Thinking about
"2 injectors aimed to cross paths just past center of reed tips"
& direct injection
Where the K5 bore is nikasil you could drill through the jug , insert an aluminum tube & weld it up on the inside of the jug & the outside so you have a tube to shoot the fuel in just at the very rim of exhaust closing, any later & the compression would wanna drive the injectors out. With a staggered injector driver you could run a single pre reed injector for premix oil that been thinned with a small amount of fuel to make it squirtable. It could be injected 75:1 @ idle, 50:1 @ 1/2 throttle, 35:1 @ WOT.
I'm picturing 2 "FUEL" injectors just at the top of the fore most intake port, one on each side of course, pointing to the rear of the cylinder feeding cool fuel just as that exhaust closes. Not quite direct injected but it could be benificial in economy none the less having the fuel not just blowing freely out the pipe.
So am I smokin the crack pipe or what
Just an additional thought some CR5 guys use the aluminum frame to carry extra fuel, theres your premix tank. I'd like to know the figure on waste fuel on a 2T & if its high enough that fuel consumtion could be drastically improved with the above idea