all you have to do is grind about 1/4 of by the eye because the eye on yfz shocks is fatter than the 400ex's.

yfz shocks lower u to. yfz shocks are about 1" shorter eye to eye than 400ex shocks. theirs pics of em on my 400ex. what i did to lower my 400ex more is twist the pre load rings up off the threads so it would lower me more for the turns. i put the compression on hard.

http://teamxracing.cjb.net/index.php?showtopic=157