There are lots of ways to pack more air/fuel through a carb and into a 2-stroke engine's crankcase. However, thats not the problem.. the problem is the transfer phase..
When "extra" mixture is pumped upward through the transfer ports and into the cylinder _it is free to escape out the open exhaust port_ This is because the exhaust port is still open after the transfers get closed off. The result is no extra mixture will be trapped in the cylinder since any extra squirts out the exhaust. The cylinder / piston can only trap so much.
If the engine is properly prepared it is possible to trap the maximum reasonable amount of fuel/air mix.. this involves various methods of performance tuning and results in much improved power output over a stock engine..
But unless extensive, radical modifications to the cylinder ports and exhaust system are performed, supercharging of any kind is a wasted effort for the above reason.
Another thing about "ram air" (which i assume you are talking about) is that the ram effect begins to be productive at about 120 mph.. Full blown race setups do take advantage of this small "ram" boost.. It's expensive but in competition every little bit helps.
Although the wind in your face feels strong at lower mph, there is actually a tiny amount of pounds-per-square-inch of pressure.
Performance exhausts for 2-strokes all work on the same basic principle.. that of sound waves bouncing back and forth inside an "expansion chamber".
When proper lengths, tapers and diameters are chosen for the various pipe sections, these sound waves (traveling at the speed of sound in a hot gas) can both pull exhaust out and pack more fuel mixture into the cylinder. The result is a cleaner, more dense fuel mixture in the cylinder. Power is dramatically improved.
Search the net for "expansion chamber" for information.. there's tons of it out there from simple to complex...