Welcome to Motorlap!
If you have deleted the standard bike from your garage, you have lost the data and can no longer retrieve it. Before deleting a vehicle, you have to create a new one, and transfer the data of the old vehicle to the new one, in the session done, entering the session settings this is done.
I'm sorry, but you may not be able to retrieve the data if what I've told you previously happened.
Greetings.