Since you have to use two piece sprocket (no choice) are you certain that you have the sprocket installed properly? The sprocket will have a stamping (# of teeth, logo etc. The sprocket must be installed with the stampings on both halves facing the same direction.
Couldn’t help but notice that the “skipping” issue occurs as the chain passes the split on the sprocket.
Rapid Racing Inc.
Vintage B-Stock Pilot
"When in doubt Gas it, It won't help but it ends the suspense."