So ive been running a muzzys slip on with tweakmons map and just never got a new air filter. I knew it was dirty, the bike felt like it was choking. Last nite I put a K&N in and did the jumper mod. It was getting late so spark plugs and -1 front sprocket are going in over the weekend.i left the house this morning to go to work and it felt a lot stronger. The on/off throttle transition is much smoother also. I was at a light to turn ionto the service road to the expressway. When it turned green, i only went 3/4 throttle and the front lifted so much quicker then before....Im lovin it. Cant wait for the sprocket and a custom tune. Im probably gonna go for a header too.