I have an 05 f4i with a 2 bros slip on, an a K and N air filter. I just hit 10,000 mile on the bike and now I'm noticing a strong fuel smell coming from the air intake tube, that's connected to the gas tank, and also a strong fuel smell coming from my exhaust. The fumes are giving me a head ache. Whats going on?

 

Maybe check to see if you have a line leaking. Or maybe your seal on your gas cap is broke. If it's that strong coming out the exhaust I would tend to think the fuel isn't being completely in the cylinders. Take the plugs out. If thier covered in gas then go from there. Pay close attention if your gonna check plugs, when you take tank up look at lines real good maybe one is cracked,or has come loose . Good luck.