I purchased a ´81 honda cm200t 3 years ago. I´m very pleased with the bike but my only problem is a high pitched screech when I use the front brake. It used to be only in the morning and it would disappear after I used it a few times but now it´s there all the time. It only happens when I operate the brake gently, not if I slam it on. I had it into a shop last year and they said it was because the brakes were new. They cut slots in the brake pads and the problem went away for a while but it returned when I started to use the bike this year. Has anyone else experienced this or have a solution?