can you put a stock 450 carb on the 400ex and if so how much power will you gain

[exrider#3]

how much power do you gain and wat are the side affects

[Sick0]

You can do it with some mods. but the performances wise it all depends on what mods you have.... I wouldn't do it unless you already gone to a bigger bore and or engine major mods...

[insaneracin2003]

do a search,helps with keeping the thread count down,check this link out,great info on this swap
http://www.exriders.com/vbb/showthread.php?s=&threadid=160988