A nightly has appeared for the Yu Yureka (Code name: tomato), a more powerful handset that trades out the Snapdragon 410 for the 615. Its nightly comes in at a slightly larger 366MB. Since these devices ship with Cyanogen OS out of the box, flashing CyanogenMod won't provide as stark a difference as you would see replacing the likes of TouchWiz or Sense. But for tinkerers, that's hardly the point. Regardless, these nightly builds are uploaded daily, and stability may not come as part of the package.

You can update YU Yureka AO5510 to Android 5.1 CyanogenMod 12.1 Lollipop custom firmware using the tutorial below. This is an official release by CyanogenMod, a custom ROM which would require a custom recovery like ClockworkMod in order to flash the ROM zip and Google Apps zip files on your phone. Also make sure, your warranty will be voided when you install this custom ROM.
NOTE : This is the LATEST Update of CyanogenMod 12.1 (cm-12.1-20150613-NIGHTLY-tomato.zip) Nightly ROM released on 13 June 2015.

- See more at: http://idroidhorizon..com/2015/06/cyanogenmod-12.1-for-yureka.html