Seized caliper pistons

[dunnie]

Hi gsers,
I have sourced a used k1100 right hand caliper for my bike to replace my knacks red one. The thing is it doesn't have a bleed nipple like the old one, its got some other blanking screw in its place. Does this mean I only have to bleed the one side now then?! Also two of the pistons are bait stubborn, how can I get them moving again.
Kind regards Nigel.

 

[Steptoe]

Hi gsers,
I have sourced a used k1100 right hand caliper for my bike to replace my knacks red one. The thing is it doesn't have a bleed nipple like the old one, its got some other blanking screw in its place. Does this mean I only have to bleed the one side now then?! Also two of the pistons are bait stubborn, how can I get them moving again.
Kind regards Nigel.

The blanking unit should have a small hex grub screw in the top (it's the same unit as fitted to bleed an 1150 clutch) .

Remove the grub screw and insert a standard bleed nipple and bleed it as normal.
Or remove the complete unit and replace with a bleed nipple.

 

[dunnie]

Thanks step toe

As for the pistons being stuck I'm hoping that they'll just free up once I get some pressure behind them..?

 

[fatnfast]

A foot pump/ stirrup pump and one of those little red plastic adapters (that come with the pump for blowing up beach balls etc) has done the job for me in the past. Just push it into the hole where the banjo attaches.
Its more controllable than compressed air. Normally, one piston will move before the others. When this happens use a ziptie to stop it moving out to far and repeat for the other pistons.
Give them a good scrub with some clean brake fluid and a toothbrush. Avoid cleaning with anything to abrasive as brembo coat there pistons to slow up corrosion.