I am experencing a clicking sound every time I start to pedal my bike and I have no idea what is causing it. I would try taking the crank case appart and see whats going on inside but I would like to know more about how to take appart a crank case before I start trying to. Its a bit of a risk but I want to solve this problem without having to spend over $60 at a bike shop on replacement parts and repairs first. From what I know its not the front derailur causing it so I figure it has to be a bering or something. But I want advice from someone with experence before I do something wrong and make things worse so bike repair experts pease help.