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Master cylinder for cafe racer bars.

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K2-K6:
I think Laverda 120 is correct,  the originals apoear anodised.

It's just dyed as far as I know, most black colouring isn't true black but just black enough to convince our eyes that no other colour is present.

https://www.caswelleurope.co.uk/anodizing-dyes/ shows a dye suppliers to anodising industry for interest.

As the original fades it will show some of the component incorporated in the dye,  usually elements of blue,  but often red or yellow that can shows as a golden hint when faded.  Depends which component is the most stable over time as to which colour is left.  It's a bit like those pictures you'd see in hair stylists windows that have faded usually to bright cyan when left too long.

Laverda Dave:
I had to laugh at your last comment Nigel. I remember going into a barbers in my teens, pointing to a photo on the wall of a particular style and saying 'Can I have mine like that'? The resulting cut looked nothing like the photo!!!
Back to the caliper, yes it gave off a metallic look so probably faded over 40 years despite not being in sunlight but under a rubber boot.

billdn:
So for late reply, thanks for the confirmation that it should be ok as is!

Rob62:
Ensuring the rubber baffle / membrane is fitted into the master cyl should help to keep the fluid in the right area and prevent it from sloshing about.

Tomb:

--- Quote from: Rob62 on September 03, 2019, 01:13:40 PM ---Ensuring the rubber baffle / membrane is fitted into the master cyl should help to keep the fluid in the right area and prevent it from sloshing about.


--- End quote ---

Yep, mine works ok

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