Anti-gravity motorbike
From Tardis Wiki, the free Doctor Who reference
The anti-gravity motorbike was a vehicle used in the Anti-Grav Olympics by the Doctor. After using it he put it in his TARDIS's garage. The Eleventh Doctor hacked into a Spoonhead which used the motorbike to fly up the side of the Shard in London. (TV: The Bells of Saint John)
It appeared to be a modified Triumph Scrambler from 2013 Earth. Who it was modified by is unknown, nor is it known how it came into the Doctor's possession in the first place.
