easiest way is just flashing a stock rooted rom via your recovery. but if you want an ota, you can have root, but your system has to be completely stock. and you will lose root and your custom recovery. youd have to reflash your recovery and su to reroot.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?