The bike I got have like 6500 miles on it. It has a slight hesitation when you first give it gas and its fine when your on the gas slightly and driving around, even when on it hard it seems fine. When I cruise, it seems rough too, like lightly on the gas. I don't think its ever seen a valve job. Also it seems rich at idle, I can smell it. Has new filter and I put fuel additive in as well as I used half a can or carb cleaner on it. Is there a good howto on a valve job and good site on how sync the carbs? I looked on here a bit and also in the kawasaki manual and didn't find much. I know there has to be something somewere on this because you have to doit like every what 7k or so?