Motorbikes were a form of transport.
File:Motorbike.jpg
A motorbike. (DW: The Ambassadors of Death)
A number of UNIT troops used motorbikes. (DW: The Ambassadors of Death)
Billy had a motorbike with sidecar called The Vincent. The Seventh Doctor drove it for some time. (DW: Delta and the Bannermen)
Blaid Drwg was a motorbike gang. (TWM: Jetsam)
Sarah Jane Smith used her Sonic lipstick on a motorbike. It sparked and disorientated the rider. (SJA: The Lost Boy)
Rory Williams and Amy Pond pursued their daughter Melody on a motorbike. The Teselecta was able to change its shape into a human riding a motorbike to do the same. (DW: Let's Kill Hitler)
