I just hate that "4-strokes require more maintanance" arguement. I don't do anymore to my 4-strokes than I do to my 2-strokes.

In general, I prefer 4-strokes, but that is mainly because of the types of planes I fly.

There are some planes that I think a 2-stroke is much better suited for.

To give you a good analogy, If I were building a Dirt Bike, I would use a 2-stroke. If I were building a Harley, I'd use a 4-stroke.

It's the same with airplanes.

Can you put a 2-stroke on an Ultimate Bipe? Sure you can. Would I? I'd rather gouge my eyes out with knitting needles! [X(]