I bet the porting must have been interesting on that last one.
I was never really a 2-stroke guy, other than the Outlaw Kart, but yes, they were definitely worked. I bought it that way from a guy in Montana, after I chunked my first motor.
We had problems with the carb mounts breaking/splitting open, because in the bikes, the carb was supported on one side by the engine, and on the other by the air cleaner box on the frame, but on the karts, we ran only a smaller air filter on the back, with no support on that side, so the original mounts would split the rubber and lean out the engine and fuse the piston to the head if you didn't stop quick.
Some folks spent over $100 on stiff mounts that would support the carb, but I figured out how to use three zip ties to support mine, and never had a problem after that. I just changed out the zip ties every race day, and was good to go. Had a special carb on it, too, but I cannot for the life of me remember what it was called. I had to run it to feed the motor. All legal, but it wasn't a stock carb, it was aftermarket. Keihin, maybe? I can't recall.