First off, im new to motorcycles and auto repair in general but i want to be more knowledgeable and start doing repairs on my own. So any advice would be greatly appreciated. I started noticing a whining noise coming from the crank case or more or so where the transmission is of my 1974 CB360. When its in neutral its really whining fast but when i change it to first gear it stops until i start moving then the whining noise slowly starts building up and gets faster as i add more throttle. I looked online and the only information i gather was that the bearings on the transmission are damage. Can anyone give me some insight on what other causes it might be. Or any preparation for fixing these bearings? thanks. note i also thought it was the cam chain so i already adjusted that and that didnt seem to do the trick.