My bike started missing and really bad at about 1100 rpm. It is a 97 zx6r with 6200 miles. I have only hit redline once, I think. Could it be the carbs. I am going to have a Stage 1 jet kit put in. Should I have the guy adjust the valves while he has it? I just put new NGK plugs in a week ago. Also how long is it before the CCT should be replaced? I don't think it needs it, I'm just curious. As always thanks for the help.