350X Carb Question

[roofinggun]

Hi Everybody,
I have been hearing everyone say that a 400ex carb will add a lot of power to a 350X and was wondering what the differences are. I know the jetting and that is different, but by how much and can I make my 350x carb match what a 4400ex carb has to offer?

[Tecate performance]

the 400ex has a similar design keihin carb to the 350x, but with an accelerator pump and slightly larger bore. the accelerator pump should help with throttle response. i believe white bros still sells a 38mm mikuni carb kit for the 350x.