Author Topic: Gross brake master piston  (Read 931 times)

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Offline mono

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Gross brake master piston
« on: October 14, 2013, 04:26:27 PM »
After soaking for 2 weeks in evaporust, I was able to remove the circlip from the master cylinder, but it was still so corroded I had to bang out the piston.  The piston was horrible, but the inside bore of the MC is nice and shiny and smooth. :) 

Offline MoMo

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Re: Gross brake master piston
« Reply #1 on: October 14, 2013, 04:33:33 PM »
Check DSS for a replacement MC-not much more than a rebuild kit...Larry

Offline mono

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Re: Gross brake master piston
« Reply #2 on: October 14, 2013, 04:34:53 PM »
Why?  I like this one lol. It's fine now!   Just needs a rebuild.

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Offline Mo

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Re: Gross brake master piston
« Reply #3 on: October 14, 2013, 06:33:08 PM »
I've been told that even a rebuilt MC may still not function as well as a new one  :o I'm sure that 90% of that is based on the quality of the rebuild.

Offline MoMo

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Re: Gross brake master piston
« Reply #4 on: October 14, 2013, 06:36:12 PM »
the entire assembly with lever is $45

Offline 754

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Re: Gross brake master piston
« Reply #5 on: October 14, 2013, 07:42:12 PM »
 Does it look identical ?
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Offline MoMo

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Re: Gross brake master piston
« Reply #6 on: October 14, 2013, 07:56:25 PM »

Offline mono

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Re: Gross brake master piston
« Reply #7 on: October 15, 2013, 05:53:55 AM »
I've been told that even a rebuilt MC may still not function as well as a new one  :o I'm sure that 90% of that is based on the quality of the rebuild.

rebuilt my crudded-up 550 MC and it's been problem-free for 2 years.  the only reason it would be "less functional" is if the bore was in bad shape/scratched up.  they aren't very complicated machines.

-------------
also, not liking the DSS remake as much, although it is good to know that a full replacement MC is available at that price (that's a good price!)

Offline Mo

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Re: Gross brake master piston
« Reply #8 on: October 15, 2013, 08:01:24 AM »
I've been told that even a rebuilt MC may still not function as well as a new one  :o I'm sure that 90% of that is based on the quality of the rebuild.

rebuilt my crudded-up 550 MC and it's been problem-free for 2 years.  the only reason it would be "less functional" is if the bore was in bad shape/scratched up.  they aren't very complicated machines.

-------------
also, not liking the DSS remake as much, although it is good to know that a full replacement MC is available at that price (that's a good price!)

Yeah, that's why I added that last bit there. YMMV, as always. I used a rebuilt one, because I am a cheap ass.

Offline bjbuchanan

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Re: Gross brake master piston
« Reply #9 on: October 15, 2013, 11:58:01 AM »
Buying rebuilt MC's is usually where you have the trouble. You don't know how well they were cleaned, checked for functionality and what went in the thing.

Sometimes return ports aren't cleaned and it won't release properly, other times the reubilder is just a clown
The dirty girl-1976 cb750k, Ebay 836, Tracy bodykit
Round top carbs w/ 38 pilots, middle needle position, airscrew 7/8ths out, 122 main jet
Stock airbox w/ drop in K&N, Hooker 4-1

Don't trust me alone with a claw hammer and some pliers

Offline mono

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Re: Gross brake master piston
« Reply #10 on: October 15, 2013, 12:57:39 PM »
other times the reubilder is just a clown

i fu*king hate clowns.

Offline bjbuchanan

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Re: Gross brake master piston
« Reply #11 on: October 15, 2013, 02:43:19 PM »
other times the reubilder is just a clown

i fu*king hate clowns.

Exactly ;)
The dirty girl-1976 cb750k, Ebay 836, Tracy bodykit
Round top carbs w/ 38 pilots, middle needle position, airscrew 7/8ths out, 122 main jet
Stock airbox w/ drop in K&N, Hooker 4-1

Don't trust me alone with a claw hammer and some pliers