Jetting my 400Ex

[LI400EX]

I have an 02 400EX with a hite bros-e-series slip on with the stock header(12discs). Also K&n filter and modified air box lid.I never jetted my machine and was told that adding a jet kit will give me more power in the midrange and top end that I am lacking, Does anyone recomend an jetting main size and needle size. I live on long island and ride in PA. If anyone has any secerets I would appreciate it. Also thinking about adding a cam as well, should I add that before I jet it or its is okay to jet it frst, and which is a good cam to purchase. Thanks

[zephead400ex]

Try a 42 pilot, 152 or 155 main, pilot in the same posistion.

FYI: there are different needles, but when you adjust the needle you either move it up or down. There isn't a need to replace your needle as you do jets.:D