If you are currently on an older version (like Android 4.2 Jelly Bean) and haven't updated to the final KitKat release, you can still do so through these official methods: Lenovo Yoga 8 Tablet Update
If you are still on Android 4.2 Jelly Bean, you can move to 4.4 KitKat via: Over-the-Air (OTA): Settings > System > System Update Lenovo Smart Assistant: You can use the Lenovo PC Support tool to flash the latest official ROM via a computer. The "Experimental" Option: Custom ROMs Because the hardware has only 1GB of RAM lenovo b8000-f android update
for “Lenovo Yoga 8 B8000-F custom ROM” – available ROMs include: If you are currently on an older version (like Android 4
If you’d still like to try custom ROMs, reply with what experience level you have (beginner/intermediate), and I can provide more detailed steps for TWRP/ROM flashing. lenovo b8000-f android update