Expansion tank cleaning

[Freck]

As above why do you care? Just ride it.

I'm in the process of cleaning my Fazer up while I'm unable to ride it because of injury.
I'm doing things like polishing up the headers, tidying up the front of the engine etc and renewing the coolant, oil and filter, brake fluid and so on.
While doing the coolant I found that the expansion tank had a broken mounting so got hold of a s/h one which I wanted to clean up before fitting.
If I could be riding it I would be.