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12425 - Established June, 2013 - all GRiSO, all the time...
 
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 Help replacing rear brake pedal

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lcjohnny
rick pope
Pete Roper
Oz1200Guzzi
gselvo
Papa Lazarou
tvboy
beetle
Mandrake
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gselvo
Montanarolo
Montanarolo
gselvo

Posts : 19
Join date : 2016-07-07

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PostSubject: Re: Help replacing rear brake pedal   Help replacing rear brake pedal - Page 2 Icon_minitime1Sun Dec 27, 2020 4:21 pm

I've been riding the bike with the bent liver for quite a while I think, maybe a couple of years. I don't think that the bolt holding it on is going to be a problem. Also to the extent that the lever was injured due to falling over or hitting something, the annealing process actually fixes that injury in the sense that it realigns the molecules in the aluminum the way they were supposed to be at the outset. I definitely will be watching for a broken rear brake lever though and hope it doesn't happen
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Steak
L'Innominato
L'Innominato
Steak

Posts : 2920
Join date : 2013-05-28
Age : 56

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PostSubject: Re: Help replacing rear brake pedal   Help replacing rear brake pedal - Page 2 Icon_minitime1Sun Jan 03, 2021 11:26 am

Well, if I were you, I'd still obtain a spare and toss it in your tool bag. I'm pretty sure that it is a sintered metal part and designed to be a breakaway to save the much more expensive pork chop...

When it does snap on you, it'll likely be at an inconvenient time and place. Besides, it's a cheap part.

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2012 MOTO GUZZI GRiSO 1200SE

2013 MOTO GUZZI STELVIO 1200NTX - Orange Blossom Special
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RedMogAndy
Carlotto
Carlotto
RedMogAndy

Posts : 27
Join date : 2019-09-12
Age : 61

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PostSubject: Re: Help replacing rear brake pedal   Help replacing rear brake pedal - Page 2 Icon_minitime1Mon Jan 04, 2021 4:00 am

Yes, definitely change that bolt - I had the one on the shifter side go (it's the same part) leaving the inexpensive steel remains in the rather expensive but thankfully available pork chop.
I think the bending of the lever must weaken the bolt and it is then just a question of time before it breaks off.

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lcjohnny
GRiSO Capo
GRiSO Capo
lcjohnny

Posts : 470
Join date : 2016-01-25
Age : 66

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PostSubject: Re: Help replacing rear brake pedal   Help replacing rear brake pedal - Page 2 Icon_minitime1Mon Jun 14, 2021 11:31 am

A friend borrowed the bike and got squeezed off a single track road (i can't comment as I did not see it) the brake lever took a 45º twist when the bike fell over.  Sad

I took the lever up to 300ºc (using an IR thermometer) and let it cool slowly to anneal.
This was well above the temperature that soap blackened (250ºc).

Held it in the vice and bent it straight between two adjustable spanners to localise the bend. It bent straight with very little force  (but remember to put the toe peg back in before bending it so that they eye in the lever does not deform (Dont ask pale ).

The bolt also needed a gently tonk with a copper hammer and now all is well.
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paulbrice
GRiSO Capo
GRiSO Capo
paulbrice

Posts : 1140
Join date : 2015-01-04
Age : 60

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PostSubject: Re: Help replacing rear brake pedal   Help replacing rear brake pedal - Page 2 Icon_minitime1Mon Jun 14, 2021 12:15 pm

ahh the old copper hammer....like all things 'copper' you can never find one when you need one Wink

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