Bonneville America Forums Forums Technical Forums Performance Mods Airbox replaced with air filters...why?

OK, I've put about 1K miles on since the re-jet and TPS disconnect and it feels like a whole different bike.Maybe it's just my over active imagination but it seems to get smoother and quicker of the get every time I take it out. Do jets require a break-in period? I swear it gets faster each time a ride...or maybe I'm just getting braver...