safely freeing a seized brake piston

[jimv50]

This man is my new workshop hero.

[UK Pete]

Good tip thanks for sharing
pete

[onethumb]

That is a good tip. Used the same idea on the swing arm bushes.

[royhall]

Is that an expanding rawl bolt in there. Like it.

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[Green1]

I prefer using compresed air and forgetting to cover the caliper with a rag so it shoots across the garage when it pops out. 
 

[ST1100]

I prefer using compresed air and forgetting to cover the caliper with a rag so it shoots across the garage when it pops out.   

LOL! Ditto (on the compressed air... even build an adaptor-hose), but I first shim out the calliper with a selection of wooden strips... 

[Green1]

Why didn't I think of that to obvious I suppose   

[Trigger]

After doing one on a CX500 with compressed air and forgetting to take my hand out the way, found it much safer with a grease gun

[Green1]

It doesn't go with the same exciting bang though
I'm also to tight to waist the grease 

[AshimotoK0]

Assuming you are replacing the seal, I just heat the alloy body with a Mapp gas torch and then tap the housing sharply onto a flat steel plate to free the piston off. Has worked fine for the last 3 calipers I stripped. These were the original Honda ones as fitted to 400/4, /250/360G5/500/4 & 750/4 though.

[royhall]

I use and old master cylinder and hose. Fill it with brake fluid and pump till it pops out. Comes out a bit more gently than compressed air but is a messy job with the fluid running out at the same time as the piston.