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Master cylinder diaphragm

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Replace it
Yes
100%
 100%  [ 6 ]
No
0%
 0%  [ 0 ]
Total Votes : 6

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Ice Burger
Nova Slayer



Joined: 21 Apr 2019
Karma :
PostPosted: 10:27 - 14 Jun 2022    Post subject: Master cylinder diaphragm Reply with quote
Recently bought some Chinese brake levers and noticed there's a hole in one of the diaphragms.

Any idea if this should definitely be replaced for one completely intact of is it fine?

My fear is this will let air into the reservoir and spoil the fluid.

https://drive.google.com/drive/folders/1kpMwRGHXDgl17tl6TAan_Np3dzFRwSxv
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P.
Red Rocket



Joined: 14 Feb 2008
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PostPosted: 10:56 - 14 Jun 2022    Post subject: Reply with quote
Would I trust chinese manufactured (I am presuming pretty cheap too...) braking components as my primary stopping item.

Probably not.
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Fat Angry Scotsman
World Chat Champion



Joined: 12 Jan 2021
Karma :
PostPosted: 11:06 - 14 Jun 2022    Post subject: Reply with quote
Paddy. wrote:
Would I trust chinese manufactured (I am presuming pretty cheap too...) braking components as my primary stopping item.

Probably not.


I wouldn't put money on the diaphragm of your Aprilia RS125 being made in Italy or the diaphragm on your Suzuki GSXR1000 being made in Japan. I'd put money on both coming from a Chinese factory Laughing
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Easy-X
Super Spammer



Joined: 08 Mar 2019
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PostPosted: 11:52 - 14 Jun 2022    Post subject: Reply with quote
Throw it in the bin, that hole's clearly a manufacturing defect.

BTW, better to share photos anonymously through sites like imgur
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P.
Red Rocket



Joined: 14 Feb 2008
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PostPosted: 12:07 - 14 Jun 2022    Post subject: Reply with quote
Fat Angry Scotsman wrote:
I wouldn't put money on the diaphragm of your Aprilia RS125 being made in Italy or the diaphragm on your Suzuki GSXR1000 being made in Japan. I'd put money on both coming from a Chinese factory Laughing


But at least it passed through some QC...

I don't understand why anyone would trust any chinese parts bin item on their brakes. Sure, it may be fine, but I am not a gambling man. I mean parts directly ordered from the cheapest possible vendor on ebay or similar.
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Fat Angry Scotsman
World Chat Champion



Joined: 12 Jan 2021
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PostPosted: 12:14 - 14 Jun 2022    Post subject: Reply with quote
Paddy. wrote:
I mean parts directly ordered from the cheapest possible vendor on ebay or similar.


To be honest, I am in the same thought camp. I would have just bought an OEM replacement from Fowlers for the diaphragm, it's not going to cost more than £15 Laughing
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Old Thread Alert!

The last post was made 1 year, 314 days ago. Instead of replying here, would creating a new thread be more useful?
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