I never stated that the oil injection in snowmobiles was to the bearings. You must have imagined that.
you are right about floating valves- but I have had valves stick and I've had valves burn. A freind of mine has had a valve swallowed by the engine (but this was on a very old car) And I've done many valve jobs.
You probably didn't bother looking up the lubrication system used on the Subaru 360 either.
I still don't know what point you are arguing but it probably has nothing to do with what power source is better for mopeds.
And as I stated modern 2-cycle engine using oil injection to the bearings really has nothing to with being new except that it is faw newer than the concept of mixing gas with oil on those simple single cylinder jobs. Maybe I should have classified them as complex and simple engines.
I am sorry for missleading you.