Overclock your Motorola fire xt311 / xt316 up to 800 MHz
Steps:
1: Download kernel image from HERE
2: Download THIS ZIP and extract it somewhere you know
3: Put xt316.img inside the folder that contains start kernel.bat
4: Connect your phone via USB and double click start kernel.bat
5: Download antutu CPU Master from HERE and change the frequencies to your likings
Important notes:
◦ This Kernel / Mod will be disabled when you reboot
◦ You have to run start kernel.bat after each time you restart your device
◦ Your device will be stable on all frequencies from 122.88 MHz ~ 768 MHz
◦ Your device may freeze and not work if overclocked to 800 MHz so take care
◦ I'm not responsible for any damage (if there's any) that happens to your phone.
◦ Don't try to flash the kernel