hello everyone. ive got a quick question that hopefully, most likely all of you will know the answer too. i have a 76 cb550 with some front brake issues. due to a lack of tools, im very limited to working on the bike myself, so ...well, heres maybe my first mistake.... i met with and got to know a local phoenix area bike mechanic, felt comfortable taking my bike to him to fix the squeaky brake problem. as far as i could tell, the brake didnt need adjustment nor did it need pads. the disc does have very slight grooves, but with my knowledge from cars, i wouldnt think that these grooves would cause this horrible sound... so in the shop, out of the shop and 140 dollars later, the bill i received with "current problems" listed (being front brake squeaks)...now read "SERVICED" and so off i rode back to my house...this is after my bike sat inside his shop...which i will explain in a second. i get the bike home, no deal, drive around all nite, no deal, fall asleep, wake up and get on it to ride the next day about noon or so and the front brake is clamped and after getting it off the center stand, getting it back on is pretty hard, just because of the front brake dragging. weird.. and so it goes,, when the bike is sitting either in the sun or whenever its warm, 70 degrees or more, the brake is grabbing pretty hard. so... heres my question, i managed to get the bike, back to the shop, with the shop owner saying "i will take care of it" since the previous bill read "serviced".... so i get it back there a few days ago and today i get a call saying that its fixed and he replaced the master cylinder... now please, correct me if im wrong, but... there was consistant pressure on the brake lever, it didnt leak, and when it was cold/nite here in arizona, the brake worked fine and didnt squeak...what would the master cylinder have to do with this? am i blatantly being ripped off? seems to me that i am and once i make it back up there, im going to raise hell. thanks for any and all input.. anything will help... thank you, lee bender.