I dont believe they are 2-strokes, if they were, what would be the point of having pnuematic valves...a 2-stokes reed cage system is basically like the valve setup of a 4-stroke, they have the same purpose, so they would cancel each other out if each one run on the same engine. Also, 2-strokes need to have an expansion section on the pipe to get the right power curves...i have seen a F1 pipe being made by hand and they definitely dont have big fat sections on them, plus there would be no were near enough room to fit them in the car if they did. A 2-stroke also wouldnt be able to produce no where near as much torque as a F1 car does, you would need one hell of a monstrous 2-stroke engine to produce all that torque.

I think im going to call BS on this one until you convince me properly, ie getting up another pic of you in the house or something. Anyone could get a pic and claim they are part of a F1 team.