[Help] Upgrading from 5.0.2(kitkat bootloader) to 5.1

I have reflashed(clean install= wiped data/cache/system) 5.0.2 Asian lollipop stock rom,which doesnt upgrade bootloader i.e im on kitkat bootloader. after flashing, i lost root access and i'm on stock recovery. And Now I got 5.1 OTA, can i install it or not? Because while turning on my device, i get custom image first and then motorola animation,i get this custom image because i have made it by moto g boot logo creator + flasher.
[TIA]