RE: Four Stroke?
Wings:
Looks like Minn is out to lunch (Supper?) so I'll give you my answer, and I really think he'll agree.
If you are truly price limited, or just want an inexpensive four stroke, stick with the Magnum engines. They are the same design as the OS for a lot less money. And they have chromed cylinders instead of the OS nickel plating. That alone makes the Magnum a better buy, in my opinion.
If you can spend "OS Money" don't consider the OS line, get the Saito instead. Far better engines, and depending on the application, I'll take the Saito over the YS too.
Bill.