think of it this way, your jetting ratio is 2:3 from then, till now. so now, @ 32:1 with the new jets, you are like running 20:1 on the previous. 48:1 would be the same amount of oil as you were running before @ 32:1. i pretty much guage the oil mix by the smoke, but i double checked by how much oil is actually in the juggs. dropping th needle will help the low-mid throttle, but you are having lean problems up top. mix some fresh 40:1 and try again. running less oil will richen up the fuel, too.