yeah, i guess by stock im talking totally stock, and not a modded stock cylinder.
im sure if you did all the necessary porting and tuning and variator adjustments you could definitely get better results--though i wonder if you would be doing so at the expense of low end power. and for me, the whole fun of mopeds is in the low end, not top speed. or maybe its like 75/25 low/high, but still. . .