I'm pulling the motor on my 99 to have head and carb work done and freshen up the top end but while I was pulling the primary I noticed the teeth on the clutch basket are breaking and there is a piece that doesn't appear to do anything. What do I have to do to replace the part with the broken teeth and do I need that split ring that appears to be doing nothing. Also on the other picture the small washer was under the large washer and then the nut was on top. The larger washer is now concave should it be flat?

 

I think I figured part of it out the two washers are from when it had an ultima open primary on it still not sure what that split ring is and I need to buy a new clutch hub.