4 stroke
No if it says 4 stroke or 4 cycle you can not put it in a 2 stroke or 2cycle engine.
32:1
Soy
Your bike is a 2 stroke. since you are mixing gas and oil together oil naturally blows out your tail pipe. if this is happening, then there is nothing wrong with your bike, unless it is a 4 stroke.
If your 2 stroke dirt bike starts to smoke really bad that means you have to much oil in the fuel or the wrong kind of oil. Or the pistons, oil rings or cylinders are badly worn.
Best to use two stroke oil. Mix it with the petrol, (I guess you know this)
standard 2 stroke oil snowmobile or dirt bike oil
Depends on the manufacturer as to what type and weight oil to use.
Every Honda xr 80 ia a four-stroke, so no you don't need 2 cycle oil.
0.75 litres
it smokes out the exhaust...