This has been some funny ####!!!
This IS NOT a four stroke guys! Take all your radiator and drag motor talk and throw it out the window! These are two strokes, bird of another feather!
80% of the heat is held in the muffler on a two stroke. Open up the muffler, then richen it. Heat gets moved, period!
Now, figure with a stock saw 20% of the fuel mix is unburnt. THAT is how it COOLS the engine. The air fuel mixture is used to PUSH the burnt fuel out. This is why the EPA is trying to kill these motors.
Now we woods port an engine. Remember, NO VALVES, so we widen things and make it flow better yet. Probably 30-40% unburnt, COOL, fuel mixture blows through the engine and out the exhaust cooling everything.
Regardless of what Brad got out of a 260, that is not a typical woods port. Typical woods prts are 2-3k engine RPM gains.
So minimal RPM gains, considerable more COOL air/fuel flowing throughout the ENTIRE engine, and LUBRICATING EVERYTHING while doing it, and NO restrictions to hold the heat in the muffler.
There are some FACTS to ponder.