Sirius Black's motorcycle

Sirius Black's motorcycle is an ordinary-looking 1959 Triumph 650 T 120 Bonneville Muggle motorcycle with a sidecar, though this is deceiving: it is much larger than its average counterpart, emits a very loud roar, and has the ability to fly. It is large enough to accommodate Hagrid, a half-giant, and is still able to carry an ordinary-size person in the sidecar, and can go fast enough to compete in speed with a broomstick.

1977
In 1977, Sirius and James used the bike while being chased by Muggle policemen.

1981
The motorcycle belonged to Sirius Black, but it was lent to Rubeus Hagrid shortly after Lord Voldemort attacked and killed James and Lily Potter and attacked Harry Potter, saying he wouldn't need it anymore. At first, Hagrid found this to be very odd as, according to him, Sirius "loved that motorbike", and before the revelation of Sirius's innocence suspected it had something to do with his alleged betrayal of the Potters.

Hagrid used the motorcycle to retrieve Harry from the Potter's house and brought him to the Dursleys at Number Four, Privet Drive, where Albus Dumbledore and Minerva McGonagall were waiting.

1997
Sixteen years later, when Alastor Moody leads a group of members of the Order of the Phoenix to Harry Potter from the house of his relatives shortly before his seventeenth birthday, Hagrid is chosen to drive Harry and his possessions to the home of Ted Tonks. Arthur Weasley had helped Hagrid modify the bike with various buttons that could shoot out magically-produced traps in case of a chase. This turns out to be useful, as Hagrid uses buttons to produce a large net, a solid brick wall, and dragon's fire to deter the Death Eaters. However, during the chase, the motorcycle is heavily damaged, made worse when Hagrid tries to use Reparo to fix it, breaking it more. Hagrid has to dive off the motorcycle to keep the Death Eaters from taking Harry, and ultimately they arrive at the Tonks House. Mr. Weasley hides the bike in his backyard shed in hopes of fixing it afterward.

After the War
Mr. Weasley fixed the bike up and later returned it to Harry.

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Philosopher's Stone (film)
 * Harry Potter and the Prisoner of Azkaban
 * Harry Potter and the Deathly Hallows
 * Harry Potter Prequel