03 honda 400ex with curtis sparks exhaust, rev box, and k&n filter. I need help on this.

 

I was not getting any help with mine i just did the same thing on my 400ex so i ordered a fmf power up jet kit for 55 bucks and man it is the best thing i did it has all the charts that you need for and pipe and other mods done.

 

I agree,takes all the guess work out