There's a shim that goes in between the claw collar and the finale gear. The pillow side faces inward towards the sprocket. Check all your shims make sure they are installed correctly.
check the clutch the cork shouldn't be touching the inside of the clutch drum you should have 1mm of space in between each shoe.
Check the first gear clutch make sure its not binding againts the clutch drum.Pull on the drum back and forth should have very little play the manual has the correct specs. (edited)