400ex Jetting

[EX4me]

Just wondering what's a good starting point for rejetting a 400ex. It has K&N filter, can't decide rather to run air lid or not, fmf megamax II exhaust. I've already put in a Dyno Jet 155 main. Also what setting for needle clip?? Just trying to get an idea before I put everything back together.

[EX4me]

btt..

[BADTRX400EX01]

I heard the Megamax hinders the 400 EX, but just what I heard.
Try a 152 or 155 main and a 42 pilot. fiddle with fuel screw as needed. IMO, run the airbox lid if you are running a K&N filter. Or get the UNI vents, I think I might do that.