You can get an extended air filter elbow or do the cold air intake mod. That should bring it up by a bit. But forcing air into the engine will lean it out. I think RB Innovations makes that kind of air filter that is put in the front.
by forcing air into the carburator, you will just get more air in your fuel air mixture...its much like leaning the high speed so you have more air than fuel, conclusively causing low engine life, and being a waste of your money.
It doesn't really matter anyway. Your engine will suck in as much air as it needs. I wouldnt worry about it. You could do a cold intake to decrease running temps a bit.