A Motorcycle is a vehicle commonly driven by the people of Earth.
A motorcycle is first seen in Dragon Ball being used by Bulma, who drives Goku and herself around on it whilst searching for the Dragon Balls. Bulma owns at least three motorcycles: a white motorcycle Goku borrowed to save her from a pterodactyl, a red one she used to go on the see with Goku and the Turtle, and a yellow motorcycle she used to go at Aru Village. Launch is seen riding a one-wheeled motorcycle on occasion, during her days as a bandit.
Dr. Flappe owns a snowmobile, Ninja Murasaki stole it when he thought he had the Dragon Balls, instead being Goku's lunch. Although General Blue is never seen riding a motorcycle in the General Blue Saga proper, the cover for Chapter 80 of the manga, The Three Stolen Dragon Balls, depicts him riding a motorcycle.
The policeman in West City who helped Goku find Bulma's house uses an airbike that he got fixed by Dr. Brief. A motorcycle policewoman appears in Dragon Ball Z: Battle of Gods, during Bulma's birthday party, observing the battle against the God of Destruction Beerus from afar.
Goku is often shown on a bike on the covers of Dragon Ball manga chapters.
In Dragon Ball GT, Goku, Pan and Trunks uses space scooters to go into a ship about to fall into a sun, and searches it for a Black Star Dragon Ball. With less than a minute until the ship is destroyed, the gang rushes and gets on their scooters after finding the Dragon Ball and rescuing a green boy. They get off the ship before it melts in the sun, but when their scooters get caught up in the gravity pull, they abandon them while Giru launches a grappling hook at their ship.
Video Game Appearances
The World Tournament Announcer's airbike is an item in Dragon Ball RPG: Shōnen-hen.
In Dragon Ball Z: Shin Budokai, which takes place in Age 776, two years after the defeat of Kid Buu, Yamcha mentions that Goku recently got a bike. Goku says that the bike is broken right now and Gohan mentions that no matter how many times his father tries to fix it, it falls apart again. Yamcha then suggests he should talk to Bulma about it.