Air fcr jet main
This mod is creating a 3 inch by 3 inch size hole in the that you will need to cut into the top of your airbox where your snorkel currently is.
With this increase in air flow your carburetor will likely need to be re-jetted. Below are some sample jetting recommendations:
– 150 main jet (155mj for full exhaust system)
– 25 pilot jet
– 2nd clip on needle from top
– 2.5 turns out on fuel screw