I'm curious to know if a stock YFZ450R carb will bolt onto a 400EX with minimal modifications. I know it probally won't be a perfect fit, but is it do-able?
The YFZ 450R is a different machine from the original YFZ 450. The FCR carb is common to many of the race bikes and even a few quads, so you wouldn't be stuck just looking for a YFZ part.