today when i got back from ridin i was lookin my bike over and i noticed that my chain was really loose i dont no why i didnt do very many wheelies or jumps anyone no whats wrong

 

I think I know what's wrong...it's time to adjust it!!!

 

Yeah, that sucker needs a tightening almost every ride.

 

Most people get the chain way too tight. "Almost every ride" is far beyond what it needs. Any good o-ring chain will go a long time with no adjustment. The only thing that really tears them up is getting burried in mud.