Hi Trevor, I will ask Scott what specification rings he fitted, I know they were Total Seal brand, also that he has not fitted oil seals on the inlet (that would involve custom guides?) but then on the other hand his bike does not puff smoke particularly badly on the over run like you'd expect if oil was being sucked in through the guides.
If his problem is caused by blow by, which is as a result of fitting gap less rings, I think the easiest option would be to go back to conventional rings! What seems odd to me is that one does not hear of oil seals blowing out due to serious excessive case pressure problems on engines needing rebores, which implies the blow by on his bike is really bad, yet his bike is not smoking that badly.
On a recent long run to Dunedin (after a top end rebuild, new small ends, and light rehone) he thinks the crankshaft oil seal blew out after around 150 miles of 60mph cruising this limited him to 50/55 mph for the next few hundred miles or so, but after that the engine gradually improved until we were back up to 60 mph (oops officer) plus at the 1000 mile mark, so the theory is maybe the rings are very slowly bedding in. They have done a few thousand miles in total now.
So his current plan is to glue the seal back in and give the current set up another go, but he would still like to know if his breather timing is standard!
Going back to prior question, the oil tank breather has been checked and is not blocked.