need some help on 95 vmax 600 jetting with twin dg pipes

[YamahaSXR700]

hey guys, my buddy has a 95 vmax 600 and he has twin dg pipes,and i want to make sure the carbs are jetted properly, right now hes running 155 for main and i looked up the stock specs it should have 156. something so what is recomended to run with the dg twin pipes?