The 2 vs 4 stroke debate has always made me laugh, and I guess that is why I posted the link to the website.

In my opinion, the ONLY reason to run a 4 stroke is the sound. Either you like the sound, or your field has an issue with louder 2 stroke engines. That is my opinion, others would certainly disagree.

For Example

Cost of O.S. .46 FX Approx $115
Cost of Saito .72 Approx $225

Most would give the edge to the Saito .72 on a typical 40 sized plane. For an extra $110 I would sure hope so.

Now if you were to take a Sport Jett .46 Approx $220 and put it on the same plane, you would see a pretty dramatic difference. This engine will turn an apc 10x6 prop at close to 17,000 rpms and yet still idle around 2500. Throttle response is smooth, and transitions extremely well for a two stroke engine. The engine is True ABC constructed, and one of the finest American or foreign made engines you will ever see.

Probably not responsible of myself considering a legitimate question was asked.

Just stating my opinion from the other side of the fence.