400exbat
07-07-2002, 08:56 PM
I have a white bros. rev kit for my 99 400ex that has a k/n air filter and FMF megamaxII exhaust. It is the little black box that just plugs in up under the front plastic. Should I use it or not? What exactly is it supposed to do anyway? I read somewhere that it wont do me any good unless I have a highly modified motor, which I don't. If I do use it will it hurt anything? what would you do?