Seized front calipers help

I have an '83 SECA750 that was purchased with seized front calipers though it does have a brand new handlebar mounted MC. I have the calipers in pieces currently and have tried several times to get them out using vice grips and heat but to no avail. The current pistons are properly trashed and I have replacements (plus seal kit) so I am not worried about marring them. So far the closest I got was one of them rotating slightly in place when I dunked them in boiling water and vice gripped'em up last night.

I bought a grease-gun to do that trick and I couldn't get the pressure to build in the caliper because the bleeder valve wasn't a proper zerc (grease squirted out the side not in). Does anyone know what the thread type is for the bleeder valve so I can get a zerc fitting on these calipers?

I have some spare brake line and I tried to build pressure in the caliper by connecting the MC to the caliper with about 6" of line in between. I think there was air in the line because I couldn't get any pressure going for me.

Do you have any tips and tricks to clean up the calipers after the greasin'?

FYI the banjo bolt is a M10x1.25, that took me a bit to find earlier in the project.

 

I had good results with my air compressor, using the blow-gun tool and pluggging its tip in one of the holes I can't recall if i removed the bleeder screw or the banjo bolt to blow air in.

Be careful doing that, the piston could pop VERY fast and strong, I personnally put a thin wood board betwwen both pistons first.

 

Might be a crazy question but did you have the bleeder open?

 

So I got the pistons out after a fight with the MC and a short hose. The new seals and pistons are in and now I am bleeding the system overnight with the lever tied to the bars. I bled the system as much as I could using the bleeder valve a orbital sander, the whole nine yards but I still couldn't get amy good pressure out of it. Hopefully tomorrow it will be aired out.

 

The bleeder valve has a m8x1,25 thread you should be able to find a proper grease fitting.

 

When I bled my brakes i bled each section individually then I put a piece of clear tubing on the caliper bleeder and put that end in the bottle with brake fluid and started squeezing like my life depended on it, it seemed to work anyway