what jets to use???

I got rid of my yamaha 426 and bought a 2002 drz 400s. When i got it it was already piped and jetted. It has a procircuit t-4 exhaust and i believe a dynojet stg 1 kit. I want to do the 3x3 aibox mod and was wondering what jets i will need. I just picked up a 145 main jet today and i am guessing the jets that are in it are what came with the dynojet kit. does anyone know how i should set up the jets if i am goin to do the 3x3 mod? As it is now, the bike pops slightly on the decel so it seems lean to me.

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