Originally Posted by
hsukaria
The front bearing would benefit from having a shield on the front face to reduce oil leaking out. The old engines didn't have the shielded front bearings, maybe because they weren't available? You had to live with fuel oozing all over. I get that with my old Fox engines.
Some older engines use a spiral on the shaft in front of the induction port to screw the oil back into the engine. Those probably did not need a shield.