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Author Topic: Bent rear brake arm  (Read 1736 times)

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Offline qw3rtie

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Bent rear brake arm
« on: March 01, 2012, 02:09:31 PM »
Hi everybody, i am the new owner of a 1975 cb550f. Its in decent condition. ran when i bought it though the battery is dead now.


My biggest problem though is the rear brake. After i bought it and brought it home i wanted to ride it. So im pulling out of my driveway which is downhill so i start braking a little and feel this weird resistance then hear a very unpleasant sound. i look down and see that the rear brake rod which is connected to the pivot attached to the brake pedal snapped off because the PO had forgotten to put a nut on the rear brake stopper arm when reassembling the bike



also my parts manual is a little blurry, can anyone clarify that the hex nut size is 9mm?

as a result the rear brake rod looks like this



and the rear brake arm looks like this




i have since ordered a new brake pivot and rear brake rod but im wondering if its possible to fix the rear brake arm without making it weaker. or if i should, if i can find one, buy a used one. any help is appreciated. Thanks
« Last Edit: March 01, 2012, 04:09:40 PM by qw3rtie »
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Offline qw3rtie

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Re: Bent rear arm brake
« Reply #1 on: March 01, 2012, 02:41:13 PM »
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Offline Don R

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Re: Bent rear arm brake
« Reply #2 on: March 01, 2012, 02:47:17 PM »
 It might be good to do a nut and bolt check if you haven't already. It's scary to trust someone else with your life.
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Offline qw3rtie

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Re: Bent rear arm brake
« Reply #3 on: March 01, 2012, 02:55:13 PM »
Quote from: Don R on March 01, 2012, 02:47:17 PM
It might be good to do a nut and bolt check if you haven't already. It's scary to trust someone else with your life.

thank you i will. im new to bikes and have pretty much no mechanical experience so any advice is great.
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Offline LesterPiglet

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Re: Bent rear brake arm
« Reply #4 on: March 01, 2012, 05:17:46 PM »
Being cheap as I am I would hit that with a hammer and straighten it. Gonna take a lotta force to break that.
I also made my own brake rod from a brass bar. It ain't gonna break.
« Last Edit: March 01, 2012, 05:19:34 PM by LesterPiglet »
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Offline qw3rtie

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Re: Bent rear brake arm
« Reply #5 on: March 02, 2012, 07:52:44 AM »
yeah i tried a hammer but was getting nervous about hitting it too hard though youre right, its steel. it can take a beating. and even if i break it its not like im losing a working part
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Offline srbakker

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Re: Bent rear brake arm
« Reply #6 on: March 02, 2012, 08:07:15 PM »
Find a spare in a local junkyard or Fleabay - not sure I'd trust that thing.
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