2 stroke or 4 stroke, whats the differences?
The one thing you need (or should have, anyway) with a 4 stroke is a tachometer. With a 2 stroke you can set the needle easily by ear, but with a 4 stroke you can't.
Many people run synthetic oil fuels in 4 strokes, as the castor residue can build up on the valves. There's no added oil in the crankcase.