So I was out riding by bike it's been hard to start but once started runs and idles fine and it just bogged down and the piston was like melted on was side and then really scared on the other side what would cause it to do this ? I'm gonna change piston with new one and probably have to buy a new jug this is a 72.50 wiseco new to these bikes so any help would be appreciated I just don't wanna ruin another piston if this isn't normal to happen to a piston that's 10 years old