Yes, the Honda 400EX hubs will work. They are 24 spline, but the splines are not exactly the same. I know because I used a set on my LT250R, but I had to beat them on with a mallet, they do not simply slide on like Yamaha hubs. I went with the Honda hubs because I wanted 4X110 pattern, and the Honda hubs give you +1" width on each side.