Will have to check the fz6, but my car used to squeal like a pig when I barely applied the brakes or moving slowly. I kept checking and checking, plenty of meat left on the pads every time. When they finally wore out I went over to one of my mom's friend's house to barrow his tools/jack to change them myself.
This guy is apparently the Chief mechanic for the city of Largo, has been ridding motorcycles for 30+ years, and owned his own Garage for an eternity before he got bored and sold it.
He told me the squeal was the result of the pads being almost too loose and, in effect, vibrating in their mounts when slight pressure was applied. He had me put some weird purple goop on the back of my new pads, between the shim and the caliper mount. They haven't made a noise since.
Maybe its a similar thing here? pedwards claimed success by putting grease on the back of the pad.
