Seemingly persuading KTM to get involved in karting has been a challenge. Historically they have not been interested in selling engines alone. Perhaps the injection system could be adapted?
There’s a couple of options out there. I know Riley Will from BRC engineering has been developing something.
Everything on the horizon for karting (IAME 175, KA100 and VLR) right now is carb based, I don’t think we’ll see EFI being adapted anytime soon unless it’s forced in some way.
CRF250 is the closest I’ve seen to having something in production, but that’s a four stroke.
Like I say, the biggest problem is that the collective experience (ie ability to help others with knowledge) of the karting community would be somewhat diminished if EFI was widely adapted. You could argue that EFI simplifies it, I’m not thoroughly convinced that that’s the case.