It seems to vary a lot for different bike/setups meaning bike model and what pipes, air mods, etc. I'm not exaggerating when i say that my 05' speedy with Tpipes, AI removed and other wise stock got what I consider a major boost in power by simply removing the snorkel. The Tbike guys showed a few HP increase on thier dyno after removing thiers. To me it felt literaaly like a good 3 or 4 HP increase. It actually fely like a bigger increase than the pipes themselves did. Why your's turned out different i don't know, but many speedy owners (mostly 790's) have seen the same results as i did. I don't know if there is a difference between the america 790 and the speedy 790, but i don't think so. However, you don't say whether you have stock pipes, and most or possibly all the guys i've read about having great results like i did have aftermarket pipes. As for the sprocket, if it's better now with bthe snorkel in going up or down in sprokcet size isn't going to change the relation between how it runs with and how it runs w/o the snork.
