2S vs 4S, but there are big differences obv that the 2 strokes the vast majority have dont come anywhere close to what a 4 stroke can achieve fuel wise or emission wise, so we are comparing a small amount of 2 strokes that bugger all have or want as they want the cheaper ones that burn more fuel... so where does this leave the older 2 strokes so many are happy with regards the epa standards. ??? or have i missed a point somewhere.