Originally Posted by
supergymnast
If I had to meet a 100 bike a day quota I'd change things up a bit too, probably without huffin solvents.
I recall reading somewhere that they changed the side of the oiler at one point.
FWIW, I have a '66 or '67 Hercules and the BB shell casting has a small flat spot that would be where an oiler would go. I've often suspected that they may have changed oiler location when the tooling wore out and they made new. Then continued to use some old tooling well beyond the time they were using BB oilers.
Just a guess, though.