My bike felt really sluggish on the track one day and then died and would not start. I pulled the head off and my intake cam had completely worn a whole in one of the valve buckets and one of the lifters is worn down and squared off. Can anyone help me figure out what happend and why it only happened to one valve? Everything else looks good I have not pulled the valve out yet but I can push it down a little with my thumb. And also the bike has a 270 kit idk if that makes a difference or not. Thanks guys!