Have just been doing the brakes on the Z as i was getting a clicking/creaking noise coming from both front brakes when pressed. I noticed that only the pistons from the inside are pushing when the brake is applied causing the caliper to twist putting stress on the bracket and this is where the creaking is coming from. Does this mean the calipers are fecked or maybe just needing bled or is it just a case of stripping them down and re-building?. I know there not the best calipers as they are the early ally ones.

Thanks in advance. :D

Pistons seized, very common. You can buy a caliper overhaul kit, although you may be able to unseize them manually by removing caliper and forcing piston in and out yourself.

 

This can cause Master cylinder seal failure though from forcing brake fliud the wrong way past the seal so its worth clamping the lines first to prevent this while trying to unseize pistons.

Thanks for the info buddy much appreciated.

Just remembered the pistons aren't seized as i could push them in and when i pressed the pedal they would only come back out to their origional position but go no further.