I just got my bike, was riding, not fast. RPMĀ“s were prolly around 5-6,000, I attempted to shift, and cant remember if I didnt let off the gas, or didnt hold the clutch in all the way, but after i shifted into about 3rd or 4th gear it started making a real loud rattle noise. I think I may have broken a tooth off, but am not sure. First bike, and would like to know what some of you Experienced riders think. Cost? Possible other problem? Or does it sound about right?