I can confirm that if you boot from the Yosemite (UniBeast) USB that the Time Machine restore is missing from the utility menu...
I used the one on the Mavericks USB all the time oops.
A Maverick USB install would be your best bet.
How to make backup restore in unibeast USB yosemite with Time machines? Time Machine does not appear in options , THANKS!
I do not have usb of the maverick, to put it back, and in my notebook macbook pro can not download maverick, I can not download it from Apple Sotre and not possible downgrade.