Regardless of 2 stroke or 4 stroke, any combustion engine requires AIR (OXYGEN), FUEL & SPARK. Yea ?
The concept of the octane rating of a petrol in fact is NOT related to the fuel aspect BUT RATHER THE AIR CONPONENT.
The thing we are looking at here is the oxygen molecular content within the fuel - same principle when adding NOS to boost power - when adding nitrous oxide into a combustion, you're essentially adding more oxygen molecules to create a more efficient burn hence increasing the power potential of the chemical reaction - yes, the combustion process is in fact a chemical reaction. The ideal ratio for combustion is 14:1 (14 parts AIR to 1 part petrol), in a naturally aspirated engine, regardless of 2 or 4 stroke, a set amount of air available is determined AND LIMITED by the physical size of the cylinder, this in fact makes our engine not very efficient at all as a majority of the energy stored in the fuel is not converted into physical energy to turning the crankshaft but rather wasted as unburnt fuel / heat / noise etc.. now, by increasing the oxygen content in the fuel, you are essentially increasing the amount of oxygen available in reducing the amount of wasted energy hence more power is generated at any given time with the same amount of fuel being drawn into the engine.
What I suggested by adding Toluene, methanol or ethanol to the fuel is a means of improving the ability of the fuel to make more power by increasing the supply of oxygen available to the combustion process. In fact it's not too different to increasing the amount of oxygen into the system by bolting on a turbocharger....