I have the European 2002 Fireblade and this is my history:
First I start to feel some spongy level, the advise in that moment was, "change the brake fluid", and one mech told me that change to DOT 5, He did it he wash the master pump and the caliper (externally)after that, the spongy level still.
The mech told me "change your pads", and I changed it with some aftermarket pads (front and rear), then I start to feel some "braked wheel...
Today I was to another mech and he check first the rear brake, the new pads was methalic compound, he told me that that kind of compund is not for the rear brake
Second, He show me that in each caliper, not the 4 pistons return to their position, due to a bad cleaning or bad piston seal, maybe there was DOT4 remainders???. and for that reason I have the braked wheel.
I`m so confused about this issue and need some adivises.
Thanks and sorry for my bad english.