I'm no designer, just ok on theory from having tuned a couple efi cars that had some after market goodies added to them. I couldn't build one from scratch on my best day ever.
With waste spark system we have which is little unusual for engines these days I don't see how any sequential EFI is ever going to be able to distinguish the firing events from each other to determine which one is the power one and which one is waste. You could tell it to squirt every other one but when you start the bike how does it pick which one to begin with? The crank triggers can't tell, all they know is TDC which happens every rotation, which is why we have waste spark to begin with.
For non waste spark system I think the firing event itself plus crank trigger would to the job. But cars still use the cam sensor even tho they aren't waste spark.
There's also a difference between a position sensor and a trigger to consider and now I'm way out of my depth. Our crank sensors are triggers, not position sensors.
I'm thinking batch versus sequential is more about fuel economy any way.
If it was me I'd go batch with closed loop feedback and be done with it.
Truly tho, if it was me I'd just stay with carbs, there's been a lot of heartache put into the wildbros system by a few maxers and no one seems to stay with it in the end. With the closed loop its a pretty well thought out system too. But still no dice. I'd give it a shot myself but not for the money involved, it have to be way less than used flat slides with all the extra bits before I'd even bite on an EFI.
