Maybe your air filter is clogged and needs to be washed or replaced?
On a related note, I hope you'll forgive me for saying that "Testi Comfort" has to be the worst bike name I've ever heard. On the other hand, it wouldn't make a bad name for a jockstrap-- "The Testicomfort, new from Hanes. Athletic supporters will never be the same!" OK, I'm done now.