Around here Saito is by far the most popular 4-stroke with YS a distant second. But YS is definitely climbing due to the outstanding performance of the new 110's and 140's. OS and other 4-strokes are few and far between. 4-stroke sales seem to be driven by performance and availability more than cost.

OS FX/AX 2-strokes are still the most common but Evolutions are really gaining fast. Most beginners are starting with H9 trainers with Evo engines, and then they feel comfortable with the engines and keep on buying them. Good marketing on H9's part to use a good, reliable engine on their trainers. Some engines like Supertigre are excellent but since they don't come on heavily marketed trainer packages they lose out on future sales.

Walt