 .
« Last Edit: May 17, 2012, 08:12:51 PM by Bob_Roller »
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'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

anaxolotl

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Re: brake lever play --> tail light on
« Reply #2 on: May 17, 2012, 08:10:42 PM »
yep, i think that is it... any easy fix?
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Offline Bob_Roller

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Re: brake lever play --> tail light on
« Reply #3 on: May 17, 2012, 08:26:41 PM »
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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'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

anaxolotl

  • Guest
Re: brake lever play --> tail light on
« Reply #4 on: May 17, 2012, 08:31:05 PM »
ugh.  so, is this a sign that i shouldn't be riding it until the master cylinder is fixed up?
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Offline Bob_Roller

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Re: brake lever play --> tail light on
« Reply #5 on: May 17, 2012, 08:34:53 PM »
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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'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

anaxolotl

  • Guest
Re: brake lever play --> tail light on
« Reply #6 on: May 17, 2012, 09:23:50 PM »
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
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