don't feed him full of crap.
A 2-stroke, or 2-cycle fires once every 2 strokes of the piston, and has no valves, only ports.
and a 4-stroke, fires once every 4 strokes of the piston, the advantages, 4 stroke has a cooler running temperature, they are more durable and much more "torqish". they run at lower RPMs, and are smoother.
A 2-stroke will wind out alot quicker which gives it much quicker acceleration, but in the long run, a 4 stroke of the same size will have almost twice the top-end of the 2-cycle.
E-mail me if you need to know more.