quick ? about jetting

[noodles_400ex]

i have a 2007 400ex with a mutil-stage uni filter no air box lid,lexx pipe and i recently jetting with a 170. it runs ok but doesn't have the snap. now should i go with a 155 or 160 jet or what?

is it a full system or slip on?

[noodles_400ex]

slip-on and pretty much the whole air box cover is gone besides the outerwear that the lid holds for extra cover if that helps at all

whata bout elevation and riding temperatures and are they keihin jets?

with those mods, i would consider pilot and needle changes...those are what affects the lower 70ish % of the throttle