Encontre esto en la pagina de motorola pero donde dice system.img se remplazara pór los
fastboot flash system system.img_sparsechunk.0 al fastboot flash system system.img_sparsechunk.N
FLASH AND RELOCK YOUR DEVICE
After downloading the image for your device:
Make sure you have a Moto Pure Edition or a Developer Edition device.
Make sure you download the corresponding recovery image from the above portal.
To flash, put the phone in fastboot mode:
1. Power OFF your device
2. Then Power ON + Volume Down
Alternatively, you can reboot into fastboot mode if you have adb...adb reboot bootloader.
Next flash the images using fastboot:
$ fastboot flash partition gpt.bin
$ fastboot flash motoboot motoboot.img
$ fastboot reboot-bootloader
$ fastboot flash logo logo.bin
$ fastboot flash boot boot.img
$ fastboot flash recovery recovery.img
$ fastboot flash system system.img
$ fastboot flash modem NON-HLOS.bin
$ fastboot erase modemst1
$ fastboot erase modemst2
$ fastboot flash fsg fsg.mbn
$ fastboot reboot
You also have the option to erase all the data on your device with
$ fastboot erase userdata
$ fastboot erase cache
After performing this sequence, you can relock your device with
$ fastboot oem lock
