Discussion Starter · #1 ·
I just bought a 2004 400ex that has a full White Brothers Exhaust. (pipe and muffler) It has all stock engine components and a stock carb and I want to run it with a closed lid on the airbox and a Two-Stage Foam Uni Air Filter. What should my jetting look like? I am new to this so any tips are appreciated. Also I am located in central to northern Michigan so my elevation where I ride is anywhere from 500ft to 1500ft.