i got it at a yardsale a few saturdays ago best 40 bucks i ever spent, as far as i know it's original and was well cared for. i can't remember riding a bike since i got a car in high school, i'm almost 35 now so it's been awhile. i have crashed a few times, and i dont have a maintance manual, can't get 1 from yeti.com either so i would appreciate some advise on what to do. theres a clicking sound in 1 spot as the crank goes around while peddeling, rear disk brake grinds in 1 spot while just spinning doesn't seem to be bent out of shape but i can it's boed a bit can this be flattened out? front brake sounds like a fog horn loud eeeeeeeeee but has all the stopping power as ever, and i need a few minor parts chain guard and hand grips and wider peddles.