Hi,
So here's the neat thing about the oil injection pump- It varies with the throttle so that at full throttle it sends more oil.
To get this wide open throttle mixture we would need to mix a very oily mix, which would likely smoke and foul plugs at low speeds.
Old timers say they've never seen a bad oil pump in 20 plus years. That's a statement.
For the record i like to pour a whisker of 2 stroke oil in my tank anyway...just because i want all the smoke! Lol
Good luck!