Brake and Clutch master cylinder covers

Gojuu · Sep 29, 2022

Hi All,

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

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?

City Garage · Sep 29, 2022

Try 110430860 brembo

ntst8 · Sep 29, 2022

Rub them down and respray?

City Garage · Sep 29, 2022

That corrosion is in the Alloy

Gojuu- I meant to ask. Do you have parts house close by? whatever they call them there. They have many aftermarket covers available for those. KTM and others use that same size. I can walk into cycle gear or other places here and they will have them

Voodooo · Sep 29, 2022

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?

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

KiwiShane · Sep 29, 2022

Flat file all the letters off and polish the covers...

Gojuu · Sep 29, 2022

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

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.

Voodooo · Sep 29, 2022

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.

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

Gojuu · Sep 29, 2022

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

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.

Voodooo · Sep 29, 2022

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.

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

KiwiShane · Sep 29, 2022

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

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....

Voodooo · Sep 29, 2022

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....

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

Rizoma Front Brake Reservoir Cap Yamaha - RevZilla

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Reservoir Caps by Oberon Performance

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Rizoma Front Brake Fluid Reservoir Cap

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KiwiShane · Sep 29, 2022

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

Rizoma Front Brake Reservoir Cap Yamaha - RevZilla

Shop RevZilla for your Rizoma Front Brake Reservoir Cap Yamaha today! Free Shipping, Lowest Price Guaranteed & Top of the Line Expert Service.

www.revzilla.com

Reservoir Caps by Oberon Performance

motorcycle parts and accessories for race and custom motorbikes by oberon performance uk designed and manufactured

www.oberon-performance.co.uk

Rizoma Front Brake Fluid Reservoir Cap

Rizoma TP049B Front brake fluid reservoir cap ...

www.motostorm.it

My comment was intended for Gojuu
Yes billet is sweet

Stephen_Spencer · Sep 30, 2022

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?

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

!

peebee · Sep 30, 2022

Or you could try polishing them.

Gojuu · Sep 30, 2022

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!

@Stephen_Spencer if you tell me which photoshop filter you use, I’ll take another photo and it should be fine……

Voodooo · Sep 30, 2022

peebee said:
Or you could try polishing them.

Those tank stickers need to go

KiwiShane · Sep 30, 2022

So does the cast lettering on the reservoir-caps...like this older brembo unit

Brake and Clutch master cylinder covers

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