Did a spark plug change and air filter change this weekend and man did it need it. I did not realize how much crap the Hayabusa picks up on the interstate during my 120 mile round trip commute. She is running smoother than ever now, of course that is probably just in my head. My bike is right about 17K miles and the filter was black, not dark brow with some white, black.
Anyway, check your air filter and plugs.
Anyway, check your air filter and plugs.