80cc Clutch issue

Hi guys I'm new to the forum. My friend gave me a bike that the motor fell off of when he was riding it. He bought it from someone else. I have replaced a couple of parts took the clutch apart to check for wear and reassembled. I replaced the 8mm clutch ball, but I am discovering that the pin and ball are not engaging the clutch when depressed. I think the clutch might be stuck some how or broken not sure.. I haven't pulled the drive in sprocket off in order to check has anyone else dealt with this issue?

Thanks I'll try that.