Sticky Piston is no Team Player

[flamegrape]

My motorbicycle was making a "shushhhing" noise and I quickly identified this as my front nearside pads pressing against the disc. I took the calliper off and the pistons were manky!

I've cleaned them up with Brake Cleaner and a toothbrush to the point they're sparkling but when I push the pistons back, there is one that's way tougher to set back than the rest. They're much better now, the bike is more responsive and the "shushhhing" noise has gone but I'm not 100% happy this isn't as much of a team player as the others!

Any suggestions on how I can persuade this to join in the braking fun with the others?

Thanks guys!!
____________________
Jonny (Riding his Kawasaki ZX6R J1)
It's one big learning curve right now

[DrDonnyBrago]

Remove the caliper, clean out all the grot on the piston and inside the caliper, grease/replace the seals and all should be well .

[flamegrape]

Haha - thanks CHR15

Cheers DonnyBrago - I'm going to try and undress it tonight and see what a little lube does
____________________
Jonny (Riding his Kawasaki ZX6R J1)
It's one big learning curve right now