My son was spinning the tires (for no telling how long) on my 02 raptor and now it's like the thing is stuck in nuetral even when you cycle through the gears. no movement forward or reverse. Does anyone have any idea if this could be anything other than the tranny? Thanks in advance

 

Front sprocket pop off?

 

Well, it seems to be in tact it doesn't feel loose and the chain seems to be aligned correctly. There is a large nut on the outside of it.