well my stock banshee beats a new 700 so something isnt right either your compression is low or yu are too rich
so check your compression
do a plug chop
use a quality premix oil (amsoil,klots,castrol,maxima,etc)
40:1 is a good mix
depending on your elevation i cant relly help out with the jetting but i think safe would be 290-300 mains with the lid removed
but a plug chop is very important and so is a compression check if a stock raptor is beating you
fmf are good pipes and as long as you have the outter wear for the k&n you should be fine but dont remove the lid unless you have no water to go through
well good luck with her and dont forget to check your compression and do a plug chop
you compression should be 120ish psi and both cylinders should be within 5 psi from each other