My 2002 Kawasaki stutters below 4000 rpm when in neutral while giving it throttle it also does the same thing while in gear but if I raise the rpm just before take off it shoots out the hole with no problem.
I don't think this is normal, what could it be?
Does it happen at any throttle setting?
It looks like your 2002 ZX-6R is carbureted, so it could have something to do with your jets. Different components of the carburettor are responsible for different throttle settings. If its actually low throttle settings instead of low engine speeds, I'd try cleaning the carbs and adjusting the settings.
Otherwise, I'd check the battery voltage. It's possible there is a problem with your charging system, and you aren't getting enough voltage for a good spark until the engine and generator are turning at a higher speed.
