The fastest model on the market in 1956 was the BSA Gold Star Clubman, which at 110 mph (180 km/h) was not a record holder, but is listed for the sake of illustrating a more complete timeline.
These motorcycles are mentioned here because they meet some of this list's criteria, and are often discussed in media in the same context as production, street-legal motorcycles, but they do not strictly meet all of the criteria, being limited production or made to order, or not generally available for immediate sale to the public, or are track-only and not generally street legal in Europe, Asia, and North America.
[43][46] Sources vary as to whether this unofficial agreement is precise or only approximate, and whether it is defined as 300 km/h or as 186 mph, though the European and Japanese manufacturers normally use metric units.
[49] The agreement between them and the other brands has never been officially acknowledged by the manufacturers, though media sources report it via unnamed informants, and by testing the top speed of motorcycles known to be capable of exceeding the arbitrary maximum.
[53][54] In 2014, Kawasaki announced that the upcoming Ninja H2 will have a non-street legal "track-only" version (Ninja H2R) making 296 hp (221 kW) that will not have a speed limiter, reaching 210 mph (340 km/h) in testing, but Kawasaki did not specify whether they planned to speed limit the street-legal version, which has about 200 hp (150 kW), to conform to the gentlemen's agreement.