profgigawatt,
Wow! Those are impressive numbers.

w8ye,
Yes, as I see it, 2 strokes are notorious for burning only part of the fuel/air mixture and dumping the rest out the exhaust. Really, it's the fuel/air mixture coming into the cylinder and out the exhaust port before the exhaust port closes on the up stroke. When the spark plug ignites the mixture in the cylinder, the piston moves down, then the small hole above the exhaust port lets hot gases into the muffler to facilitate burning of the unburned fuel/air mixture in the muffler. So no, it's not a compression release. Please correct me if I'm wrong.