I have an 03 400EX bored to a 440, 11:2 to 1 Ross piston, Stage 1 Webcam, Big Gun rev box, stock headpipe(welds ground out)
White bros. R4 muffler, no airbox lid, aluminum airbox. I was running the stock carb, but i have one now that is bored out to a 37.5.
I was wondering what you guys would recommend as a place to start with the jetting. The stock carb had a 165 main an 42 pilot.
I would appreciate any help.
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