Who cares about how strong a combustion stroke is? I care how fast my prop is turning. You just admit it yourself rudeboy a .60 size 2 stroke is more powerful than a .60 size four stroke. Not to mention a .90 size 2 stroke that is the same size and weight as a .60 2 stroke. Whenever 4 strokes get some kind of ignition we'll see, but as for now the numbers speak for them selves. In my opinion high dollar 4 strokes are just status symbols.