It won’t move!!

1987 350 FourTrax. I just rebuilt the motor along with new clutches and one way bearing while I had it all open. Put it all back together and it runs better than the day it came off the show room floor. However, it now will not move. When you put it in gear and the machine will slightly jump like normal (no grinding) but it will no move on its own. If you rev it wide open it looks like the wheels will try to move but it could just be from the vibration. What could I have missed? Drove fine when I pulled it in the garage to do the motor build. Oh and yes I did soak the clutches in oil for a couple days before I installed them. This will be the third time taking the side cover off to try and figure something out. I would love it if you all could tell me exactly what I screwed up. :icon_ cry:

Thanks