That’s a pretty cool idea! I was really bummed when they had to stop selling the Banshsee years back. Personally oil port injection on stuff I’ve owned in the past (jets skis) I’ve always blocked off and mixed the gas because if it gets plugged, or low you have no idea and you keep going ending up with engine damage. And it would inject to much oil and other times to little. You would need some way of progressively injecting with rpm/load and some kind of flow sensor that would cut ignition if oil wasn’t flowing (if someone forgot to top off the reservoir, got dirt in the system etc.). So for me if it’s a 2 stroke, mixing the gas is the way to go. Makes it much more simple.
I do agree with the single carb idea as that’s what I’ve run on the 4-5 Banshees I’ve owned/maintained over the years. my personal I have a Cub 400, dune port, 18cc domes, 110 octane, Bel Ray H1R 50:1 with a single 38mm carb, Paul Turner mids and been running this setup for 15 years and I haven’t lost a cylinder yet. I’m sure I could squeeze a tiny bit mor hp if I had 2 carbs but for ease of tuning and the dune riding I do, it’s perfect setup for me. Even if a single carb did cut back a little performance, someone who has no clue how to sync 2 carbs so both cylinders are pulling evenly would be better off with the single carb as the adjustment is made for both cylinders. That is if both piston, rings, reeds etc are in good order.
Just my .02, I’m sure someone will chime in and say the exact opposite