Motorcycle

A motorcycle was a two-wheeled land vehicle that was powered by an internal combustion engine. It was used in the 20th century on Earth.

In 1986, an SFPD motorcycle patrolman encountered Pavel Chekov and Uhura, who had traveled through time from the 23rd century. He was impassive as both Uhura and the Russian-accented Chekov asked him to direct them to a nuclear vessel dock facility. 

In 1996, a pair of motorcyclists were seen on Los Angeles beach by time travelers Kathryn Janeway and Chakotay. 

In the 23rd century of an alternate timeline, hovercruisers – essentially motorcycles that floated above the ground, rather than riding on wheels – were used by police officers, on Earth, to aid in law enforcement. owned a wheeled motorcycle, just prior to his enlistment in Starfleet. When he arrived at Riverside Shipyard to board a shuttle to Starfleet Academy, a yard worker complimented Kirk on his vehicle. Kirk then casually tossed the key to the worker, telling him that the motorcycle was now his. Kirk's motorcycle's wheels, however, did not have spokes.