Well that didn’t take long. A day after the Moto X unveiling, the full system dump became available, and now the wallpapers are ready for your downloading pleasure. As you can see, the themes are very patriotic and most suitable for the U.S. Not surprising since it’s going to be a while until other parts of the world get a chance to buy it.
If you’re using your desktop, just click on the individual images to get the full size version. Then right click and choose to save the image. You will then need to transfer the image(s) to your phone. You can also download these directly to your phone. Just open this web page on your phone and tap on any image, Once the full size version loads, long press on it and select to save the image to your device. Alternatively, you can choose to download all of the images in a zip file by clicking on the link below. Hit the break for all 16 wallpapers. Enjoy!!
source: Android Central Forums