G'day Daniel,
Sounds like crankcase pressure like Muskrat said, did you re-new the cork washer,
the timed breather washer behind the timing pinion? Also, if new rings, could be
taking some time to bed inn. I would ride for another 1500 or so & then have another
look. Also, with that breather hole, I put a tube from the hole down to the bottom
of the frame & attach with a cable tie, saves oil all over the place & you can keep
tabs on whats coming out,
Cus