Use this installation tool from Cogent to be sure that your DDCs are installed correctly. A strong magnet in the end holds the DDC firmly while you lower it into your fork leg. Then slide the spring over the tool until it holds the DDC down, then gently remove the tool. That simple. Never again question if it is properly seated on the damper rod.
Works equally good for removal as well when you need to change your fork oil. Nice and clean way to remove DDCs. Also works great with Race Tech Emulators.
Installation Instructions go to http://www.motocd.com/mc/index.php/installation-instructions