Topic: Storing a Master Cylinder

[trinorman]

I just replaced a perfectly good master cylinder of my CB750K2 with a Brembo 11mm unit.  Great improvement in my opinion with much better feel and much more braking power.

Here's the question:  What is the best way to store the original master cylinder?  Should I plug the banjo end and fill with brake fluid so that the seals stay lubricated?  Or drain it and let it dry out and store dry?  I would like to keep it in good working order so that it could be put back on at some point should I want to sell it and bring it back to "stock".

Thanks.

[mrblasty]

A rebuild kit will run you somewhere in the $40.00 range. I would say fill it and plug it.

[TwoTired]

Brake parts assembly fluid is intended exactly for the purpose you describe.

You should flush/clean all the brake fluid from the unit and reassemble with the assembly fluid.

Then, put the Master Cylinder in a plastic bag with a small bag of dessicant, seal and shelve.

The MC will be ready for use whenever you'd like put it back in service.

Cheers,

[trinorman]

Thanks TwoTired.  When you say reassemble with the brake parts assembly fluid, do you mean to fill the reservoir too, or just be sure everything has a light coat?

Thanks again.

[TwoTired]

No, you don't fill the reservoir.  Just the bits inside, mostly rubber, should have a film on them.
Cheers,

[trinorman]

Great, thanks.  Never heard of this stuff before.  I tried 3 different auto parts stores today with none of them having it.  The last one called a local supplier and ordered it for me, then went and picked it up,  and I had it 15 minutes later.