An aftermarket kit tuned for performance? Well I would say that none exists and here is why. You, as a mechanic, will tune the carb for performance by varying the sizes of jets / needles to get the best mixture at part and full throttle. Different combination's are required based on other engine modifications ie exhaust pipe, cam, piston, even air filter can require alternate jetting.Things can at times be counter intuitive, you may need to go leaner when you assume richer is the way to go. I assume the carb on this bike is a Mikuni. Get a set of different sized jets / needles, read some tuning theory and have at it. Jets tuned for performance don't exist. You use the jets TO tune for performance. That is the distinction.
