Blizzard will introduce a new Recruit-A-Friend mount very soon, thus grab your Zhevra reward while it lasts by inviting a friend using a 10-day trial key. The X-53 Touring Rocket will be a very nice incentive to invite a new friend into World of Warcraft because it is a two-seated mount and flies at 310% speed.

Blizzard Quote:
Beginning in just a few days, players who participate in the Recruit-A-Friend program will receive a whole new reward for showing a friend the ropes in Azeroth: the X-53 Touring Rocket, a two-seater flying mount that automatically increases its speed as your mount skill improves (up to 310% speed if you already have a 310% mount). The X-53 will be replacing the current Zhevra mount reward, which is retiring from the Recruit-A-Friend business after a good run. If you’ve already claimed a Zhevra (or claim one prior to the change), you’ll be able to hang on to it, of course. We’ll have more details on the new Recruit-A-Friend mount once it becomes available.

If you’ve claimed your Recruit-A-Friend gift and received the Zhevra you’ll need to refer a new friend (thus gaining a new reward to redeem and claim after this change) to also obtain the X-53 Touring Rocket.

If you have a reward waiting around you have not claimed it can be used to claim a Zhevra now, or you can wait and claim an X-53 after the change.