Ashamed, bought a used clutch Master cylinder

[Z-MAN74]

Hey guys, I had to buy a used clutch Master cylinder for my 06' busa, my worst nightmare of buying my first used part, it won't bleed, with it all unhooked i tried covering the outlet and pumping the lever and not a drop came out, oh ya forgot to mention when I got it took cap off and all Gunk!!!! gave it a gas soak for about 2hrs and cleaned it up could it still be gunked internally after the gas soak?

[Kiwi Rider]

You need to remove the piston and examine the bore and seals.
When you say 'a gas soak', do you mean gasoline/petrol?
If so, bad move.
Never ever expose the seals to any hydrocarbon based fluid, that means mineral oil and gasoline.
The seal material will expand and won't work within spec any longer.
The seals only work with DOT4 brake fluid.
The best way to bleed a clutch line on the Busa is to put a vacuum (mity-vac) on to the slave cyl bleed nipple and suck the brake fluid thru 'til you can see it in the mity-vac hose, shut the nipple off and there should be enough pressure at the lever to bleed whatever air is left in the system.
I usually have good pressure after using this method every time.
Good luck.

[CBXRider]

You’re gonna need one of these too.

https://www.partsgiant.com/p349714-...oFsKG1XLQgM3Fco9TdCpI3xoC44wQAvD_BwE&f=114534

[c10]

Don't forget the K&L tool for the clip in a pinch red scotch bright , coat hanger , and a drill you can make a hone to polish out the inside bore .