MZ/MuZ Riders

i took the bike out for a spin today, and 2 blocks down the road i noticed a squealing noise.
its steady, so i dont think the brake disc is warped, but its puzzling me because i cant find anywhere in the owner nor repair manual as to how to adjust the tension on this thing. as in to let the brake be more slack when its not engaged.

only thing i found was on page 79, mounting pins. it says there that they shold be screwed in all the way when installed, mine were 4 revolutions OUT. i played around with them screwing them in all the way, and out but i noticed no difference in the brake behavior.

any tips/ideas?

the pins need cleaned and there are metal clips in there that loose there strength after several years
and need replaced ..do new pads also ebc197 sx is different
we are talking about 125c bike

A small trick for try clean rapid the pad dust acumulated in the caliper because too much
braking in the city:
Use the air pump for tires in the next gas station.