I love boost.
Adding boost to a 4 stroke engine = not that difficult.
Adding boost to a 2 stroke piston ported engine = very very tough to do. (it has been done tho.)
One of the best threads on this subject is here: http://motorbicycling.com/f15/my-vic...-bmx-3556.html
Essentially the problem is that there are no valves to hold the boost in on a piston ported engine. No valves = no boost.
It doesn't matter how much air you can move or the pressure you can achieve if it just moves right through.
It is doable with an expansion chamber but this makes for a super peaky motor. Not something that will work very well on the street.
This subject comes up in one form or another every couple of months. We should probably write a definitive article that we can point people to so that they can see the hurdles they will have to overcome.