I have '00 warrior. I have installed a K&N filter which is the only mod so far. Do I need to re-jet just for it. I am going to install a pipe next. I know that I will need to re-jet then, but I am not sure what size jet the stock carb has. If anyone knows for sure, please advise. Does anyone know which pipe works best for trail riding and low end torque. How much gain does a torque stuffer give you? re-jet?