I noticed after all these air filter changes I have been doing my bike was kinda boggy. After Torque took a spin he agreed. We decided we needed to change the main jet and it worked. I was using a 157.5 and we tried a 155 and half a white spacer. It was better but still felt a slight hesitation in throttle response. Luckily I foresaw this and bought a 152.5 and it worked awesome. My gas mileage with the 157.5 sucked bad too lol.
now if only had nitrious... Lancerrrrrrrrrrrrr hehe