Brake and Clutch master cylinder covers

Gojuu said:

Hi All,

I have some corrosion on the leading edge of the caps on my brake and clutch master cylinders, as pictured:

View attachment 99767 View attachment 99768

Before I am binned from the @Stephen_Spencer Concours D'elegance, has anyone got any ideas on a part number for a replacement cap? I believe they are a somewhat common Brembo item?

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Voodooo said:

That’s from not changing brake fluid enough. Brake fluid absorbs moisture and should be changed at least every two years.

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Gojuu said:

Thanks @Voodooo, I was wondering if there was a reason it had happened.

I don't think a paint or a polish is going to work as, @City Garage is correct, it's actually eaten into the cap and displaced material. And, honestly, if its $20? I probably wouldn't be bothered.

Thanks for the responses. If I get direct swaps for them (aftermarket or otherwise), I'll note back the part numbers etc back here.

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Voodooo said:

Brake fluid eats most paints.
Have you considered black anodized covers?

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Gojuu said:

It's less the fact that it's eaten the paint, and more that its actually eaten the material - you can see that more clearly on the clutch side.

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Voodooo said:

Anodized aluminum is more resistant to brake fluid and anodized aluminum is much harder than paint or powder coated aluminum

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KiwiShane said:

The composition of die cast aluminum is not always suitable for anodizing .....
and why oxidation (corrosion) forms quite quickly after the coating has been eating off with dot 4....

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Voodooo said:

I’m talking about billet aluminum and finished in black anodize.

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Gojuu said:

Hi All,

I have some corrosion on the leading edge of the caps on my brake and clutch master cylinders, as pictured:

View attachment 99767 View attachment 99768

Before I am binned from the @Stephen_Spencer Concours D'elegance, has anyone got any ideas on a part number for a replacement cap? I believe they are a somewhat common Brembo item?

Click to expand...

Stephen_Spencer said:

I feel nervous that that diabolic display of detritous is on the same continent as me! I refuse to ride my bikes until it’s repaired!

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peebee said:

Or you could try polishing them.

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