Hoser 250r a-arms on a 400ex?

[FoxRacing440]

Will this work i want 2" wider and 1" foreward they don't make them for the 400 so will the 250r's work?

[Big - D Racing]

They should work, but it isn't recomended to have plus 1" forward because it throws off your center point of balance on the quad. I have put 400ex arms on a 250r, so it should work the other way around.