Fizzics Boy

Is there anyway to tell if your clutch cable is stretched out really bad. The pedal flops around and can move with almost no resistence for about 1.5 inches when you first press on it. I have never noticed it like that before. I have also tried adjusting it and it was no help. I don't wanna be driving around and it snap on me or anything like that. Any help or advice would be greatly appreciated. Thanks