86 430 AE Front master cylinder Question

Looking for some help here, I'm attempting get my dad's old bike going again and right now I'm working on getting the front master cylinder working.

There's a spring in the cylinder and I'm wondering if the spring comes out? I've tried pulling on it with a pair of pliers ( may not be the right way to go about it ) but it doesn't seem to want to come out which makes me think it's not supposed to.

Also, what is the best way to remove oxidation from the aluminum?

A couple of options:

try winding the spring out.. turn it as you pull it out ....spring and plunger assembly should come out.

Its always nice to have some new brakes on an Auto!

http://hva-factory.com/wheels-brakes/husqvarna-magura-master-cylinder

http://www.husqvarna-parts.com/catalog/item/3736887/4180039.htm

Parts available as well from Andy and Phil.

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front master cylinder 86 or 87 I have it in used
86 brake caliper one piston , 87 two pistons , it's the best for one AE because no brake engine
if you don't find in US I can to send it but there'll have shipping same if the master-cylinder is free

I haven't had a good look at the caliber yet but I think it will be ok once I clean it and rebuild it if it needs to be done. As for the master I think it might be to far gone for me to save, It has oxidation all over the outside and it looks like it might of gotten inside it as well.

If you want to upgrade a 97/WR master cylinder with a 87 left side fork leg and a 87 twin spot caliper work real nice.

I've decided I'm just going to do a front end swap. Going to put modern forks on the bike instead of using the old forks.