If you want to venture and explore new territory here. I've certainly played around with device, downgraded restored root and a better accepting version of 4.1.2 to accept the OTA. But, I've done this all through the ability of being Unlocked. What you could attempt to do and understand this is at your own Risk as it is uncharted territory afaik. Start by
opening this site, based on your System version download the 4.1.2 MR2/9.16.6 and save it to your computer. Next, download
RSD Lite 6.1.5 from here. Don't worry about installing the MTK Patch as it is not needed, if you have RSD Lite 6.1.4 that is fine, too. Go ahead and install RSD 6.1.5 to your computer and make sure before doing so you have the latest version of Device Manager on your computer. Make sure on your device you go into Settings> Developer options> USB Debugging and the check the box. Plug your device into your computer via USB, open up RSD Lite and make sure your device is connected in RSD> click on the small square box to the right of the long dialog address and it will open a drop down file opener> find the MR2/4.1.2 CFC and open it until the start to compress and install option is available and just let run, do not attempt to disconnect it, let run all the way through. If it is successful then your device will reboot and you will need to re-enter Google account info and reset everything. Also, if this does work check the Settings> About phone> System Version should be 9.16.6, if it is let everything restore, then go
here for Motochopper and I would suggest
Unlocking the bootloader here as you can Restore Root after the OTA if you lose Root only with an Unlocked Bootloader.