I have not torn it down yet. It only comes out with a good load on it. A good size jump out of a turn . I am expecting to find worn cogs on the side of a gear or a bent shift fork. The bike does have a lot of time on it. I was getting the parts together to do a top end. I was not planning on splitting the case. Is there a way to diagnose a tranny before I take it apart? I would hate to miss something and have to go back in. I had to replace some of the trans gears in our 06 last year. The screws that hold the large weight for the balancer broke and messed it up pretty good. I guess my son is just hard on the trans.