I was riding my CB550K last night, and was on the clutch lever holding it disengaged as I coasted to a stop. After a few seconds the lever went loose and the clutch dropped back in nearly throwing me all over the asphalt. Now I checked the cable and it is fine, connected to the lever on the case, but the lever does not seem to be doing anything on the inside. I know I need to crack it open, but any advice, guesses as to cause, or has this happened to anyone else?