Motorbike

Motorbikes were a form of transport.

The Monk's TARDIS briefly took the form of a motorbike when the First Doctor reprogrammed its chameleon circuit to change its outer form to that of a police box. (DW: The Daleks' Master Plan)

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)

In Pervale, the Seventh Doctor faced Midge in a duel which involved the use of motorbikes. (DW: Survival)

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)