clutch master cylinder changes color

M

MotoV

Hero member
I am rebuilding a clutch master cylinder and put it in my vibratory cleaner - it went in black and came out gold...amazing device,  this is a known "factory" item so it looks like they painted this one...badly...
I am used to Laverda paint being a pain to remove. I will probably repaint it but was curious to see if others have found the same "issue".
 
:o :o Can I send you some "gold bar" shaped lead, to be put in this amazing machine?
May not be worth the postage cost on the way there, but on the way back............ :D :D :D :D :D
 
Have found some parts changing color (I think they were zinc-plated?!? The bracket that connects the 3 carbs f.e.), but never did try painted parts in the ultrasonic cleaner yet...
 
As in gold anodised, or gold discolouration?
If anodised then that is a desireable part!  :D
 
gold zinc plated changed into silver...  :o

not sure what the solvent is called actually, I am off home today but can look it up tonight. it is specially designed for alloy parts though (have used it with great success on all other parts of the Dell'Orto Carbs...), so maybe no wonder it had an impact on the zinc-plating...?!?
 
Gold anodized...or maybe some other plating like gold zinc. I used a small amount of Simple Green as the cleaning agent. After the first removal I could rub the paint off so I left it in for another cycle to see how much paint could be removed and it came out cleaner and the remaining paint would need further action. Maybe I'll use some stripper to see if they clean up and if they look good I'll leave it gold, otherwise I'll rattlecan it.
 
I am rebuilding a clutch master cylinder and put it in my vibratory cleaner - it went in black and came out gold
Click to expand...

Probably a Goldline master cylinder. Not sure there is any difference (aside from the colour, which is anodised). I would leave it gold, as the anodised finish is impervious to brake fluid.....
 
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